[LLVMbugs] [Bug 1677] New: Failed assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"'

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1677

           Summary: Failed assertion `isa<X>(Val) && "cast<Ty>() argument of
                    incompatible type!"'
           Product: new-bugs
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: astrange at ithinksw.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1128)
 --> (http://llvm.org/bugs/attachment.cgi?id=1128)
testcase (QT SMC decoder from ffmpeg)

> /usr/local/llvmgcc/bin/llvm-gcc -v
Using built-in specs.
Target: i686-apple-darwin8
Configured with: ../llvm-gcc4-2.0.source/configure
--prefix=/Users/tonic/release/llvm-gcc/obj/../install --program-prefix=llvm-
--enable-llvm=/Users/tonic/release/llvm-2.0
--enable-languages=c,c++,objc,obj-c++ --with-arch=nocona --with-tune=generic
--with-gxx-include-dir=/usr/include/c++/4.0.0 --build=i686-apple-darwin8
--host=i686-apple-darwin8 --target=i686-apple-darwin8
Thread model: posix
gcc version 4.0.1 LLVM (Apple Computer, Inc. build 2.0)

> /usr/local/llvmgcc/bin/llvm-gcc -O3 -emit-llvm -g -mdynamic-no-pic -march=nocona -mtune=nocona -c llvm-smc.i
/Users/tonic/release/llvm-2.0/include/llvm/Support/Casting.h:199: failed
assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"'
smc.c:490: internal compiler error: Abort trap

Changing optimization flags leads to one other error and a segfault:

> /usr/local/llvmgcc/bin/llvm-gcc -O1 -emit-llvm -g -mdynamic-no-pic -c llvm-smc.i
/Users/tonic/release/llvm-2.0/include/llvm/Type.h:295: failed assertion
`isAbstract() && "Cannot drop a reference to a non-abstract type!"'

> /usr/local/llvmgcc/bin/llvm-gcc -O2 -emit-llvm -g -mdynamic-no-pic -march=nocona -mtune=nocona -c llvm-smc.i
smc.c:490: internal compiler error: Segmentation fault

gcc compiles it with no warnings.


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