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<TITLE> [Mono-bugs] [Bug 481559] New: uninitialized local causes failed assertion in mono_local_regalloc
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<H1>[Mono-bugs] [Bug 481559] New: uninitialized local causes failed assertion in mono_local_regalloc</H1>
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<B>bugzilla_noreply at novell.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20481559%5D%20New%3A%20uninitialized%20local%20causes%20failed%0A%20assertion%20in%20mono_local_regalloc&In-Reply-To="
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TITLE="[Mono-bugs] [Bug 481559] New: uninitialized local causes failed assertion in mono_local_regalloc">bugzilla_noreply at novell.com
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</A><BR>
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<I>Tue Mar 3 12:15:57 EST 2009</I>
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<PRE><A HREF="https://bugzilla.novell.com/show_bug.cgi?id=481559">https://bugzilla.novell.com/show_bug.cgi?id=481559</A>
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Summary: uninitialized local causes failed assertion in
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mono_local_regalloc
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Classification: Mono
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Product: Mono: Compilers
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Version: 2.4.x
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Platform: x86
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OS/Version: Linux
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Status: NEW
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Severity: Normal
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Priority: P5 - None
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Component: Other.
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AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">bugzilla.novell at rohou.it</A>
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QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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Found By: ---
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Created an attachment (id=276792)
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--> (<A HREF="https://bugzilla.novell.com/attachment.cgi?id=276792">https://bugzilla.novell.com/attachment.cgi?id=276792</A>)
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binary that reproduces the problem when run
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User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.9.0.6)
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Gecko/2009011913 Firefox/3.0.6
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When generating code from C, I sometimes have uninitialized locals. When such a
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value is returned by the function, Mono crashed with the following message:
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** ERROR **: file mini-codegen.c: line 1032 (mono_local_regalloc): assertion
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fai
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led: (reginfo [ins->sreg1].born_in > 0)
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Obviously the code is not verifiable, still it should not kill the register
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allocator.
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This case originally occured in C code that looked like:
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int c;
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int main()
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{
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if (c)
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exit(1); // C compiler optimized out initialization of return value
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return 0;
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}
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Reproducible: Always
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Steps to Reproduce:
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1. Try the following piece of code, or directly the attached binary.
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module '<Module>'
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method public static int32 'main' () cil managed
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{
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.entrypoint
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.locals (int32 'tmp') // not initialized
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.maxstack 1
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ldloc 'tmp'
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ret
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}
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Actual Results:
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Assertion failed.
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Expected Results:
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No assertion.
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--
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Configure bugmail: <A HREF="https://bugzilla.novell.com/userprefs.cgi?tab=email">https://bugzilla.novell.com/userprefs.cgi?tab=email</A>
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------- You are receiving this mail because: -------
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You are the QA contact for the bug.
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You are the assignee for the bug.
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</PRE>
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