https://llvm.org/bugs/show_bug.cgi?id=28478
Bug ID: 28478
Summary: clang crashes on invalid C++ code:
`(!isa<TagDecl>(LookupCtx) ||
LookupCtx->isDependentContext() ||
cast<TagDecl>(LookupCtx)->isCompleteDefinition() ||
cast<TagDecl>(LookupCtx)->isBeingDefined()) &&
"Declaration context must already be complete!"'
failed
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: s...@cs.ucdavis.edu
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
The current clang trunk crashes without giving any diagnostics when compiling
the following C++ test case on x86_64-linux-gnu in both 32-bit and 64-bit
modes.
This is a regression from 3.8.x.
$ clang++ -v
clang version 3.9.0 (trunk 274832)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.1.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clang++ -c small.cpp
clang-3.9:
/tmp/llvm-builder/llvm-source-trunk/tools/clang/lib/Sema/SemaLookup.cpp:1990:
bool clang::Sema::LookupQualifiedName(clang::LookupResult&,
clang::DeclContext*, bool): Assertion `(!isa<TagDecl>(LookupCtx) ||
LookupCtx->isDependentContext() ||
cast<TagDecl>(LookupCtx)->isCompleteDefinition() ||
cast<TagDecl>(LookupCtx)->isBeingDefined()) && "Declaration context must
already be complete!"' failed.
#0 0x0000000001d579f5 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang-3.9+0x1d579f5)
#1 0x0000000001d55aae llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang-3.9+0x1d55aae)
#2 0x0000000001d55c10 SignalHandler(int)
(/usr/local/clang-trunk/bin/clang-3.9+0x1d55c10)
#3 0x00007f717ec72340 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x00007f717da63cc9 gsignal
/build/eglibc-3GlaMS/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f717da670d8 abort
/build/eglibc-3GlaMS/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f717da5cb86 __assert_fail_base
/build/eglibc-3GlaMS/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f717da5cc32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x0000000002ce4362 clang::Sema::LookupQualifiedName(clang::LookupResult&,
clang::DeclContext*, bool) [clone .part.1297]
(/usr/local/clang-trunk/bin/clang-3.9+0x2ce4362)
#9 0x0000000002c4ff62 clang::Sema::getDestructorName(clang::SourceLocation,
clang::IdentifierInfo&, clang::SourceLocation, clang::Scope*,
clang::CXXScopeSpec&, clang::OpaquePtr<clang::QualType>, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2c4ff62)
#10 0x0000000002895098 clang::Parser::ParseUnqualifiedId(clang::CXXScopeSpec&,
bool, bool, bool, clang::OpaquePtr<clang::QualType>, clang::SourceLocation&,
clang::UnqualifiedId&) (/usr/local/clang-trunk/bin/clang-3.9+0x2895098)
#11 0x00000000028954dd
clang::Parser::tryParseCXXIdExpression(clang::CXXScopeSpec&, bool,
clang::Token&) (/usr/local/clang-trunk/bin/clang-3.9+0x28954dd)
#12 0x0000000002895657 clang::Parser::ParseCXXIdExpression(bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2895657)
#13 0x000000000287e8dc clang::Parser::ParseCastExpression(bool, bool, bool&,
clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x287e8dc)
#14 0x000000000288144d clang::Parser::ParseCastExpression(bool, bool,
clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x288144d)
#15 0x00000000028814d9
clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState)
(/usr/local/clang-trunk/bin/clang-3.9+0x28814d9)
#16 0x0000000002881559
clang::Parser::ParseExpression(clang::Parser::TypeCastState)
(/usr/local/clang-trunk/bin/clang-3.9+0x2881559)
#17 0x00000000028c26f6 clang::Parser::ParseExprStatement()
(/usr/local/clang-trunk/bin/clang-3.9+0x28c26f6)
#18 0x00000000028bfb97
clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*,
32u>&, clang::Parser::AllowedContsructsKind, clang::SourceLocation*,
clang::Parser::ParsedAttributesWithRange&)
(/usr/local/clang-trunk/bin/clang-3.9+0x28bfb97)
#19 0x00000000028bfcfe
clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*,
32u>&, clang::Parser::AllowedContsructsKind, clang::SourceLocation*)
(/usr/local/clang-trunk/bin/clang-3.9+0x28bfcfe)
#20 0x00000000028c4559 clang::Parser::ParseCompoundStatementBody(bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x28c4559)
#21 0x00000000028c6db9 clang::Parser::ParseFunctionStatementBody(clang::Decl*,
clang::Parser::ParseScope&) (/usr/local/clang-trunk/bin/clang-3.9+0x28c6db9)
#22 0x000000000284522b
clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*)
(/usr/local/clang-trunk/bin/clang-3.9+0x284522b)
#23 0x000000000286519d clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&,
unsigned int, clang::SourceLocation*, clang::Parser::ForRangeInit*)
(/usr/local/clang-trunk/bin/clang-3.9+0x286519d)
#24 0x0000000002840e4d
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
(/usr/local/clang-trunk/bin/clang-3.9+0x2840e4d)
#25 0x00000000028414f1
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier) [clone .part.222]
(/usr/local/clang-trunk/bin/clang-3.9+0x28414f1)
#26 0x000000000284152f
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier)
(/usr/local/clang-trunk/bin/clang-3.9+0x284152f)
#27 0x00000000028463a0
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) (/usr/local/clang-trunk/bin/clang-3.9+0x28463a0)
#28 0x0000000002846b70
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/local/clang-trunk/bin/clang-3.9+0x2846b70)
#29 0x000000000283e19b clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x283e19b)
#30 0x00000000024d7cfe clang::CodeGenAction::ExecuteAction()
(/usr/local/clang-trunk/bin/clang-3.9+0x24d7cfe)
#31 0x00000000021e2d6e clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang-3.9+0x21e2d6e)
#32 0x00000000021b81b6
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang-3.9+0x21b81b6)
#33 0x0000000002270272
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang-3.9+0x2270272)
#34 0x0000000000b09678 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/clang-trunk/bin/clang-3.9+0xb09678)
#35 0x0000000000ab930c main (/usr/local/clang-trunk/bin/clang-3.9+0xab930c)
#36 0x00007f717da4eec5 __libc_start_main
/build/eglibc-3GlaMS/eglibc-2.19/csu/libc-start.c:321:0
#37 0x0000000000b056e4 _start (/usr/local/clang-trunk/bin/clang-3.9+0xb056e4)
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang-3.9 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
small.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim
-fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables
-fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb
-coverage-file /data2/small.cpp -resource-dir
/usr/local/clang-trunk/bin/../lib/clang/3.9.0 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.9.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -fdeprecated-macro
-fdebug-compilation-dir /data2 -ferror-limit 19 -fmessage-length 133
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -o small.o -x c++ small.cpp
1. small.cpp:5:9: current parser token '('
2. small.cpp:4:1: parsing function body 'foo'
3. small.cpp:4:1: in compound statement ('{}')
clang-3.9: error: unable to execute command: Aborted (core dumped)
clang-3.9: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.9.0 (trunk 274832)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
clang-3.9: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang-3.9: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.9: note: diagnostic msg: /tmp/small-a90bfb.cpp
clang-3.9: note: diagnostic msg: /tmp/small-a90bfb.sh
clang-3.9: note: diagnostic msg:
********************
$
----------------------
class A;
void foo ()
{
A::~A ();
}
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