Hi, the problem is that Andi's test build is with -O0 and we should not allocate ipa-prop datastructures then. We do so via duplication hook by accident since do_whole_program_analysis for some illogical reason calls ipa_register_cgraph_hooks.
Comitted as obvoius. Honza PR lto/48952 * lto.c (do_whole_program_analysis): Do not register cgraph hooks. Index: lto/lto.c =================================================================== --- lto/lto.c (revision 173666) +++ lto/lto.c (working copy) @@ -2511,7 +2511,6 @@ do_whole_program_analysis (void) dump_varpool (cgraph_dump_file); } bitmap_obstack_initialize (NULL); - ipa_register_cgraph_hooks (); cgraph_state = CGRAPH_STATE_IPA_SSA; execute_ipa_pass_list (all_regular_ipa_passes);