[LLVMbugs] [Bug 21857] New: Assertion `!R.empty() && "lookup for a constructor or assignment operator was empty"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21857

            Bug ID: 21857
           Summary: Assertion `!R.empty() && "lookup for a constructor or
                    assignment operator was empty"' failed.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: sami.liedes at iki.fi
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13498
  --> http://llvm.org/bugs/attachment.cgi?id=13498&action=edit
test case

Fuzzing discovered that the attached test case, when given as input to

  clang -fno-crash-diagnostics -std=c++11 -xc++ -c -emit-llvm

causes this assertion failure:

clang-3.6: tools/clang/lib/Sema/SemaLookup.cpp:2504:
Sema::SpecialMemberOverloadResult
*clang::Sema::LookupSpecialMember(clang::CXXRecordDecl *,
clang::Sema::CXXSpecialMember, bool, bool, bool, bool, bool): Assertion
`!R.empty() && "lookup for a constructor or assignment operator was empty"'
failed.

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