[LLVMbugs] [Bug 18099] New: llvm/Support/ValueHandle.h:195:12: runtime error: downcast of misaligned address 0xfffffffffffffffc for type 'llvm::BasicBlock', which requires 8 byte alignment

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18099

            Bug ID: 18099
           Summary: llvm/Support/ValueHandle.h:195:12: runtime error:
                    downcast of misaligned address 0xfffffffffffffffc for
                    type 'llvm::BasicBlock', which requires 8 byte
                    alignment
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jmunxsys at yahoo.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11635
  --> http://llvm.org/bugs/attachment.cgi?id=11635&action=edit
Output from the crash.

I was compiling with CXXFLAGS set to -fsanitize=undefined -fno-sanitize=vptr
and I'm getting this failure. CXX is clang with no special flags, I believe
it's ASSERT+OPTIMIZE.

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