[llvm-bugs] [Bug 46547] New: Clang crash in clang/lib/Sema/SemaCXXScopeSpec.cpp:371: clang::NamedDecl *clang::Sema::FindFirstQualifierInScope(clang::Scope *, clang::NestedNameSpecifier *): Assertion `!Found.isAmbiguous() && "Cannot handle ambiguities here yet"' failed
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed Jul 1 22:19:06 PDT 2020
https://bugs.llvm.org/show_bug.cgi?id=46547
Bug ID: 46547
Summary: Clang crash in
clang/lib/Sema/SemaCXXScopeSpec.cpp:371:
clang::NamedDecl
*clang::Sema::FindFirstQualifierInScope(clang::Scope
*, clang::NestedNameSpecifier *): Assertion
`!Found.isAmbiguous() && "Cannot handle ambiguities
here yet"' failed
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Keywords: crash-on-invalid
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangbugs at nondot.org
Reporter: haoxintu at gmail.com
CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
richard-llvm at metafoo.co.uk
Hi, there.
This case, bug.cc, reduced by C-Reduce, makes clang-trunk crashed.
$cat bug.cc
inline namespace a {
namespace a {}
}
b = c.a ::d;
$clang++ bug.cc
bug.cc:4:1: error: C++ requires a type specifier for all declarations
b = c.a ::d;
^
clang-11:
/home/haoxin/compilers/llvm-project/clang/lib/Sema/SemaCXXScopeSpec.cpp:371:
clang::NamedDecl *clang::Sema::FindFirstQualifierInScope(clang::Scope *,
clang::NestedNameSpecifier *): Assertion `!Found.isAmbiguous() && "Cannot
handle ambiguities here yet"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/home/haoxin/compilers/llvm-project/build/bin/clang-11 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
bug.cc -mrelocation-model static -mframe-pointer=all -fmath-errno
-fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64
-dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir
/home/haoxin/compilers/llvm-project/build/lib/clang/11.0.0 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward
-internal-isystem /usr/local/include -internal-isystem
/home/haoxin/compilers/llvm-project/build/lib/clang/11.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fdeprecated-macro -fdebug-compilation-dir
/home/haoxin/bitbucket/scg-backup-bitbucket/ice-test/4/creduce -ferror-limit 19
-fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics
-faddrsig -o /tmp/bug-358bb6.o -x c++ bug.cc
1. bug.cc:4:12: current parser token ';'
#0 0x00000000026f36c4 PrintStackTraceSignalHandler(void*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x26f36c4)
#1 0x00000000026f12be llvm::sys::RunSignalHandlers()
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x26f12be)
#2 0x00000000026f39e5 SignalHandler(int)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x26f39e5)
#3 0x00007fc8734f8890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007fc871f56e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007fc871f58801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007fc871f4839a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007fc871f48412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x0000000003f031ba clang::Sema::FindFirstQualifierInScope(clang::Scope*,
clang::NestedNameSpecifier*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3f031ba)
#9 0x000000000431888f clang::Sema::ActOnMemberAccessExpr(clang::Scope*,
clang::Expr*, clang::SourceLocation, clang::tok::TokenKind,
clang::CXXScopeSpec&, clang::SourceLocation, clang::UnqualifiedId&,
clang::Decl*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x431888f)
#10 0x0000000003e3786b
clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*,
true>) (/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3e3786b)
#11 0x0000000003e39f72
clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&,
clang::Parser::TypeCastState, bool, bool*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3e39f72)
#12 0x0000000003e349b9
clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3e349b9)
#13 0x0000000003e0d1b5
clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3e0d1b5)
#14 0x0000000003e0b034 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&,
clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3e0b034)
#15 0x0000000003def8fc
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3def8fc)
#16 0x0000000003def395
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3def395)
#17 0x0000000003dee1bf
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3dee1bf)
#18 0x0000000003dec28d
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, bool)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3dec28d)
#19 0x0000000003de770d clang::ParseAST(clang::Sema&, bool, bool)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x3de770d)
#20 0x0000000002ebc3f3 clang::FrontendAction::Execute()
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x2ebc3f3)
#21 0x0000000002e539c3
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x2e539c3)
#22 0x0000000002f67532
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x2f67532)
#23 0x000000000095d060 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x95d060)
#24 0x000000000095b12c ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x95b12c)
#25 0x000000000095addf main
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x95addf)
#26 0x00007fc871f39b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#27 0x0000000000957eba _start
(/home/haoxin/compilers/llvm-project/build/bin/clang-11+0x957eba)
clang-11: error: unable to execute command: Aborted (core dumped)
clang-11: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 11.0.0 (https://github.com/llvm/llvm-project
b9306fd042ce1c11d84f05d2124dfdc65b8331fe)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/haoxin/compilers/llvm-project/build/bin
clang-11: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-11: note: diagnostic msg: /tmp/bug-2a2442.cpp
clang-11: note: diagnostic msg: /tmp/bug-2a2442.sh
clang-11: note: diagnostic msg:
********************
$clang++ -v
clang version 11.0.0 (https://github.com/llvm/llvm-project
b9306fd042ce1c11d84f05d2124dfdc65b8331fe)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/haoxin/compilers/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Candidate multilib: .;@m64
Selected multilib: .;@m64
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