clang crashes while building wxwidgets 2.9.2

[llvmbot]

Bugzilla Link	11043
Resolution	FIXED
Resolved on	Feb 10, 2012 12:49
Version	trunk
OS	All
Attachments	preprocessed file
Reporter	LLVM Bugzilla Contributor
CC	@efriedma-quic,@tkremenek,@vadz

Extended Description

While building wxwidgets 2.9.2, clang crashes giving the following output:

clang: error: unable to execute command: Segmentation fault: 11 (core dumped)
clang: error: clang frontend command failed due to signal 2 (use -v to see invocation)
clang: note: diagnostic msg: Please submit a bug report to http://llvm.org/bugs/ and include command line arguments and all diagnostic information.
clang: note: diagnostic msg: Preprocessed source(s) are located at:
clang: note: diagnostic msg: /var/folders/4v/d7vjg23d50n_q4q8lm2l37tc0000gn/T/dcbase-BwbKsH.ii

Attached is the preprocessed source (bzip2'ed).
LLVM/Clang SVN revision: 140846

[efriedma-quic]

I'm having trouble reproducing... can you show all of the diagnostic output?

[llvmbot]

I'm having trouble reproducing... can you show all of the diagnostic output?

/Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/wxWidgets-2.9.2/bk-deps clang++ -mmacosx-version-min=10.5 -v -c -o coredll_dcbase.o -I./.pch/wxprec_coredll -D__WXOSX_COCOA__ -DWXBUILDING -I./src/regex -DWXUSINGDLL -DWXMAKINGDLL_CORE -DwxUSE_BASE=0 -dynamic -fPIC -DPIC -Wall -Wundef -Wunused-parameter -Wno-ctor-dtor-privacy -Woverloaded-virtual -Wno-deprecated-declarations -D_FILE_OFFSET_BITS=64 -I/Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/wxWidgets-2.9.2/lib/wx/include/osx_cocoa-unicode-2.9 -I./include -isysroot /Developer/SDKs/MacOSX10.7.sdk -I/usr/pkg/include -I/usr/include -DWX_PRECOMP -pipe -march=core2 -isysroot /Developer/SDKs/MacOSX10.7.sdk -O2 -pipe -fomit-frame-pointer -fno-stack-protector -fstrict-aliasing -I/usr/pkg/include -I/usr/include -fno-common -fvisibility=hidden -fvisibility-inlines-hidden ./src/common/dcbase.cpp
clang version 3.0 (trunk)
Target: x86_64-apple-darwin11.1.0
Thread model: posix
clang: warning: argument unused during compilation: '-no-cpp-precomp'
"/usr/pkg/bin/clang" -cc1 -triple x86_64-apple-macosx10.5.0 -emit-obj -disable-free -disable-llvm-verifier -main-file-name dcbase.cpp -pic-level 2 -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 127.2 -v -coverage-file coredll_dcbase.o -resource-dir /usr/pkg/bin/../lib/clang/3.0 -dependency-file coredll_dcbase.d -MT coredll_dcbase.o -isysroot /Developer/SDKs/MacOSX10.7.sdk -isysroot /Developer/SDKs/MacOSX10.7.sdk -D WXOSX_COCOA -D WXBUILDING -D WXUSINGDLL -D WXMAKINGDLL_CORE -D wxUSE_BASE=0 -D PIC -D _FILE_OFFSET_BITS=64 -D WX_PRECOMP -I ./.pch/wxprec_coredll -I ./src/regex -I /Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/wxWidgets-2.9.2/lib/wx/include/osx_cocoa-unicode-2.9 -I ./include -I /Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/.buildlink/include -fmodule-cache-path /var/folders/4v/d7vjg23d50n_q4q8lm2l37tc0000gn/T/clang-module-cache -O2 -Wall -Wundef -Wunused-parameter -Wno-ctor-dtor-privacy -Woverloaded-virtual -Wno-deprecated-declarations -fdeprecated-macro -ferror-limit 19 -fmessage-length 80 -fvisibility hidden -fvisibility-inlines-hidden -fblocks -fblocks-runtime-optional -fobjc-dispatch-method=non-legacy -fcxx-exceptions -fexceptions -fno-common -fdiagnostics-show-option -fcolor-diagnostics -o coredll_dcbase.o -x c++ ./src/common/dcbase.cpp
clang -cc1 version 3.0 based upon llvm 3.0svn hosted on x86_64-apple-darwin11.1.0
ignoring nonexistent directory "/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.2.1/i686-apple-darwin10/x86_64"
ignoring nonexistent directory "/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.0.0"
ignoring nonexistent directory "/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.0.0/i686-apple-darwin8/"
ignoring nonexistent directory "/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.0.0/backward"
#include "..." search starts here:
#include <...> search starts here:
./.pch/wxprec_coredll
./src/regex
/Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/wxWidgets-2.9.2/lib/wx/include/osx_cocoa-unicode-2.9
./include
/Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/.buildlink/include
/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.2.1
/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.2.1/backward
/Developer/SDKs/MacOSX10.7.sdk/usr/local/include
/usr/pkg/bin/../lib/clang/3.0/include
/Developer/SDKs/MacOSX10.7.sdk/usr/include
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks (framework directory)
/Developer/SDKs/MacOSX10.7.sdk/Library/Frameworks (framework directory)
End of search list.
0 clang 0x000000010ebd2b4f llvm::SmallVectorImpl<llvm_regmatch_t>::resize(unsigned int) + 777
1 clang 0x000000010de3ce89 llvm::StringMapEntryclang::IdentifierInfo*& llvm::StringMap<clang::IdentifierInfo*, llvm::BumpPtrAllocator>::GetOrCreateValueclang::IdentifierInfo*(llvm::StringRef, clang::IdentifierInfo*) + 41
Stack dump:
0. Program arguments: /usr/pkg/bin/clang -cc1 -triple x86_64-apple-macosx10.5.0 -emit-obj -disable-free -disable-llvm-verifier -main-file-name dcbase.cpp -pic-level 2 -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 127.2 -v -coverage-file coredll_dcbase.o -resource-dir /usr/pkg/bin/../lib/clang/3.0 -dependency-file coredll_dcbase.d -MT coredll_dcbase.o -isysroot /Developer/SDKs/MacOSX10.7.sdk -isysroot /Developer/SDKs/MacOSX10.7.sdk -D WXOSX_COCOA -D WXBUILDING -D WXUSINGDLL -D WXMAKINGDLL_CORE -D wxUSE_BASE=0 -D PIC -D _FILE_OFFSET_BITS=64 -D WX_PRECOMP -I ./.pch/wxprec_coredll -I ./src/regex -I /Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/wxWidgets-2.9.2/lib/wx/include/osx_cocoa-unicode-2.9 -I ./include -I /Volumes/Data/dist/pkgsrc/adam/wxWidgets/work/.buildlink/include -fmodule-cache-path /var/folders/4v/d7vjg23d50n_q4q8lm2l37tc0000gn/T/clang-module-cache -O2 -Wall -Wundef -Wunused-parameter -Wno-ctor-dtor-privacy -Woverloaded-virtual -Wno-deprecated-declarations -fdeprecated-macro -ferror-limit 19 -fmessage-length 80 -fvisibility hidden -fvisibility-inlines-hidden -fblocks -fblocks-runtime-optional -fobjc-dispatch-method=non-legacy -fcxx-exceptions -fexceptions -fno-common -fdiagnostics-show-option -fcolor-diagnostics -o coredll_dcbase.o -x c++ ./src/common/dcbase.cpp

1. ./src/common/dcbase.cpp:1126:1: current parser token 'void'
2. ./src/common/dcbase.cpp:1063:1: parsing function body 'DoGradientFillConcentric'
   clang: error: unable to execute command: Segmentation fault: 11
   clang: error: clang frontend command failed due to signal 2 (use -v to see invocation)
   clang: note: diagnostic msg: Please submit a bug report to http://llvm.org/bugs/ and include command line arguments and all diagnostic information.
   clang: note: diagnostic msg: Preprocessed source(s) are located at:
   clang: note: diagnostic msg: /var/folders/4v/d7vjg23d50n_q4q8lm2l37tc0000gn/T/dcbase-Gsv2C7.ii
   *** Error code 254

[efriedma-quic]

Okay... got it; it's a -Wuninitialized bug.

[efriedma-quic]

Reduced testcase:

class wxScopeGuardImplBase {
protected:
~wxScopeGuardImplBase();
};
class VariableSetterBase : public wxScopeGuardImplBase {};
class VariableSetterImpl : public VariableSetterBase {
public:
~VariableSetterImpl();
};
VariableSetterImpl wxMakeVarSetter();
void DoGradientFillLinear() {
const VariableSetterBase& wxVarSetter1066 = wxMakeVarSetter();
}

Crashes under "-Wuninitialized -fsyntax-only".

[tkremenek]

cloned to rdar://problem/10398199

[vadz]

FWIW this is not Mac-specific, I get very similar errors using clang++ from Debian unstable:

% clang++ -v
Debian clang version 3.0-5 (tags/RELEASE_30/final) (based on LLVM 3.0)
Target: x86_64-pc-linux-gnu
Thread model: posix

with wxWidgets 2.9.3.

Somehow it looks that clang is confused by "wxON_BLOCK_EXIT_SET" macro and doesn't correctly determine the end of the function.

It would be great if this could be fixed, we're looking forward to adding clang to the list of compilers supported by wxWidgets. TIA!

[tkremenek]

I'm sorry, this should have been marked fixed. It was fixed in r144646.