clang crash backtrace

GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
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Reading symbols from /opt/clang-3.5/bin/clang...done.
[New LWP 6138]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
(gdb)
Thread 1 (Thread 0x2b66219f7dc0 (LWP 6138)):
#0  0x0000000001289473 in ReadKeyDataLength (d=<synthetic pointer>)
    at PTHLexer.cpp:334
#1  find (InfoPtr=<optimized out>, EKey=<synthetic pointer>,
    this=<optimized out>)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/Support/OnDiskHashTable.h:314
#2  (anonymous namespace)::PTHStatCache::getStat (this=0x241f110,
    Path=0x32dd618 "/usr/bin/../lib/gcc/x86_64-linux-gnu/4.8/include/ctype.h",
    Data=..., isFile=<optimized out>, F=0x7fffa1d35840, FS=...)
    at PTHLexer.cpp:711
#3  0x00000000012ba31d in clang::FileSystemStatCache::get (
    Path=<optimized out>, Data=..., isFile=<optimized out>, F=0x7fffa1d35840,
    Cache=<optimized out>, FS=...) at FileSystemStatCache.cpp:112
#4  0x00000000012b6cbc in grow_pod (TSize=1, MinSizeInBytes=23812,
    this=0x23ee2f8)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/ADT/SmallVector.h:82
#5  grow (MinSize=23812, this=0x23ee2f8)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/ADT/SmallVector.h:326
#6  append<char const*> (in_end=0x182a7f4 "",
    in_start=0x1824af0 "\340\236+\001", this=0x23ee2f8)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/ADT/SmallVector.h:421
#7  SmallVector<char const*> (E=0x182a7f4 "", S=0x1824af0 "\340\236+\001",
    this=0x23ee2f8)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/ADT/SmallVector.h:859
#8  SmallString (S=..., this=0x23ee2f8)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/include/llvm/ADT/SmallString.h:31
#9  clang::FileManager::getStatValue (this=0x23ee170,
    Path=0x1824af0 "\340\236+\001", Data=..., isFile=<optimized out>,
    F=0x7fffa1d35840) at FileManager.cpp:458
#10 0x00000000012b94dd in clang::FileManager::getFile (this=0x23ee170,
    Filename=..., openFile=<optimized out>, CacheFailure=<optimized out>)
    at FileManager.cpp:260
#11 0x000000000123f1fe in clang::DirectoryLookup::LookupFile (
    this=0x2b662569c7e4, Filename=..., HS=..., SearchPath=0x0,
    RelativePath=0x7fffa1d35840, SuggestedModule=0x23ed0f0,
    InUserSpecifiedSystemFramework=@0x7fffa1d36330: false,
    HasBeenMapped=@0x7fffa1d363b0: false, MappedName=...)
    at HeaderSearch.cpp:292
#12 0x000000000123fb3f in clang::HeaderSearch::LookupFile (this=0x23feb80,
    Filename=..., IncludeLoc=..., isAngled=<optimized out>, FromDir=0x0,
    CurDir=@0x7fffa1d36ac8: 0x0, Includers=..., SearchPath=0x0,
    RelativePath=0x0, SuggestedModule=0x0, SkipCache=false)
    at HeaderSearch.cpp:725
#13 0x000000000126b44a in clang::Preprocessor::LookupFile (this=0x23ff2c0,
    FilenameLoc=..., Filename=..., isAngled=<optimized out>,
    FromDir=<optimized out>, CurDir=@0x7fffa1d36ac8: 0x0, SearchPath=0x0,
    RelativePath=0x0, SuggestedModule=0x0, SkipCache=false)
    at PPDirectives.cpp:609
#14 0x0000000001273c94 in clang::Preprocessor::HandleIncludeDirective (
    this=0x23ff2c0, HashLoc=..., IncludeTok=..., LookupFrom=0x0,
    isImport=<optimized out>) at PPDirectives.cpp:1480
#15 0x00000000012770eb in clang::Preprocessor::HandleDirective (
    this=0x23ff2c0, Result=...) at PPDirectives.cpp:765
#16 0x000000000128ab1c in clang::PTHLexer::Lex (this=0x32c4a90, Tok=...)
    at PTHLexer.cpp:122
#17 0x000000000129da47 in clang::Preprocessor::Lex (this=0x23ff2c0, Result=...)
    at Preprocessor.cpp:668
#18 0x00000000008cf59e in clang::Parser::ConsumeBrace (this=0x244c300)
    at /home/ch1010832/Work/debsource/clang-35/llvm-3.5.0.src/tools/clang/lib/Parse/../../include/clang/Parse/Parser.h:408
#19 0x00000000008d1bb6 in clang::BalancedDelimiterTracker::consumeClose (
    this=this@entry=0x7fffa1d37950) at RAIIObjectsForParser.h:424
#20 0x00000000008f3760 in clang::Parser::ParseInnerNamespace (
    this=this@entry=0x244c300, IdentLoc=..., Ident=..., NamespaceLoc=...,
    index=index@entry=0, InlineLoc=..., attrs=..., Tracker=...)
    at ParseDeclCXX.cpp:214
#21 0x00000000008f3e13 in clang::Parser::ParseNamespace (this=0x244c300,
    Context=<optimized out>, DeclEnd=..., InlineLoc=...)
    at ParseDeclCXX.cpp:186
#22 0x00000000008e9140 in clang::Parser::ParseDeclaration (this=0x244c300,
    Stmts=..., Context=0, DeclEnd=..., attrs=...) at ParseDecl.cpp:1329
#23 0x00000000008d4cb4 in clang::Parser::ParseExternalDeclaration (
    this=this@entry=0x244c300, attrs=..., DS=DS@entry=0x0) at Parser.cpp:724
#24 0x00000000008d540c in clang::Parser::ParseTopLevelDecl (this=0x244c300,
    Result=...) at Parser.cpp:559
#25 0x00000000008cf16b in clang::ParseAST (S=..., PrintStats=<optimized out>,
    SkipFunctionBodies=<optimized out>) at ParseAST.cpp:145
#26 0x0000000000741f42 in clang::CodeGenAction::ExecuteAction (this=0x23eb0e0)
    at CodeGenAction.cpp:703
#27 0x00000000005cb8b6 in clang::FrontendAction::Execute (this=0x23eb0e0)
    at FrontendAction.cpp:415
#28 0x00000000005ab8e5 in clang::CompilerInstance::ExecuteAction (
    this=0x23ea270, Act=...) at CompilerInstance.cpp:810
#29 0x0000000000596964 in clang::ExecuteCompilerInvocation (
    Clang=<optimized out>) at ExecuteCompilerInvocation.cpp:222
#30 0x0000000000591b38 in cc1_main (ArgBegin=<optimized out>,
    ArgEnd=<optimized out>, Argv0=<optimized out>, MainAddr=<optimized out>)
    at cc1_main.cpp:112
#31 0x000000000059046f in main (argc_=<optimized out>, argv_=<optimized out>)
    at driver.cpp:319
(gdb) quit