I've never used GDB. Does it allow you to place watch statements on breakpoints? If so, and if the address of the unreference scalar is consistant, then put a breakpoint on the return statement from malloc with a watch looking for the breaking address. That should allow you to backtrack to the routine that allocates the SV.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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In reply to Re: GDB journey into perl internals by BrowserUk
in thread GDB journey into perl internals by cosimo

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