https://llvm.org/bugs/show_bug.cgi?id=28105
Bug ID: 28105
Summary: clang crashes on C++ code with invalid default
argument for constructor: Assertion `Val && "isa<>
used on a null pointer"' 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 when compiling the following C++ test case on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It also affects 3.5.x and later, and is rejected by 3.4.x.
$ clang++ -v
clang version 3.9.0 (trunk 272507)
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/5.3.0
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/5.3.0
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/include/llvm/Support/Casting.h:95: static
bool llvm::isa_impl_cl<To, const From*>::doit(const From*) [with To =
clang::ExprWithCleanups; From = clang::Expr]: Assertion `Val && "isa<> used on
a null pointer"' failed.
#0 0x0000000001e23f35 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang-3.9+0x1e23f35)
#1 0x0000000001e21dc6 llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang-3.9+0x1e21dc6)
#2 0x0000000001e21fe4 SignalHandler(int)
(/usr/local/clang-trunk/bin/clang-3.9+0x1e21fe4)
#3 0x00007fc9f547b340 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x00007fc9f4699cc9 gsignal
/build/eglibc-3GlaMS/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007fc9f469d0d8 abort
/build/eglibc-3GlaMS/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007fc9f4692b86 __assert_fail_base
/build/eglibc-3GlaMS/eglibc-2.19/assert/assert.c:92:0
#7 0x00007fc9f4692c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x00000000009c6c98 llvm::cast_retty<clang::ExprWithCleanups,
clang::Expr*>::ret_type llvm::cast<clang::ExprWithCleanups,
clang::Expr>(clang::Expr*) [clone .part.3611]
(/usr/local/clang-trunk/bin/clang-3.9+0x9c6c98)
#9 0x0000000002d059a1
clang::Sema::BuildCXXDefaultArgExpr(clang::SourceLocation,
clang::FunctionDecl*, clang::ParmVarDecl*)
(/usr/local/clang-trunk/bin/clang-3.9+0x2d059a1)
#10 0x0000000002d0ad96
clang::Sema::GatherArgumentsForCall(clang::SourceLocation,
clang::FunctionDecl*, clang::FunctionProtoType const*, unsigned int,
llvm::ArrayRef<clang::Expr*>, llvm::SmallVectorImpl<clang::Expr*>&,
clang::Sema::VariadicCallType, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2d0ad96)
#11 0x0000000002c4eaaf
clang::Sema::CompleteConstructorCall(clang::CXXConstructorDecl*,
llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation,
llvm::SmallVectorImpl<clang::Expr*>&, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2c4eaaf)
#12 0x0000000002db30aa clang::InitializationSequence::Perform(clang::Sema&,
clang::InitializedEntity const&, clang::InitializationKind const&,
llvm::MutableArrayRef<clang::Expr*>, clang::QualType*)
(/usr/local/clang-trunk/bin/clang-3.9+0x2db30aa)
#13 0x0000000002c4a158
clang::Sema::SetParamDefaultArgument(clang::ParmVarDecl*, clang::Expr*,
clang::SourceLocation) (/usr/local/clang-trunk/bin/clang-3.9+0x2c4a158)
#14 0x0000000002c578e4 clang::Sema::ActOnParamDefaultArgument(clang::Decl*,
clang::SourceLocation, clang::Expr*)
(/usr/local/clang-trunk/bin/clang-3.9+0x2c578e4)
#15 0x0000000002943880
clang::Parser::ParseLexedMethodDeclaration(clang::Parser::LateParsedMethodDeclaration&)
(/usr/local/clang-trunk/bin/clang-3.9+0x2943880)
#16 0x000000000293e896
clang::Parser::ParseLexedMethodDeclarations(clang::Parser::ParsingClass&)
(/usr/local/clang-trunk/bin/clang-3.9+0x293e896)
#17 0x000000000296f86a
clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation,
clang::SourceLocation, clang::Parser::ParsedAttributesWithRange&, unsigned int,
clang::Decl*) (/usr/local/clang-trunk/bin/clang-3.9+0x296f86a)
#18 0x00000000029705bf
clang::Parser::ParseClassSpecifier(clang::tok::TokenKind,
clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo
const&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext,
clang::Parser::ParsedAttributesWithRange&)
(/usr/local/clang-trunk/bin/clang-3.9+0x29705bf)
#19 0x0000000002953232
clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&,
clang::Parser::ParsedTemplateInfo const&, clang::AccessSpecifier,
clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*)
(/usr/local/clang-trunk/bin/clang-3.9+0x2953232)
#20 0x0000000002936e04
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
(/usr/local/clang-trunk/bin/clang-3.9+0x2936e04)
#21 0x0000000002937561
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier) [clone .part.222]
(/usr/local/clang-trunk/bin/clang-3.9+0x2937561)
#22 0x000000000293759f
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier)
(/usr/local/clang-trunk/bin/clang-3.9+0x293759f)
#23 0x000000000293c350
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) (/usr/local/clang-trunk/bin/clang-3.9+0x293c350)
#24 0x000000000293cb20
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/local/clang-trunk/bin/clang-3.9+0x293cb20)
#25 0x0000000002934140 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2934140)
#26 0x00000000025d01fe clang::CodeGenAction::ExecuteAction()
(/usr/local/clang-trunk/bin/clang-3.9+0x25d01fe)
#27 0x000000000229a76e clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang-3.9+0x229a76e)
#28 0x00000000022700e6
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang-3.9+0x22700e6)
#29 0x00000000023284c2
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang-3.9+0x23284c2)
#30 0x0000000000aeef38 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/clang-trunk/bin/clang-3.9+0xaeef38)
#31 0x0000000000aa3134 main (/usr/local/clang-trunk/bin/clang-3.9+0xaa3134)
#32 0x00007fc9f4684ec5 __libc_start_main
/build/eglibc-3GlaMS/eglibc-2.19/csu/libc-start.c:321:0
#33 0x0000000000aeafa4 _start (/usr/local/clang-trunk/bin/clang-3.9+0xaeafa4)
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 147
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -o small.o -x c++ small.cpp
1. <eof> parser at end of file
2. small.cpp:1:1: parsing struct/union/class body 'A'
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 272507)
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-a58722.cpp
clang-3.9: note: diagnostic msg: /tmp/small-a58722.sh
clang-3.9: note: diagnostic msg:
********************
$
-------------------------------------------------
struct A
{
A (int = 0, int = 0, A = 0); // should be: A (int = 0, int = 0, A * = 0);
};
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