[LLVMbugs] [Bug 21381] New: Lex: Crashing during macro expansion

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21381

            Bug ID: 21381
           Summary: Lex: Crashing during macro expansion
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

consider:
#define M(x) f x
M(0 {, })

run with:
~/llvm/Debug+Asserts/bin/clang -cc1 t.cpp -fsyntax-only

this results in:
#2  0x00007ffff6bd5a76 in __assert_fail_base (fmt=0x7ffff6d27370 "%s%s%s:%u:
%s%sAssertion `%s' failed.\n%n", assertion=assertion at entry=0x4a2eca0 "0 &&
\"Invalid SLocOffset or bad function choice\"", file=file at entry=0x4a2e518
"~/llvm/src/tools/clang/lib/Basic/SourceManager.cpp", line=line at entry=0x336,
function=function at entry=0x4a32a20
<clang::SourceManager::getFileIDLoaded(unsigned int)
const::__PRETTY_FUNCTION__> "clang::FileID
clang::SourceManager::getFileIDLoaded(unsigned int) const") at assert.c:92
#3  0x00007ffff6bd5b22 in __GI___assert_fail (assertion=0x4a2eca0 "0 &&
\"Invalid SLocOffset or bad function choice\"", file=0x4a2e518
"~/llvm/src/tools/clang/lib/Basic/SourceManager.cpp", line=0x336,
function=0x4a32a20 <clang::SourceManager::getFileIDLoaded(unsigned int)
const::__PRETTY_FUNCTION__> "clang::FileID
clang::SourceManager::getFileIDLoaded(unsigned int) const") at assert.c:101
#4  0x00000000022e3931 in clang::SourceManager::getFileIDLoaded
(this=0x67b8070, SLocOffset=0x2719) at
~/llvm/src/tools/clang/lib/Basic/SourceManager.cpp:822
#5  0x00000000022e362a in clang::SourceManager::getFileIDSlow (this=0x67b8070,
SLocOffset=0x2719) at ~/llvm/src/tools/clang/lib/Basic/SourceManager.cpp:721
#6  0x00000000022de460 in clang::SourceManager::getFileID (this=0x67b8070,
SpellingLoc=...) at
~/llvm/src/tools/clang/include/clang/Basic/SourceManager.h:975
#7  0x00000000022e43ee in
clang::SourceManager::isAtEndOfImmediateMacroExpansion (this=0x67b8070,
Loc=..., MacroEnd=0x7fffffffbc90) at
~/llvm/src/tools/clang/lib/Basic/SourceManager.cpp:1058
#8  0x0000000003e39c83 in clang::Lexer::isAtEndOfMacroExpansion (loc=...,
SM=..., LangOpts=..., MacroEnd=0x7fffffffbcc0) at
~/llvm/src/tools/clang/lib/Lex/Lexer.cpp:822
#9  0x0000000003e39a86 in clang::Lexer::getLocForEndOfToken (Loc=...,
Offset=0x0, SM=..., LangOpts=...) at
~/llvm/src/tools/clang/lib/Lex/Lexer.cpp:772
#10 0x0000000002b32e95 in clang::Preprocessor::getLocForEndOfToken
(this=0x67b8a90, Loc=..., Offset=0x0) at
~/llvm/src/tools/clang/include/clang/Lex/Preprocessor.h:1150
#11 0x00000000030d654d in clang::Parser::ExpectAndConsume (this=0x6806360,
ExpectedTok=clang::tok::semi, DiagID=0x415, Msg=...) at
~/llvm/src/tools/clang/lib/Parse/Parser.cpp:138
#12 0x00000000030d68fe in clang::Parser::ExpectAndConsumeSemi (this=0x6806360,
DiagID=0x415) at ~/llvm/src/tools/clang/lib/Parse/Parser.cpp:176
#13 0x00000000030ea602 in clang::Parser::ParseDeclGroup (this=0x6806360,
DS=..., Context=0x0, AllowFunctionDefinitions=0x1, DeclEnd=0x0, FRI=0x0) at
~/llvm/src/tools/clang/lib/Parse/ParseDecl.cpp:1715
#14 0x00000000030d924f in clang::Parser::ParseDeclOrFunctionDefInternal
(this=0x6806360, attrs=..., DS=..., AS=clang::AS_none) at
~/llvm/src/tools/clang/lib/Parse/Parser.cpp:894
#15 0x00000000030d933f in clang::Parser::ParseDeclarationOrFunctionDefinition
(this=0x6806360, attrs=..., DS=0x0, AS=clang::AS_none) at
~/llvm/src/tools/clang/lib/Parse/Parser.cpp:910
#16 0x00000000030d8b26 in clang::Parser::ParseExternalDeclaration
(this=0x6806360, attrs=..., DS=0x0) at
~/llvm/src/tools/clang/lib/Parse/Parser.cpp:768
#17 0x00000000030d8179 in clang::Parser::ParseTopLevelDecl (this=0x6806360,
Result=...) at ~/llvm/src/tools/clang/lib/Parse/Parser.cpp:569
#18 0x00000000030d176b in clang::ParseAST (S=..., PrintStats=0x0,
SkipFunctionBodies=0x0) at ~/llvm/src/tools/clang/lib/Parse/ParseAST.cpp:135
#19 0x00000000023d7574 in clang::ASTFrontendAction::ExecuteAction
(this=0x67b6da0) at ~/llvm/src/tools/clang/lib/Frontend/FrontendAction.cpp:533
#20 0x00000000023d704f in clang::FrontendAction::Execute (this=0x67b6da0) at
~/llvm/src/tools/clang/lib/Frontend/FrontendAction.cpp:434
#21 0x00000000023a000a in clang::CompilerInstance::ExecuteAction
(this=0x67b5f10, Act=...) at
~/llvm/src/tools/clang/lib/Frontend/CompilerInstance.cpp:801
#22 0x00000000024e6b67 in clang::ExecuteCompilerInvocation (Clang=0x67b5f10) at
~/llvm/src/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:222

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