APPROVE COMMIT 21.5 NOTE: This patch has been committed. AM> /home/alexm/src/xemacs-21.5.21/src/../lisp/'. Program terminated AM> with signal 11, Segmentation fault. #0 0x081b1e8f in AM> set_lookup_table (ptr=0xb7a4a800, ph=0x83fb6b0) at mc-alloc.c:531 AM> 531 LEVEL2 (l2, L2_INDEX (ptr)) = ph; The cause of the problem is that the lookup table is not correctly initialized. The segfault on x86-64 systems reported by Mike Fabian may also be caused by this bug. Alexey, could you please test if this patch really fixes your build and report back? Thank you! src/ChangeLog addition: 2005-09-14 Marcus Crestani <crestani(a)xemacs.org&gt; * mc-alloc.c (set_lookup_table): Adjust parameter to other memset calls. * mc-alloc.c (init_mc_allocator): Zero global allocator structure. manual-mc-xemacs-21.5 source patch: Diff command: cvs -q diff -u Files affected: src/mc-alloc.c Index: src/mc-alloc.c =================================================================== RCS file: /pack/xemacscvs/XEmacs/xemacs/src/mc-alloc.c,v retrieving revision 1.3 diff -u -r1.3 mc-alloc.c --- src/mc-alloc.c 15 May 2005 16:38:13 -0000 1.3 +++ src/mc-alloc.c 14 Sep 2005 13:26:07 -0000 ＠＠ -521,7 +521,7 ＠＠ MC_MALLOCED_BYTES += malloced_storage_size (0, sizeof (level_2_lookup_tree), 0); #endif - memset (l2, 0, sizeof (level_2_lookup_tree)); + memset (l2, '\0', sizeof (level_2_lookup_tree)); #ifdef USE_HASH_TABLE LEVEL2_HASH_LINK (l2) = PTR_LOOKUP_TABLE (l1_index); #endif ＠＠ -1689,6 +1689,8 ＠＠ init_mc_allocator (void) { int i; + + memset (&mc_allocator_globals, '\0', sizeof (mc_allocator_globals_type)); for (i = 0; i < N_USED_PAGE_LISTS; i++) { -- Marcus