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Front end crash on short (66 byte) code snippet #79745

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tonyelewis opened this issue Jan 28, 2024 · 4 comments
Closed

Front end crash on short (66 byte) code snippet #79745

tonyelewis opened this issue Jan 28, 2024 · 4 comments
Labels
clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] duplicate Resolved as duplicate

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@tonyelewis
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Running clang++ a.cpp with up to date build (987087df90026605fc8d03ebda5a1cd31b71e609, 2024-01-23) on:

template <typename = int> struct a;
auto f() {
	a c;
	return c;
}

(demonstrated: https://godbolt.org/z/4jv8E7ns8)

…gives:

a.cpp:3:4: error: implicit instantiation of undefined template 'a<>'
    3 |         a c;
      |           ^
a.cpp:1:34: note: template is declared here
    1 | template <typename = int> struct a;
      |                                  ^
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: /the-llvm-dir/bin/clang-19 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name a.cpp -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 -fdebug-compilation-dir=/tmp -fcoverage-compilation-dir=/tmp -resource-dir /the-llvm-dir/lib/clang/19 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/x86_64-linux-gnu/c++/12 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/backward -internal-isystem /the-llvm-dir/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/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 -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/a-a3d6fd.o -x c++ a.cpp
1.	a.cpp:4:10: current parser token ';'
2.	a.cpp:2:10: parsing function body 'f'
3.	a.cpp:2:10: in compound statement ('{}')
 #0 0x000055ec1be34450 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/the-llvm-dir/bin/clang-19+0x37c5450)
 #1 0x000055ec1be31a1e SignalHandler(int) Signals.cpp:0:0
 #2 0x00007fc8d5e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x000055ec1f08070c clang::ASTContext::getASTRecordLayout(clang::RecordDecl const*) const (/the-llvm-dir/bin/clang-19+0x6a1170c)
 #4 0x000055ec1ec1d0c4 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x65ae0c4)
 #5 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #6 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #7 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #8 0x000055ec1ec1d729 clang::ASTContext::getTypeAlignInChars(clang::QualType) const (/the-llvm-dir/bin/clang-19+0x65ae729)
 #9 0x000055ec1e71591c clang::Sema::getNamedReturnInfo(clang::VarDecl const*) (/the-llvm-dir/bin/clang-19+0x60a691c)
#10 0x000055ec1e7159a2 clang::Sema::getNamedReturnInfo(clang::Expr*&, clang::Sema::SimplerImplicitMoveMode) (/the-llvm-dir/bin/clang-19+0x60a69a2)
#11 0x000055ec1e73e0a4 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/the-llvm-dir/bin/clang-19+0x60cf0a4)
#12 0x000055ec1e73f8c7 clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/the-llvm-dir/bin/clang-19+0x60d08c7)
#13 0x000055ec1df53718 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/the-llvm-dir/bin/clang-19+0x58e4718)
#14 0x000055ec1df546c8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/the-llvm-dir/bin/clang-19+0x58e56c8)
#15 0x000055ec1df554c1 clang::Parser::ParseCompoundStatementBody(bool) (/the-llvm-dir/bin/clang-19+0x58e64c1)
#16 0x000055ec1df5844a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/the-llvm-dir/bin/clang-19+0x58e944a)
#17 0x000055ec1de73ae6 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/the-llvm-dir/bin/clang-19+0x5804ae6)
#18 0x000055ec1dead3df clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/the-llvm-dir/bin/clang-19+0x583e3df)
#19 0x000055ec1de6e4f6 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/the-llvm-dir/bin/clang-19+0x57ff4f6)
#20 0x000055ec1de75c42 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/the-llvm-dir/bin/clang-19+0x5806c42)
#21 0x000055ec1de77627 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/the-llvm-dir/bin/clang-19+0x5808627)
#22 0x000055ec1de67d2a clang::ParseAST(clang::Sema&, bool, bool) (/the-llvm-dir/bin/clang-19+0x57f8d2a)
#23 0x000055ec1c8c6b31 clang::FrontendAction::Execute() (/the-llvm-dir/bin/clang-19+0x4257b31)
#24 0x000055ec1c8454f9 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/the-llvm-dir/bin/clang-19+0x41d64f9)
#25 0x000055ec1c989113 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/the-llvm-dir/bin/clang-19+0x431a113)
#26 0x000055ec194cc833 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/the-llvm-dir/bin/clang-19+0xe5d833)
#27 0x000055ec194c4c9d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#28 0x000055ec194c88fa clang_main(int, char**, llvm::ToolContext const&) (/the-llvm-dir/bin/clang-19+0xe598fa)
#29 0x000055ec193c9e9b main (/the-llvm-dir/bin/clang-19+0xd5ae9b)
#30 0x00007fc8d5e29d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#31 0x00007fc8d5e29e40 call_init ./csu/../csu/libc-start.c:128:20
#32 0x00007fc8d5e29e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#33 0x000055ec194c4115 _start (/the-llvm-dir/bin/clang-19+0xe55115)
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 19.0.0git (https://github.com/llvm/llvm-project.git 987087df90026605fc8d03ebda5a1cd31b71e609)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /the-llvm-dir/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/a-f4ce2e.cpp
clang++: note: diagnostic msg: /tmp/a-f4ce2e.sh
clang++: note: diagnostic msg: 

********************
@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] and removed new issue labels Jan 28, 2024
@llvmbot
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llvmbot commented Jan 28, 2024

@llvm/issue-subscribers-clang-frontend

Author: Tony E Lewis (tonyelewis)

Running `clang++ a.cpp` with up to date build (`987087df90026605fc8d03ebda5a1cd31b71e609`, 2024-01-23) on: 
template &lt;typename = int&gt; struct a;
auto f() {
	a c;
	return c;
}

(demonstrated: https://godbolt.org/z/4jv8E7ns8)

&hellip;gives:

a.cpp:3:4: error: implicit instantiation of undefined template 'a&lt;&gt;'
    3 |         a c;
      |           ^
a.cpp:1:34: note: template is declared here
    1 | template &lt;typename = int&gt; struct a;
      |                                  ^
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: /the-llvm-dir/bin/clang-19 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name a.cpp -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 -fdebug-compilation-dir=/tmp -fcoverage-compilation-dir=/tmp -resource-dir /the-llvm-dir/lib/clang/19 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/x86_64-linux-gnu/c++/12 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/backward -internal-isystem /the-llvm-dir/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/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 -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/a-a3d6fd.o -x c++ a.cpp
1.	a.cpp:4:10: current parser token ';'
2.	a.cpp:2:10: parsing function body 'f'
3.	a.cpp:2:10: in compound statement ('{}')
 #<!-- -->0 0x000055ec1be34450 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/the-llvm-dir/bin/clang-19+0x37c5450)
 #<!-- -->1 0x000055ec1be31a1e SignalHandler(int) Signals.cpp:0:0
 #<!-- -->2 0x00007fc8d5e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->3 0x000055ec1f08070c clang::ASTContext::getASTRecordLayout(clang::RecordDecl const*) const (/the-llvm-dir/bin/clang-19+0x6a1170c)
 #<!-- -->4 0x000055ec1ec1d0c4 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x65ae0c4)
 #<!-- -->5 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #<!-- -->6 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #<!-- -->7 0x000055ec1ec06f42 clang::ASTContext::getTypeInfo(clang::Type const*) const (/the-llvm-dir/bin/clang-19+0x6597f42)
 #<!-- -->8 0x000055ec1ec1d729 clang::ASTContext::getTypeAlignInChars(clang::QualType) const (/the-llvm-dir/bin/clang-19+0x65ae729)
 #<!-- -->9 0x000055ec1e71591c clang::Sema::getNamedReturnInfo(clang::VarDecl const*) (/the-llvm-dir/bin/clang-19+0x60a691c)
#<!-- -->10 0x000055ec1e7159a2 clang::Sema::getNamedReturnInfo(clang::Expr*&amp;, clang::Sema::SimplerImplicitMoveMode) (/the-llvm-dir/bin/clang-19+0x60a69a2)
#<!-- -->11 0x000055ec1e73e0a4 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/the-llvm-dir/bin/clang-19+0x60cf0a4)
#<!-- -->12 0x000055ec1e73f8c7 clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/the-llvm-dir/bin/clang-19+0x60d08c7)
#<!-- -->13 0x000055ec1df53718 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/the-llvm-dir/bin/clang-19+0x58e4718)
#<!-- -->14 0x000055ec1df546c8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 32u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/the-llvm-dir/bin/clang-19+0x58e56c8)
#<!-- -->15 0x000055ec1df554c1 clang::Parser::ParseCompoundStatementBody(bool) (/the-llvm-dir/bin/clang-19+0x58e64c1)
#<!-- -->16 0x000055ec1df5844a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/the-llvm-dir/bin/clang-19+0x58e944a)
#<!-- -->17 0x000055ec1de73ae6 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/the-llvm-dir/bin/clang-19+0x5804ae6)
#<!-- -->18 0x000055ec1dead3df clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/the-llvm-dir/bin/clang-19+0x583e3df)
#<!-- -->19 0x000055ec1de6e4f6 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/the-llvm-dir/bin/clang-19+0x57ff4f6)
#<!-- -->20 0x000055ec1de75c42 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/the-llvm-dir/bin/clang-19+0x5806c42)
#<!-- -->21 0x000055ec1de77627 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/the-llvm-dir/bin/clang-19+0x5808627)
#<!-- -->22 0x000055ec1de67d2a clang::ParseAST(clang::Sema&amp;, bool, bool) (/the-llvm-dir/bin/clang-19+0x57f8d2a)
#<!-- -->23 0x000055ec1c8c6b31 clang::FrontendAction::Execute() (/the-llvm-dir/bin/clang-19+0x4257b31)
#<!-- -->24 0x000055ec1c8454f9 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/the-llvm-dir/bin/clang-19+0x41d64f9)
#<!-- -->25 0x000055ec1c989113 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/the-llvm-dir/bin/clang-19+0x431a113)
#<!-- -->26 0x000055ec194cc833 cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/the-llvm-dir/bin/clang-19+0xe5d833)
#<!-- -->27 0x000055ec194c4c9d ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->28 0x000055ec194c88fa clang_main(int, char**, llvm::ToolContext const&amp;) (/the-llvm-dir/bin/clang-19+0xe598fa)
#<!-- -->29 0x000055ec193c9e9b main (/the-llvm-dir/bin/clang-19+0xd5ae9b)
#<!-- -->30 0x00007fc8d5e29d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#<!-- -->31 0x00007fc8d5e29e40 call_init ./csu/../csu/libc-start.c:128:20
#<!-- -->32 0x00007fc8d5e29e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#<!-- -->33 0x000055ec194c4115 _start (/the-llvm-dir/bin/clang-19+0xe55115)
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 19.0.0git (https://github.com/llvm/llvm-project.git 987087df90026605fc8d03ebda5a1cd31b71e609)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /the-llvm-dir/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/a-f4ce2e.cpp
clang++: note: diagnostic msg: /tmp/a-f4ce2e.sh
clang++: note: diagnostic msg: 

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

@AMS21
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AMS21 commented Jan 28, 2024

Using a debug build of clang of commit 3bf21ba597d00253c6ef55bb0b499711dd778d84 it seems to hit this assertion.

Full output:

/mnt/data/dev/llvm-project/build/test.cpp:3:5: error: implicit instantiation of undefined template 'a<>'
    3 |   a c;
      |     ^
/mnt/data/dev/llvm-project/build/test.cpp:1:34: note: template is declared here
    1 | template <typename = int> struct a;
      |                                  ^
clang-19: /mnt/data/dev/llvm-project/clang/lib/AST/RecordLayoutBuilder.cpp:3335: const ASTRecordLayout &clang::ASTContext::getASTRecordLayout(const RecordDecl *) const: Assertion `D && "Cannot get layout of forward declarations!"' failed.
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: /mnt/data/dev/llvm-project/build/bin/clang-19 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -main-file-name test.cpp -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 -fdebug-compilation-dir=/mnt/data/dev/llvm-project -fcoverage-compilation-dir=/mnt/data/dev/llvm-project -resource-dir /mnt/data/dev/llvm-project/build/lib/clang/19 -internal-isystem /usr/lib64/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1 -internal-isystem /usr/lib64/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1/x86_64-pc-linux-gnu -internal-isystem /usr/lib64/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1/backward -internal-isystem /mnt/data/dev/llvm-project/build/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib64/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../x86_64-pc-linux-gnu/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/test-8ba5d9.o -x c++ /mnt/data/dev/llvm-project/build/test.cpp
1.      /mnt/data/dev/llvm-project/build/test.cpp:4:11: current parser token ';'
2.      /mnt/data/dev/llvm-project/build/test.cpp:2:10: parsing function body 'f'
3.      /mnt/data/dev/llvm-project/build/test.cpp:2:10: in compound statement ('{}')
 #0 0x0000555560ea84a1 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /mnt/data/dev/llvm-project/llvm/lib/Support/Unix/Signals.inc:723:11
 #1 0x0000555560ea899b PrintStackTraceSignalHandler(void*) /mnt/data/dev/llvm-project/llvm/lib/Support/Unix/Signals.inc:798:1
 #2 0x0000555560ea6996 llvm::sys::RunSignalHandlers() /mnt/data/dev/llvm-project/llvm/lib/Support/Signals.cpp:105:5
 #3 0x0000555560ea9135 SignalHandler(int) /mnt/data/dev/llvm-project/llvm/lib/Support/Unix/Signals.inc:413:1
 #4 0x00007ffff785c710 (/usr/lib/libc.so.6+0x3e710)
 #5 0x00007ffff78ac83c (/usr/lib/libc.so.6+0x8e83c)
 #6 0x00007ffff785c668 gsignal (/usr/lib/libc.so.6+0x3e668)
 #7 0x00007ffff78444b8 abort (/usr/lib/libc.so.6+0x264b8)
 #8 0x00007ffff78443dc (/usr/lib/libc.so.6+0x263dc)
 #9 0x00007ffff7854d26 (/usr/lib/libc.so.6+0x36d26)
#10 0x00005555679a608d clang::ASTContext::getASTRecordLayout(clang::RecordDecl const*) const /mnt/data/dev/llvm-project/clang/lib/AST/RecordLayoutBuilder.cpp:3336:3
#11 0x0000555567254df5 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:2287:28
#12 0x0000555567255f45 clang::ASTContext::getTypeInfo(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:1866:17
#13 0x0000555567254f66 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:2305:12
#14 0x0000555567255f45 clang::ASTContext::getTypeInfo(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:1866:17
#15 0x0000555567255150 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:2339:12
#16 0x0000555567255f45 clang::ASTContext::getTypeInfo(clang::Type const*) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:1866:17
#17 0x000055556132028d clang::ASTContext::getTypeInfo(clang::QualType) const /mnt/data/dev/llvm-project/clang/include/clang/AST/ASTContext.h:2309:51
#18 0x0000555561c53655 clang::ASTContext::getTypeAlign(clang::QualType) const /mnt/data/dev/llvm-project/clang/include/clang/AST/ASTContext.h:2346:52
#19 0x0000555567256a79 clang::ASTContext::getTypeAlignInChars(clang::QualType) const /mnt/data/dev/llvm-project/clang/lib/AST/ASTContext.cpp:2433:30
#20 0x00005555667fe2ca clang::Sema::getNamedReturnInfo(clang::VarDecl const*) /mnt/data/dev/llvm-project/clang/lib/Sema/SemaStmt.cpp:3460:42
#21 0x00005555667fdfde clang::Sema::getNamedReturnInfo(clang::Expr*&, clang::Sema::SimplerImplicitMoveMode) /mnt/data/dev/llvm-project/clang/lib/Sema/SemaStmt.cpp:3394:25
#22 0x0000555566800c05 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) /mnt/data/dev/llvm-project/clang/lib/Sema/SemaStmt.cpp:3955:28
#23 0x0000555566800ad4 clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) /mnt/data/dev/llvm-project/clang/lib/Sema/SemaStmt.cpp:3916:7
#24 0x000055556565ab1f clang::Parser::ParseReturnStatement() /mnt/data/dev/llvm-project/clang/lib/Parse/ParseStmt.cpp:2456:18
#25 0x0000555565653de9 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseStmt.cpp:326:11
#26 0x000055556565328b clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseStmt.cpp:118:20
#27 0x000055556565c3c2 clang::Parser::ParseCompoundStatementBody(bool) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseStmt.cpp:1236:11
#28 0x000055556565dab1 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseStmt.cpp:2514:21
#29 0x0000555565587314 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /mnt/data/dev/llvm-project/clang/lib/Parse/Parser.cpp:1516:3
#30 0x000055556562ce3e clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseDecl.cpp:2272:27
#31 0x000055556558610c clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /mnt/data/dev/llvm-project/clang/lib/Parse/Parser.cpp:1244:10
#32 0x00005555655855fe clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /mnt/data/dev/llvm-project/clang/lib/Parse/Parser.cpp:1266:12
#33 0x0000555565584e80 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /mnt/data/dev/llvm-project/clang/lib/Parse/Parser.cpp:1070:14
#34 0x0000555565582cdc clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) /mnt/data/dev/llvm-project/clang/lib/Parse/Parser.cpp:760:12
#35 0x000055556557da9a clang::ParseAST(clang::Sema&, bool, bool) /mnt/data/dev/llvm-project/clang/lib/Parse/ParseAST.cpp:163:16
#36 0x00005555622707cb clang::ASTFrontendAction::ExecuteAction() /mnt/data/dev/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1185:1
#37 0x0000555561d5f0e6 clang::CodeGenAction::ExecuteAction() /mnt/data/dev/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1154:5
#38 0x00005555622701ec clang::FrontendAction::Execute() /mnt/data/dev/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1073:7
#39 0x00005555621926dc clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /mnt/data/dev/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1057:23
#40 0x00005555624420b1 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /mnt/data/dev/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:272:8
#41 0x000055555d264b9f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /mnt/data/dev/llvm-project/clang/tools/driver/cc1_main.cpp:294:13
#42 0x000055555d2552a2 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /mnt/data/dev/llvm-project/clang/tools/driver/driver.cpp:365:5
#43 0x000055555d253feb clang_main(int, char**, llvm::ToolContext const&) /mnt/data/dev/llvm-project/clang/tools/driver/driver.cpp:405:5
#44 0x000055555d289045 main /mnt/data/dev/llvm-project/build/tools/clang/tools/driver/clang-driver.cpp:17:3
#45 0x00007ffff7845cd0 (/usr/lib/libc.so.6+0x27cd0)
#46 0x00007ffff7845d8a __libc_start_main (/usr/lib/libc.so.6+0x27d8a)
#47 0x000055555d253a65 _start (/mnt/data/dev/llvm-project/build/bin/clang-19+0x7cffa65)
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 19.0.0git (https://github.com/AMS21/llvm-project.git 3bf21ba597d00253c6ef55bb0b499711dd778d84)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /mnt/data/dev/llvm-project/build/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-a4bf7e.cpp
clang: note: diagnostic msg: /tmp/test-a4bf7e.sh
clang: note: diagnostic msg: 

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

@shafik
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shafik commented Jan 28, 2024

Duplicate of: #63244

Although this case looks slightly simpler.

@shafik shafik closed this as not planned Won't fix, can't repro, duplicate, stale Jan 28, 2024
@shafik shafik mentioned this issue Jan 28, 2024
Closed
@EugeneZelenko EugeneZelenko added the duplicate Resolved as duplicate label Jan 29, 2024
shafik added a commit to shafik/llvm-project that referenced this issue Jan 29, 2024
@shafik
[Clang][Sema] Fix crash when type used in return statement contains e…
82d2561 
…rrors

In Sema in `BuildReturnStmt(...)` when we try to determine is the type is move
eligable or copy elidable we don't currently check of the init of the `VarDecl`
contain errors or not. This can lead to a crash since we may send a type that
is not complete into `getTypeInfo(...)` which does not allow this.

This fixes: llvm#63244
llvm#79745
@shafik shafik mentioned this issue Jan 29, 2024
Merged
shafik added a commit to shafik/llvm-project that referenced this issue Jan 29, 2024
@shafik
[Clang][Sema] Fix crash when type used in return statement contains e…
dde16b4 
…rrors

In Sema in `BuildReturnStmt(...)` when we try to determine is the type is move
eligable or copy elidable we don't currently check of the init of the `VarDecl`
contain errors or not. This can lead to a crash since we may send a type that
is not complete into `getTypeInfo(...)` which does not allow this.

This fixes: llvm#63244
llvm#79745
shafik added a commit to shafik/llvm-project that referenced this issue Jan 29, 2024
@shafik
[Clang][Sema] Fix crash when type used in return statement contains e…
f7f1007 
…rrors

In Sema in `BuildReturnStmt(...)` when we try to determine is the type is move
eligable or copy elidable we don't currently check of the init of the `VarDecl`
contain errors or not. This can lead to a crash since we may send a type that
is not complete into `getTypeInfo(...)` which does not allow this.

This fixes: llvm#63244
llvm#79745
shafik added a commit that referenced this issue Jan 29, 2024
@shafik
[Clang][Sema] Fix crash when type used in return statement contains e…
7b0396f 
…rrors (#79788)

In Sema in `BuildReturnStmt(...)` when we try to determine is the type
is move eligible or copy elidable we don't currently check of the init
of the `VarDecl` contain errors or not. This can lead to a crash since
we may send a type that is not complete into `getTypeInfo(...)` which
does not allow this.

This fixes: #63244
#79745
@tonyelewis
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Thank you so much for very quickly fixing this (via #63244, which it duplicated).

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clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] duplicate Resolved as duplicate
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