[LLVMbugs] [Bug 21852] New: [fuzz] Assertion `Val && "isa<> used on a null pointer"' failed.

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Dec 10 13:55:03 PST 2014


            Bug ID: 21852
           Summary: [fuzz] Assertion `Val && "isa<> used on a null
                    pointer"' 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 13493
  --> http://llvm.org/bugs/attachment.cgi?id=13493&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: include/llvm/Support/Casting.h:95: static bool
llvm::isa_impl_cl<clang::ExprWithCleanups, const clang::Expr *>::doit(const
>From *) [To = clang::ExprWithCleanups, From = const clang::Expr *]: Assertion
`Val && "isa<> used on a null pointer"' failed.

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