[LLVMbugs] [Bug 16964] New: Assertion `ResultKind != Found || Decls.size() == 1' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16964

            Bug ID: 16964
           Summary: Assertion `ResultKind != Found || Decls.size() == 1'
                    failed.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This is a crash on invalid. Testcase:

  template<typename> struct bs {
    bs();
    static int* member();
    member();
    static member();
    static int* member(int);
  };

  template<typename T> bs<T>::bs() { member; }

  bs<int> test() {
    return bs<int>();
  }

It probably indicates we aren't marking a decl invalid properly?

$ clang a.cc
a.cc:4:3: error: C++ requires a type specifier for all declarations
  member();
  ^~~~~~
a.cc:5:10: error: C++ requires a type specifier for all declarations
  static member();
  ~~~~~~ ^
clang: SemaLookup.cpp:322: void clang::LookupResult::sanityImpl() const:
Assertion `ResultKind != Found || Decls.size() == 1' failed.
0  clang           0x00000000032f81ab llvm::sys::PrintStackTrace(_IO_FILE*) +
38
1  clang           0x00000000032f8432
2  clang           0x00000000032f7e76
3  libpthread.so.0 0x00007f3f86958cb0
4  libc.so.6       0x00007f3f85983425 gsignal + 53
5  libc.so.6       0x00007f3f85986b8b abort + 379
6  libc.so.6       0x00007f3f8597c0ee
7  libc.so.6       0x00007f3f8597c192
8  clang           0x00000000015080c8 clang::LookupResult::sanityImpl() const +
136
9  clang           0x000000000121854e
10 clang           0x0000000001218450
11 clang           0x0000000001218430
12 clang           0x00000000012184c4
13 clang           0x00000000012183e9
14 clang           0x000000000166443d
15 clang           0x000000000164fb55
16 clang           0x000000000164ecfb
17 clang           0x0000000001669cec
18 clang           0x00000000016584f2
19 clang           0x000000000164e875
20 clang           0x0000000001649554 clang::Sema::SubstStmt(clang::Stmt*,
clang::MultiLevelTemplateArgumentList const&) + 134
21 clang           0x0000000001687afb
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool) + 2407
22 clang           0x000000000168b53f
clang::Sema::PerformPendingInstantiations(bool) + 599
23 clang           0x000000000128c56f clang::Sema::ActOnEndOfTranslationUnit()
+ 613
24 clang           0x00000000011f5778
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 308
25 clang           0x00000000011f20b5 clang::ParseAST(clang::Sema&, bool, bool)
+ 597
26 clang           0x0000000000db1d2f clang::ASTFrontendAction::ExecuteAction()
+ 321
27 clang           0x0000000000ff7904 clang::CodeGenAction::ExecuteAction() +
1414
28 clang           0x0000000000db186e clang::FrontendAction::Execute() + 200
29 clang           0x0000000000d83af4
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 720
30 clang           0x0000000000d52b9e
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1018
31 clang           0x0000000000d43d10 cc1_main(char const**, char const**, char
const*, void*) + 717
32 clang           0x0000000000d4e407 main + 551
33 libc.so.6       0x00007f3f8596e76d __libc_start_main + 237
34 clang           0x0000000000d433e9
Stack dump:
0.      Program arguments:
/usr/local/google/home/nlewycky/llvm/Debug+Asserts/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
a.cc -mrelocation-model static -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version
2.22 -resource-dir
/usr/local/google/home/nlewycky/llvm/Debug+Asserts/bin/../lib/clang/3.4
-internal-isystem /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/x86_64-linux-gnu
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/backward
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/x86_64-linux-gnu/c++/4.6
-internal-isystem /usr/local/include -internal-isystem
/usr/local/google/home/nlewycky/llvm/Debug+Asserts/bin/../lib/clang/3.4/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fdeprecated-macro -fdebug-compilation-dir /usr/local/google/home/nlewycky
-ferror-limit 19 -fmessage-length 80 -mstackrealign -fobjc-runtime=gcc
-fobjc-default-synthesize-properties -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-slp -o /tmp/a-7f27da.o
-x c++ a.cc 
1.      <eof> parser at end of file
2.      a.cc:2:3: instantiating function definition 'bs'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.4 (trunk 188970) (llvm/trunk 188326:188970M)
Target: x86_64-unknown-linux-gnu

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