[LLVMbugs] [Bug 21871] New: [fuzz] Assertion `(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && "non-friend with qualified name defined in dependent context"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21871

            Bug ID: 21871
           Summary: [fuzz] Assertion `(NewDecl->getFriendObjectKind() ||
                    !OldDecl->getLexicalDeclContext()->isDependentContext(
                    )) && "non-friend with qualified name defined in
                    dependent context"' 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 13512
  --> http://llvm.org/bugs/attachment.cgi?id=13512&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/SemaTemplateInstantiateDecl.cpp:47: bool
SubstQualifier(clang::Sema &, const DeclT *, DeclT *, const
clang::MultiLevelTemplateArgumentList &) [DeclT = clang::TagDecl]: Assertion
`(NewDecl->getFriendObjectKind() ||
!OldDecl->getLexicalDeclContext()->isDependentContext()) && "non-friend with
qualified name defined in dependent context"' failed.

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