Crash in ActOnStartOfSwitchStmt

[sam-mccall]

crash.cc:

#include "crash.h"

namespace b { template<typename> bool xxx(); }
namespace c { int* xxx; }

void crash() { switch (xxx) {} }

crash.h:

namespace a { namespace xxx {} }

Removing any one of the xxxs eliminates the crash. Moving the namespace out of the header eliminates the crash.

clangd: /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Sema/SemaStmt.cpp:737: clang::StmtResult clang::Sema::ActOnStartOfSwitchStmt(clang::SourceLocation, clang::Stmt *, clang::Sema::ConditionResult): Assertion `CondExpr->getType()->isIntegralOrEnumerationType() && "invalid condition type"' failed.
 #0 0x00000000004f8524 PrintStackTrace /usr/local/google/home/sammccall/src/llvm-mono/llvm/lib/Support/Unix/Signals.inc:564:13
 #1 0x00000000004f8524 PrintStackTraceSignalHandler(void*) /usr/local/google/home/sammccall/src/llvm-mono/llvm/lib/Support/Unix/Signals.inc:624:0
 #2 0x00000000004f626c llvm::sys::RunSignalHandlers() /usr/local/google/home/sammccall/src/llvm-mono/llvm/lib/Support/Signals.cpp:69:18
 #3 0x00000000004f872c SignalHandler(int) /usr/local/google/home/sammccall/src/llvm-mono/llvm/lib/Support/Unix/Signals.inc:396:3
 #4 0x00007fe44dc44520 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x13520)
 #5 0x00007fe44d714081 raise /build/glibc-G5rUEF/glibc-2.29/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #6 0x00007fe44d6ff535 abort /build/glibc-G5rUEF/glibc-2.29/stdlib/abort.c:81:7
 #7 0x00007fe44d6ff40f _nl_load_domain /build/glibc-G5rUEF/glibc-2.29/intl/loadmsgcat.c:1177:9
 #8 0x00007fe44d70cb92 (/lib/x86_64-linux-gnu/libc.so.6+0x32b92)
 #9 0x0000000001a8e8c3 clang::Sema::ActOnStartOfSwitchStmt(clang::SourceLocation, clang::Stmt*, clang::Sema::ConditionResult) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Sema/SemaStmt.cpp:0:0
#10 0x0000000001341be9 clang::Parser::ParseSwitchStatement(clang::SourceLocation*) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseStmt.cpp:1490:15
#11 0x000000000133ed6b clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::Parser::ParsedAttributesWithRange&) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseStmt.cpp:257:12
#12 0x000000000133e3aa clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseStmt.cpp:106:20
#13 0x00000000013463d1 clang::Parser::ParseCompoundStatementBody(bool) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseStmt.cpp:1079:11
#14 0x0000000001347310 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseStmt.cpp:2204:21
#15 0x00000000012a562d clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/Parser.cpp:0:0
#16 0x00000000012c086b clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseDecl.cpp:2069:16
#17 0x00000000012a46b2 clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/Parser.cpp:1109:10
#18 0x00000000012a40f5 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/Parser.cpp:1125:12
#19 0x00000000012a31c0 clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/Parser.cpp:945:12
#20 0x00000000012a0fb6 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, bool) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/Parser.cpp:696:10
#21 0x000000000129c358 clang::ParseAST(clang::Sema&, bool, bool) /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Parse/ParseAST.cpp:157:5
#22 0x00000000010ffd80 clang::FrontendAction::Execute() /usr/local/google/home/sammccall/src/llvm-mono/clang/lib/Frontend/FrontendAction.cpp:944:10
#23 0x0000000000aafaf0 getPtr /usr/local/google/home/sammccall/src/llvm-mono/llvm/include/llvm/Support/Error.h:273:42