[clang ...14-15-17] Segmentation fault when using typeof({return x}) as Block Literal Expression return type #77754

d4wae89d498 · 2024-01-11T12:25:00Z

The following code do cause a segfault on clang.

int main()
{
	^typeof({ return 4; }) (int x){ return x; };

	return 0;
}

Clang 14 dump from MacOS

cc test.c clang: error: unable to execute command: Segmentation fault: 11 clang: error: clang frontend command failed due to signal (use -v to see invocation) Apple clang version 14.0.0 (clang-1400.0.29.202) Target: x86_64-apple-darwin22.3.0 Thread model: posix InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin clang: note: diagnostic msg: ********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-28c338.c
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-28c338.sh
clang: note: diagnostic msg: Crash backtrace is located in
clang: note: diagnostic msg: /Users/xxxx/Library/Logs/DiagnosticReports/clang__.crash
clang: note: diagnostic msg: (choose the .crash file that corresponds to your crash)
clang: note: diagnostic msg:

cc -v test.c
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
"/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx13.0.0 -Wundef-prefix=TARGET_OS_ -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -mframe-pointer=all -fno-strict-return -fno-rounding-math -funwind-tables=2 -target-sdk-version=13.1 -fvisibility-inlines-hidden-static-local-var -target-cpu penryn -tune-cpu generic -debugger-tuning=lldb -target-linker-version 820.1 -v -resource-dir /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0 -isysroot /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -I/usr/local/include -internal-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include -internal-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0/include -internal-externc-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -internal-externc-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Wno-reorder-init-list -Wno-implicit-int-float-conversion -Wno-c99-designator -Wno-final-dtor-non-final-class -Wno-extra-semi-stmt -Wno-misleading-indentation -Wno-quoted-include-in-framework-header -Wno-implicit-fallthrough -Wno-enum-enum-conversion -Wno-enum-float-conversion -Wno-elaborated-enum-base -Wno-reserved-identifier -Wno-gnu-folding-constant -Wno-cast-function-type -Wno-bitwise-instead-of-logical -fdebug-compilation-dir=/Users/xxx/Desktop/c-with-class -ferror-limit 19 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fmax-type-align=16 -fcommon -fcolor-diagnostics -clang-vendor-feature=+messageToSelfInClassMethodIdReturnType -clang-vendor-feature=+disableInferNewAvailabilityFromInit -clang-vendor-feature=+disableNonDependentMemberExprInCurrentInstantiation -fno-odr-hash-protocols -clang-vendor-feature=+enableAggressiveVLAFolding -clang-vendor-feature=+revert09abecef7bbf -clang-vendor-feature=+thisNoAlignAttr -clang-vendor-feature=+thisNoNullAttr -mllvm -disable-aligned-alloc-awareness=1 -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-35d470.o -x c test.c
clang -cc1 version 14.0.0 (clang-1400.0.29.202) default target x86_64-apple-darwin22.3.0
ignoring nonexistent directory "/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0/include
/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
End of search list.
clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
clang: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-6480a1.c
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-6480a1.sh
clang: note: diagnostic msg: Crash backtrace is located in
clang: note: diagnostic msg: /Users/xxx/Library/Logs/DiagnosticReports/clang__.crash
clang: note: diagnostic msg: (choose the .crash file that corresponds to your crash)
clang: note: diagnostic msg:

Clang 15 dump from Linux

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /usr/lib/llvm-15/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -fcoverage-compilation-dir=/home/ubuntu -resource-dir /usr/lib/llvm-15/lib/clang/15.0.7 -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.7/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir=/home/ubuntu -ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/test-f3b56b.o -x c test.c 1. test.c:3:20: current parser token ';' 2. test.c:2:1: parsing function body 'main' 3. test.c:2:1: in compound statement ('{}') 4. test.c:3:2: block literal parsing 5. test.c:3:10: in compound statement ('{}') #0 0x00007f04d6f54481 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf54481) #1 0x00007f04d6f5219e llvm::sys::RunSignalHandlers() (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf5219e) #2 0x00007f04d6f549a6 (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf549a6) #3 0x00007f04d583c460 (/lib/x86_64-linux-gnu/libc.so.6+0x3c460) #4 0x00007f04de975442 clang::Sema::ActOnCapScopeReturnStmt(clang::SourceLocation, clang::Expr*, clang::Sema::NamedReturnInfo&, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x1775442) #5 0x00007f04de9764ea clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x17764ea) #6 0x00007f04de97631e clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x177631e) #7 0x00007f04ddd6606b clang::Parser::ParseReturnStatement() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb6606b) #8 0x00007f04ddd5fe6d clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5fe6d) #9 0x00007f04ddd5f24f clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5f24f) #10 0x00007f04ddd67f20 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb67f20) #11 0x00007f04ddd626dc clang::Parser::ParseCompoundStatement(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb626dc) #12 0x00007f04ddd09aa2 clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtr&, clang::SourceLocation&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb09aa2) #13 0x00007f04ddd0e7d5 clang::Parser::ParseExprAfterUnaryExprOrTypeTrait(clang::Token const&, bool&, clang::OpaquePtr&, clang::SourceRange&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0e7d5) #14 0x00007f04ddcdd7f2 clang::Parser::ParseTypeofSpecifier(clang::DeclSpec&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xadd7f2) #15 0x00007f04ddcd3266 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xad3266) #16 0x00007f04ddcc53c6 clang::Parser::ParseSpecifierQualifierList(clang::DeclSpec&, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xac53c6) #17 0x00007f04ddd0f9c6 clang::Parser::ParseBlockId(clang::SourceLocation) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0f9c6) #18 0x00007f04ddd0dfda clang::Parser::ParseBlockLiteralExpression() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0dfda) #19 0x00007f04ddd0703a clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0703a) #20 0x00007f04ddd02321 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb02321) #21 0x00007f04ddd02229 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb02229) #22 0x00007f04ddd616b6 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb616b6) #23 0x00007f04ddd60fd8 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb60fd8) #24 0x00007f04ddd5f24f clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5f24f) #25 0x00007f04ddd67f20 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb67f20) #26 0x00007f04ddd68f55 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb68f55) #27 0x00007f04ddd83152 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb83152) #28 0x00007f04ddcd79e8 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xad79e8) #29 0x00007f04ddd8217a clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb8217a) #30 0x00007f04ddd81bd7 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb81bd7) #31 0x00007f04ddd80efa clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb80efa) #32 0x00007f04ddd7f1c3 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb7f1c3) #33 0x00007f04ddd7ec8f clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb7ec8f) #34 0x00007f04ddcbd9d6 clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xabd9d6) #35 0x00007f04deeb0a15 clang::CodeGenAction::ExecuteAction() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x1cb0a15) #36 0x00007f04df8eebb7 clang::FrontendAction::Execute() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x26eebb7) #37 0x00007f04df85fd06 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x265fd06) #38 0x00007f04df96d16a clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x276d16a) #39 0x0000562c6a016188 cc1_main(llvm::ArrayRef, char const*, void*) (/usr/lib/llvm-15/bin/clang+0x14188) #40 0x0000562c6a01428b (/usr/lib/llvm-15/bin/clang+0x1228b) #41 0x0000562c6a0140e2 clang_main(int, char**) (/usr/lib/llvm-15/bin/clang+0x120e2) #42 0x00007f04d5823a90 (/lib/x86_64-linux-gnu/libc.so.6+0x23a90) #43 0x00007f04d5823b49 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x23b49) #44 0x0000562c6a010ed5 _start (/usr/lib/llvm-15/bin/clang+0xeed5) clang: error: unable to execute command: Segmentation fault (core dumped) clang: error: clang frontend command failed due to signal (use -v to see invocation) Ubuntu clang version 15.0.7 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: ********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/test-696c38.c
clang: note: diagnostic msg: /tmp/test-696c38.sh
clang: note: diagnostic msg:

Clang 17 dump from Linux

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /usr/lib/llvm-17/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/home/ubuntu -resource-dir /usr/lib/llvm-17/lib/clang/17 -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir=/home/ubuntu -ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/test-c92739.o -x c test.c
1.	test.c:3:20: current parser token ';'
2.	test.c:2:1: parsing function body 'main'
3.	test.c:2:1: in compound statement ('{}')
4.	test.c:3:2: block literal parsing
5.	test.c:3:10: in compound statement ('{}')
 #0 0x00007f19acacf126 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccf126)
 #1 0x00007f19acacd360 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccd360)
 #2 0x00007f19acacf7bb (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccf7bb)
 #3 0x00007f19ab63c460 (/lib/x86_64-linux-gnu/libc.so.6+0x3c460)
 #4 0x00007f19b4de4238 clang::Sema::ActOnCapScopeReturnStmt(clang::SourceLocation, clang::Expr*, clang::Sema::NamedReturnInfo&, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e4238)
 #5 0x00007f19b4de5598 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e5598)
 #6 0x00007f19b4de53ce clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e53ce)
 #7 0x00007f19b40e3fe6 clang::Parser::ParseReturnStatement() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae3fe6)
 #8 0x00007f19b40de5aa clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xade5aa)
 #9 0x00007f19b40dd9a8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadd9a8)
#10 0x00007f19b40e5e00 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae5e00)
#11 0x00007f19b40e084d clang::Parser::ParseCompoundStatement(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae084d)
#12 0x00007f19b4086c9d clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtr<clang::QualType>&, clang::SourceLocation&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa86c9d)
#13 0x00007f19b408b8f1 clang::Parser::ParseExprAfterUnaryExprOrTypeTrait(clang::Token const&, bool&, clang::OpaquePtr<clang::QualType>&, clang::SourceRange&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8b8f1)
#14 0x00007f19b4059901 clang::Parser::ParseTypeofSpecifier(clang::DeclSpec&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa59901)
#15 0x00007f19b4052321 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa52321)
#16 0x00007f19b40507b2 clang::Parser::ParseSpecifierQualifierList(clang::DeclSpec&, clang::ImplicitTypenameContext, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa507b2)
#17 0x00007f19b408cc83 clang::Parser::ParseBlockId(clang::SourceLocation) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8cc83)
#18 0x00007f19b408b1a3 clang::Parser::ParseBlockLiteralExpression() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8b1a3)
#19 0x00007f19b4084bf8 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa84bf8)
#20 0x00007f19b407f341 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa7f341)
#21 0x00007f19b407f219 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa7f219)
#22 0x00007f19b40dfaf5 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadfaf5)
#23 0x00007f19b40ddff4 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xaddff4)
#24 0x00007f19b40dd9a8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadd9a8)
#25 0x00007f19b40e5e00 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae5e00)
#26 0x00007f19b40e6eaf clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae6eaf)
#27 0x00007f19b4101503 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xb01503)
#28 0x00007f19b404e420 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa4e420)
#29 0x00007f19b41005a7 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xb005a7)
#30 0x00007f19b40fffa1 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafffa1)
#31 0x00007f19b40ff243 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xaff243)
#32 0x00007f19b40fd6e9 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafd6e9)
#33 0x00007f19b40fd06f clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafd06f)
#34 0x00007f19b4039606 clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa39606)
#35 0x00007f19b5d55ea5 clang::FrontendAction::Execute() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x2755ea5)
#36 0x00007f19b5ccef94 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x26cef94)
#37 0x00007f19b5dd0074 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x27d0074)
#38 0x0000557d1805c918 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-17/bin/clang+0x12918)
#39 0x0000557d1805a415 (/usr/lib/llvm-17/bin/clang+0x10415)
#40 0x0000557d180595b6 clang_main(int, char**, llvm::ToolContext const&) (/usr/lib/llvm-17/bin/clang+0xf5b6)
#41 0x0000557d18066912 main (/usr/lib/llvm-17/bin/clang+0x1c912)
#42 0x00007f19ab623a90 (/lib/x86_64-linux-gnu/libc.so.6+0x23a90)
#43 0x00007f19ab623b49 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x23b49)
#44 0x0000557d18056de5 _start (/usr/lib/llvm-17/bin/clang+0xcde5)
clang-17: error: unable to execute command: Segmentation fault (core dumped)
clang-17: error: clang frontend command failed due to signal (use -v to see invocation)
Ubuntu clang version 17.0.6 (++20231208085911+6009708b4367-1~exp1~20231208090013.78)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-17: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-17: note: diagnostic msg: /tmp/test-e4e2f0.c
clang-17: note: diagnostic msg: /tmp/test-e4e2f0.sh
clang-17: note: diagnostic msg:

********************

The text was updated successfully, but these errors were encountered:

llvmbot · 2024-01-11T15:40:03Z

@llvm/issue-subscribers-clang-frontend

Author: None (d4wae89d498)

The following code do cause a segfault on clang.

int main()
{
	^typeof({ return 4; }) (int x){ return x; };

	return 0;
}

<details>
<summary>Clang 14 dump from MacOS </summary>
cc test.c
clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
clang: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-28c338.c
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-28c338.sh
clang: note: diagnostic msg: Crash backtrace is located in
clang: note: diagnostic msg: /Users/xxxx/Library/Logs/DiagnosticReports/clang_<YYYY-MM-DD-HHMMSS>_<hostname>.crash
clang: note: diagnostic msg: (choose the .crash file that corresponds to your crash)
clang: note: diagnostic msg:

cc -v test.c
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
"/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx13.0.0 -Wundef-prefix=TARGET_OS_ -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -mframe-pointer=all -fno-strict-return -fno-rounding-math -funwind-tables=2 -target-sdk-version=13.1 -fvisibility-inlines-hidden-static-local-var -target-cpu penryn -tune-cpu generic -debugger-tuning=lldb -target-linker-version 820.1 -v -resource-dir /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0 -isysroot /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -I/usr/local/include -internal-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include -internal-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0/include -internal-externc-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -internal-externc-isystem /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Wno-reorder-init-list -Wno-implicit-int-float-conversion -Wno-c99-designator -Wno-final-dtor-non-final-class -Wno-extra-semi-stmt -Wno-misleading-indentation -Wno-quoted-include-in-framework-header -Wno-implicit-fallthrough -Wno-enum-enum-conversion -Wno-enum-float-conversion -Wno-elaborated-enum-base -Wno-reserved-identifier -Wno-gnu-folding-constant -Wno-cast-function-type -Wno-bitwise-instead-of-logical -fdebug-compilation-dir=/Users/xxx/Desktop/c-with-class -ferror-limit 19 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fmax-type-align=16 -fcommon -fcolor-diagnostics -clang-vendor-feature=+messageToSelfInClassMethodIdReturnType -clang-vendor-feature=+disableInferNewAvailabilityFromInit -clang-vendor-feature=+disableNonDependentMemberExprInCurrentInstantiation -fno-odr-hash-protocols -clang-vendor-feature=+enableAggressiveVLAFolding -clang-vendor-feature=+revert09abecef7bbf -clang-vendor-feature=+thisNoAlignAttr -clang-vendor-feature=+thisNoNullAttr -mllvm -disable-aligned-alloc-awareness=1 -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-35d470.o -x c test.c
clang -cc1 version 14.0.0 (clang-1400.0.29.202) default target x86_64-apple-darwin22.3.0
ignoring nonexistent directory "/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.0/include
/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
/Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/Volumes/DATA/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
End of search list.
clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Volumes/DATA/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
clang: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-6480a1.c
clang: note: diagnostic msg: /var/folders/9n/8gxzr2d15ll6h880dgb9ywvr0000gn/T/test-6480a1.sh
clang: note: diagnostic msg: Crash backtrace is located in
clang: note: diagnostic msg: /Users/xxx/Library/Logs/DiagnosticReports/clang_<YYYY-MM-DD-HHMMSS>_<hostname>.crash
clang: note: diagnostic msg: (choose the .crash file that corresponds to your crash)
clang: note: diagnostic msg:

</details>

<details>
<summary>Clang 15 dump from Linux </summary>
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /usr/lib/llvm-15/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -fcoverage-compilation-dir=/home/ubuntu -resource-dir /usr/lib/llvm-15/lib/clang/15.0.7 -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.7/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir=/home/ubuntu -ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/test-f3b56b.o -x c test.c

test.c:3:20: current parser token ';'
test.c:2:1: parsing function body 'main'
test.c:2:1: in compound statement ('{}')
test.c:3:2: block literal parsing
test.c:3:10: in compound statement ('{}')
#0 0x00007f04d6f54481 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf54481)
#1 0x00007f04d6f5219e llvm::sys::RunSignalHandlers() (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf5219e)
#2 0x00007f04d6f549a6 (/usr/lib/llvm-15/bin/../lib/libLLVM-15.so.1+0xf549a6)
#3 0x00007f04d583c460 (/lib/x86_64-linux-gnu/libc.so.6+0x3c460)
#4 0x00007f04de975442 clang::Sema::ActOnCapScopeReturnStmt(clang::SourceLocation, clang::Expr*, clang::Sema::NamedReturnInfo&, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x1775442)
#5 0x00007f04de9764ea clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x17764ea)
#6 0x00007f04de97631e clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x177631e)
#7 0x00007f04ddd6606b clang::Parser::ParseReturnStatement() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb6606b)
#8 0x00007f04ddd5fe6d clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5fe6d)
#9 0x00007f04ddd5f24f clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5f24f)
#10 0x00007f04ddd67f20 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb67f20)
#11 0x00007f04ddd626dc clang::Parser::ParseCompoundStatement(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb626dc)
#12 0x00007f04ddd09aa2 clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&, bool, bool, clang::OpaquePtr<clang::QualType>&, clang::SourceLocation&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb09aa2)
#13 0x00007f04ddd0e7d5 clang::Parser::ParseExprAfterUnaryExprOrTypeTrait(clang::Token const&, bool&, clang::OpaquePtr<clang::QualType>&, clang::SourceRange&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0e7d5)
#14 0x00007f04ddcdd7f2 clang::Parser::ParseTypeofSpecifier(clang::DeclSpec&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xadd7f2)
#15 0x00007f04ddcd3266 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xad3266)
#16 0x00007f04ddcc53c6 clang::Parser::ParseSpecifierQualifierList(clang::DeclSpec&, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xac53c6)
#17 0x00007f04ddd0f9c6 clang::Parser::ParseBlockId(clang::SourceLocation) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0f9c6)
#18 0x00007f04ddd0dfda clang::Parser::ParseBlockLiteralExpression() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0dfda)
#19 0x00007f04ddd0703a clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb0703a)
#20 0x00007f04ddd02321 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb02321)
#21 0x00007f04ddd02229 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb02229)
#22 0x00007f04ddd616b6 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb616b6)
#23 0x00007f04ddd60fd8 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb60fd8)
#24 0x00007f04ddd5f24f clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb5f24f)
#25 0x00007f04ddd67f20 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb67f20)
#26 0x00007f04ddd68f55 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb68f55)
#27 0x00007f04ddd83152 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb83152)
#28 0x00007f04ddcd79e8 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xad79e8)
#29 0x00007f04ddd8217a clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb8217a)
#30 0x00007f04ddd81bd7 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb81bd7)
#31 0x00007f04ddd80efa clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb80efa)
#32 0x00007f04ddd7f1c3 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb7f1c3)
#33 0x00007f04ddd7ec8f clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xb7ec8f)
#34 0x00007f04ddcbd9d6 clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0xabd9d6)
#35 0x00007f04deeb0a15 clang::CodeGenAction::ExecuteAction() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x1cb0a15)
#36 0x00007f04df8eebb7 clang::FrontendAction::Execute() (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x26eebb7)
#37 0x00007f04df85fd06 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x265fd06)
#38 0x00007f04df96d16a clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-15/bin/../lib/libclang-cpp.so.15+0x276d16a)
#39 0x0000562c6a016188 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-15/bin/clang+0x14188)
#40 0x0000562c6a01428b (/usr/lib/llvm-15/bin/clang+0x1228b)
#41 0x0000562c6a0140e2 clang_main(int, char**) (/usr/lib/llvm-15/bin/clang+0x120e2)
#42 0x00007f04d5823a90 (/lib/x86_64-linux-gnu/libc.so.6+0x23a90)
#43 0x00007f04d5823b49 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x23b49)
#44 0x0000562c6a010ed5 _start (/usr/lib/llvm-15/bin/clang+0xeed5)
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Ubuntu clang version 15.0.7
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/test-696c38.c
clang: note: diagnostic msg: /tmp/test-696c38.sh
clang: note: diagnostic msg:
</details>

<summary>Clang 17 dump from Linux </summary>

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /usr/lib/llvm-17/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/home/ubuntu -resource-dir /usr/lib/llvm-17/lib/clang/17 -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir=/home/ubuntu -ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/test-c92739.o -x c test.c
1.	test.c:3:20: current parser token ';'
2.	test.c:2:1: parsing function body 'main'
3.	test.c:2:1: in compound statement ('{}')
4.	test.c:3:2: block literal parsing
5.	test.c:3:10: in compound statement ('{}')
 #<!-- -->0 0x00007f19acacf126 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccf126)
 #<!-- -->1 0x00007f19acacd360 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccd360)
 #<!-- -->2 0x00007f19acacf7bb (/usr/lib/llvm-17/bin/../lib/libLLVM-17.so.1+0xccf7bb)
 #<!-- -->3 0x00007f19ab63c460 (/lib/x86_64-linux-gnu/libc.so.6+0x3c460)
 #<!-- -->4 0x00007f19b4de4238 clang::Sema::ActOnCapScopeReturnStmt(clang::SourceLocation, clang::Expr*, clang::Sema::NamedReturnInfo&amp;, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e4238)
 #<!-- -->5 0x00007f19b4de5598 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e5598)
 #<!-- -->6 0x00007f19b4de53ce clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x17e53ce)
 #<!-- -->7 0x00007f19b40e3fe6 clang::Parser::ParseReturnStatement() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae3fe6)
 #<!-- -->8 0x00007f19b40de5aa clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xade5aa)
 #<!-- -->9 0x00007f19b40dd9a8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadd9a8)
#<!-- -->10 0x00007f19b40e5e00 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae5e00)
#<!-- -->11 0x00007f19b40e084d clang::Parser::ParseCompoundStatement(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae084d)
#<!-- -->12 0x00007f19b4086c9d clang::Parser::ParseParenExpression(clang::Parser::ParenParseOption&amp;, bool, bool, clang::OpaquePtr&lt;clang::QualType&gt;&amp;, clang::SourceLocation&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa86c9d)
#<!-- -->13 0x00007f19b408b8f1 clang::Parser::ParseExprAfterUnaryExprOrTypeTrait(clang::Token const&amp;, bool&amp;, clang::OpaquePtr&lt;clang::QualType&gt;&amp;, clang::SourceRange&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8b8f1)
#<!-- -->14 0x00007f19b4059901 clang::Parser::ParseTypeofSpecifier(clang::DeclSpec&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa59901)
#<!-- -->15 0x00007f19b4052321 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa52321)
#<!-- -->16 0x00007f19b40507b2 clang::Parser::ParseSpecifierQualifierList(clang::DeclSpec&amp;, clang::ImplicitTypenameContext, clang::AccessSpecifier, clang::Parser::DeclSpecContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa507b2)
#<!-- -->17 0x00007f19b408cc83 clang::Parser::ParseBlockId(clang::SourceLocation) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8cc83)
#<!-- -->18 0x00007f19b408b1a3 clang::Parser::ParseBlockLiteralExpression() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa8b1a3)
#<!-- -->19 0x00007f19b4084bf8 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&amp;, clang::Parser::TypeCastState, bool, bool*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa84bf8)
#<!-- -->20 0x00007f19b407f341 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa7f341)
#<!-- -->21 0x00007f19b407f219 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa7f219)
#<!-- -->22 0x00007f19b40dfaf5 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadfaf5)
#<!-- -->23 0x00007f19b40ddff4 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xaddff4)
#<!-- -->24 0x00007f19b40dd9a8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xadd9a8)
#<!-- -->25 0x00007f19b40e5e00 clang::Parser::ParseCompoundStatementBody(bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae5e00)
#<!-- -->26 0x00007f19b40e6eaf clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xae6eaf)
#<!-- -->27 0x00007f19b4101503 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xb01503)
#<!-- -->28 0x00007f19b404e420 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa4e420)
#<!-- -->29 0x00007f19b41005a7 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xb005a7)
#<!-- -->30 0x00007f19b40fffa1 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafffa1)
#<!-- -->31 0x00007f19b40ff243 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xaff243)
#<!-- -->32 0x00007f19b40fd6e9 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafd6e9)
#<!-- -->33 0x00007f19b40fd06f clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xafd06f)
#<!-- -->34 0x00007f19b4039606 clang::ParseAST(clang::Sema&amp;, bool, bool) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0xa39606)
#<!-- -->35 0x00007f19b5d55ea5 clang::FrontendAction::Execute() (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x2755ea5)
#<!-- -->36 0x00007f19b5ccef94 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x26cef94)
#<!-- -->37 0x00007f19b5dd0074 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-17/bin/../lib/libclang-cpp.so.17+0x27d0074)
#<!-- -->38 0x0000557d1805c918 cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/usr/lib/llvm-17/bin/clang+0x12918)
#<!-- -->39 0x0000557d1805a415 (/usr/lib/llvm-17/bin/clang+0x10415)
#<!-- -->40 0x0000557d180595b6 clang_main(int, char**, llvm::ToolContext const&amp;) (/usr/lib/llvm-17/bin/clang+0xf5b6)
#<!-- -->41 0x0000557d18066912 main (/usr/lib/llvm-17/bin/clang+0x1c912)
#<!-- -->42 0x00007f19ab623a90 (/lib/x86_64-linux-gnu/libc.so.6+0x23a90)
#<!-- -->43 0x00007f19ab623b49 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x23b49)
#<!-- -->44 0x0000557d18056de5 _start (/usr/lib/llvm-17/bin/clang+0xcde5)
clang-17: error: unable to execute command: Segmentation fault (core dumped)
clang-17: error: clang frontend command failed due to signal (use -v to see invocation)
Ubuntu clang version 17.0.6 (++20231208085911+6009708b4367-1~exp1~20231208090013.78)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-17: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-17: note: diagnostic msg: /tmp/test-e4e2f0.c
clang-17: note: diagnostic msg: /tmp/test-e4e2f0.sh
clang-17: note: diagnostic msg:

********************

</details>

shafik · 2024-01-11T16:19:27Z

Confirmed: https://godbolt.org/z/nWaM7hb7s

Assertion:

clang++: /root/llvm-project/clang/include/clang/AST/Type.h:753:
const clang::ExtQualsTypeCommonBase* clang::QualType::getCommonPtr() const:
Assertion `!isNull() && "Cannot retrieve a NULL type pointer"' failed.

CC @rjmccall @Bigcheese

github-actions bot added the clang Clang issues not falling into any other category label Jan 11, 2024

EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] and removed clang Clang issues not falling into any other category labels Jan 11, 2024

shafik added the confirmed Verified by a second party label Jan 11, 2024

MitalAshok mentioned this issue Jan 11, 2024

return statements in statement expressions in unevaluated contexts are ignored #77808

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[clang ...14-15-17] Segmentation fault when using typeof({return x}) as Block Literal Expression return type #77754

[clang ...14-15-17] Segmentation fault when using typeof({return x}) as Block Literal Expression return type #77754

d4wae89d498 commented Jan 11, 2024 •

edited by tbaederr

llvmbot commented Jan 11, 2024

shafik commented Jan 11, 2024

[clang ...14-15-17] Segmentation fault when using typeof({return x}) as Block Literal Expression return type #77754

[clang ...14-15-17] Segmentation fault when using typeof({return x}) as Block Literal Expression return type #77754

Comments

d4wae89d498 commented Jan 11, 2024 • edited by tbaederr

llvmbot commented Jan 11, 2024

shafik commented Jan 11, 2024

d4wae89d498 commented Jan 11, 2024 •

edited by tbaederr