From: Panagiotis Tsirigotis (pgttso_at_best.com)
Date: Tue May 23 2000 - 09:32:36 BST
Here is the bug: 3.35beta10 (and previous beta's, and 3.34) would immediately core dump while reading the symbol table for my C++ program. I finally traced the problem to the mop_up function in ao_symscan.c. The function would release the memory of the previous_argument string, but would not set previous_argument to NULL. The bug was triggered by using a g++ that generates vtable thunks for virtual function dispatch. These pseudo-functions have a name that contains the string "__thunk_"; while demangling their name, ups invokes internal_cplus_demangle recursively; therefore, mop_up is also invoked twice, and because of this bug, it would try to free the memory associated with previous_argument twice. The fix is trivial; I am attaching the context diff. Now, I still have to figure out why sometimes ups is unable to find class definitions...... Panos
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