Arch Linux

Description:
Since 3.0-3 clang nothing but segfaults when used with -Wuninitialized (which is a part of -Wall), seemingly regardless of the actual occurrence of the warning; the existance of a variable declaration inside a function seems to be enough. It even fails for the following simple program:

% cat test.c
void nop() {
int i;
}


% clang -Wuninitialized test.c
0 libLLVM-3.0.so 0x00007f66d16643df
1 libLLVM-3.0.so 0x00007f66d1664849
2 libpthread.so.0 0x00007f66d07a8140
3 clang 0x0000000000c01982
4 clang 0x0000000000c02427
5 clang 0x0000000000c0421d clang::runUninitializedVariablesAnalysis(clang::DeclContext const&, clang::CFG const&, clang::AnalysisContext&, clang::UninitVariablesHandler&, clang::UninitVariablesAnalysisStats&) + 1597
6 clang 0x0000000000aa32a2 clang::sema::AnalysisBasedWarnings::IssueWarnings(clang::sema::AnalysisBasedWarnings::Policy, clang::sema::FunctionScopeInfo*, clang::Decl const*, clang::BlockExpr const*) + 914
7 clang 0x00000000008644fc clang::Sema::PopFunctionOrBlockScope(clang::sema::AnalysisBasedWarnings::Policy const*, clang::Decl const*, clang::BlockExpr const*) + 172
8 clang 0x00000000008e09ee clang::Sema::ActOnFinishFunctionBody(clang::Decl*, clang::Stmt*, bool) + 334
9 clang 0x000000000080bc7d clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) + 189
10 clang 0x000000000081ca73 clang::Parser::ParseFunctionDefinition(clang::Parser::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&) + 963
11 clang 0x000000000082a863 clang::Parser::ParseDeclGroup(clang::Parser::ParsingDeclSpec&, unsigned int, bool, clang::SourceLocation*, clang::Parser::ForRangeInit*) + 739
12 clang 0x00000000008184b5 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsingDeclSpec&, clang::AccessSpecifier) + 149
13 clang 0x0000000000818a9d clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::AccessSpecifier) + 717
14 clang 0x000000000081a69b clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::Parser::ParsingDeclSpec*) + 2747
15 clang 0x000000000081abae clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 158
16 clang 0x00000000007f464d clang::ParseAST(clang::Sema&, bool) + 269
17 clang 0x00000000006e6a53 clang::CodeGenAction::ExecuteAction() + 51
18 clang 0x00000000005e9963 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 307
19 clang 0x00000000005d4981 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1041
20 clang 0x00000000005cdfaf cc1_main(char const**, char const**, char const*, void*) + 815
21 clang 0x00000000005ccf6d main + 6957
22 libc.so.6 0x00007f66cff00455 __libc_start_main + 245
23 clang 0x00000000005cdae1
Stack dump:
0. Program arguments: /usr/bin/clang -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name test.c -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version 2.22.0.20120323 -momit-leaf-frame-pointer -resource-dir /usr/bin/../lib/clang/3.0 -fmodule-cache-path /var/tmp/clang-module-cache -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/clang/3.0/include -internal-externc-isystem /usr/include -Wuninitialized -ferror-limit 19 -fmessage-length 319 -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-fragile-abi -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/test-wRGm45.o -x c test.c
1. <eof> parser at end of file
2. test.c:1:12: parsing function body 'nop'
clang: error: unable to execute command: Segmentation fault (core dumped) [err_drv_command_failure]
clang: error: clang frontend command failed due to signal 2 (use -v to see invocation) [err_drv_command_signalled]
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: /tmp/test-2anYAv.i