[llvm-bugs] [Bug 46986] New: Clang crashed in clang/lib/Sema/SemaDeclCXX.cpp:11896 Assertion `!SS.isInvalid() && "Invalid CXXScopeSpec."' failed
via llvm-bugs
llvm-bugs at lists.llvm.org
Tue Aug 4 08:37:15 PDT 2020
https://bugs.llvm.org/show_bug.cgi?id=46986
Bug ID: 46986
Summary: Clang crashed in clang/lib/Sema/SemaDeclCXX.cpp:11896
Assertion `!SS.isInvalid() && "Invalid CXXScopeSpec."'
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, all.
This small invalid code makes Clang-6.0 onwards versions crashed.
Input:
//small.cc
enum var1;
using var1 :: operator & <>;
Command:
clang++ small.cc
Output in trunk:
small.cc:1:6: error: ISO C++ forbids forward references to 'enum' types
enum var1;
^
small.cc:2:7: error: incomplete type 'var1' named in nested name specifier
using var1 :: operator & <>;
^~~~~~~
small.cc:1:6: note: forward declaration of 'var1'
enum var1;
^
clang-12:
/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/clang/lib/Sema/SemaDeclCXX.cpp:11896:
clang::NamedDecl *clang::Sema::BuildUsingDeclaration(clang::Scope *,
clang::AccessSpecifier, clang::SourceLocation, bool, clang::SourceLocation,
clang::CXXScopeSpec &, clang::DeclarationNameInfo, clang::SourceLocation, const
clang::ParsedAttributesView &, bool): Assertion `!SS.isInvalid() && "Invalid
CXXScopeSpec."' 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/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
-main-file-name small.cc -mrelocation-model static -mframe-pointer=all
-fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables
-target-cpu x86-64 -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir
/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/lib/clang/12.0.0
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/x86_64-linux-gnu/c++/5.4.0
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/x86_64-linux-gnu/c++/5.4.0
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/backward
-internal-isystem /usr/local/include -internal-isystem
/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/lib/clang/12.0.0/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/test/clang-bug
-ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions
-fcolor-diagnostics -faddrsig -o /tmp/small-4e8e14.o -x c++ small.cc
1. small.cc:2:26: current parser token '<'
#0 0x0000000002758f44 PrintStackTraceSignalHandler(void*)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2758f44)
#1 0x0000000002756b4e llvm::sys::RunSignalHandlers()
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2756b4e)
#2 0x0000000002759265 SignalHandler(int)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2759265)
#3 0x00007fcf6ee21390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x00007fcf6d98b438 raise
/build/glibc-e6zv40/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0
#5 0x00007fcf6d98d03a abort /build/glibc-e6zv40/glibc-2.23/stdlib/abort.c:91:0
#6 0x00007fcf6d983be7 __assert_fail_base
/build/glibc-e6zv40/glibc-2.23/assert/assert.c:92:0
#7 0x00007fcf6d983c92 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc92)
#8 0x00000000042cf8e1 clang::Sema::BuildUsingDeclaration(clang::Scope*,
clang::AccessSpecifier, clang::SourceLocation, bool, clang::SourceLocation,
clang::CXXScopeSpec&, clang::DeclarationNameInfo, clang::SourceLocation,
clang::ParsedAttributesView const&, bool)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x42cf8e1)
#9 0x00000000042cd957 clang::Sema::ActOnUsingDeclaration(clang::Scope*,
clang::AccessSpecifier, clang::SourceLocation, clang::SourceLocation,
clang::CXXScopeSpec&, clang::UnqualifiedId&, clang::SourceLocation,
clang::ParsedAttributesView const&)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x42cd957)
#10 0x0000000003ff79f7
clang::Parser::ParseUsingDeclaration(clang::DeclaratorContext,
clang::Parser::ParsedTemplateInfo const&, clang::SourceLocation,
clang::SourceLocation&, clang::AccessSpecifier)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3ff79f7)
#11 0x0000000003ff6d6e
clang::Parser::ParseUsingDirectiveOrDeclaration(clang::DeclaratorContext,
clang::Parser::ParsedTemplateInfo const&, clang::SourceLocation&,
clang::Parser::ParsedAttributesWithRange&)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3ff6d6e)
#12 0x0000000003fdb966
clang::Parser::ParseDeclaration(clang::DeclaratorContext,
clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&,
clang::SourceLocation*)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3fdb966)
#13 0x0000000003fc35ba
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3fc35ba)
#14 0x0000000003fc1f7d
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, bool)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3fc1f7d)
#15 0x0000000003fbd29d clang::ParseAST(clang::Sema&, bool, bool)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x3fbd29d)
#16 0x0000000002f2a393 clang::FrontendAction::Execute()
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2f2a393)
#17 0x0000000002ec4ea3
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2ec4ea3)
#18 0x0000000002fd43b2
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x2fd43b2)
#19 0x0000000000983453 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x983453)
#20 0x00000000009818ec ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x9818ec)
#21 0x0000000000981594 main
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x981594)
#22 0x00007fcf6d976840 __libc_start_main
/build/glibc-e6zv40/glibc-2.23/csu/../csu/libc-start.c:325:0
#23 0x000000000097e5a9 _start
(/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin/clang-12+0x97e5a9)
clang-12: error: unable to execute command: Aborted (core dumped)
clang-12: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 12.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/haoxin/corpus-compilers/llvm-trunk/llvm-project-master/build/bin
clang-12: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-12: note: diagnostic msg: /tmp/small-b3941e.cpp
clang-12: note: diagnostic msg: /tmp/small-b3941e.sh
clang-12: note: diagnostic msg:
********************
Thanks,
Haoxin
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