[LLVMbugs] [Bug 21843] New: [fuzz] Assertion `(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && "Broken nested name specifier"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21843

            Bug ID: 21843
           Summary: [fuzz] Assertion `(!Prefix || (Prefix->getAsType() ==
                    nullptr && Prefix->getAsIdentifier() == nullptr)) &&
                    "Broken nested name specifier"' 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 13484
  --> http://llvm.org/bugs/attachment.cgi?id=13484&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/AST/NestedNameSpecifier.cpp:66: static
clang::NestedNameSpecifier *clang::NestedNameSpecifier::Create(const
clang::ASTContext &, clang::NestedNameSpecifier *, const clang::NamespaceDecl
*): Assertion `(!Prefix || (Prefix->getAsType() == nullptr &&
Prefix->getAsIdentifier() == nullptr)) && "Broken nested name specifier"'
failed.

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