https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65337
--- Comment #9 from Steven Noonan <steven at uplinklabs dot net> --- Sure. $ gdb --args /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/./prev-gcc/xgcc -B/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/./prev-gcc/ -B/usr/x86_64-unknown-linux-gnu/bin/ -B/usr/x86_64-unknown-linux-gnu/bin/ -B/usr/x86_64-unknown-linux-gnu/lib/ -isystem /usr/x86_64-unknown-linux-gnu/include -isystem /usr/x86_64-unknown-linux-gnu/sys-include -c -g -O2 -flto=jobserver -frandom-seed=1 -gnatpg -W -Wall -nostdinc -I- -I. -Iada/generated -Iada -I/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada -I/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada/gcc-interface /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada/comperr.adb -o ada/comperr.o GNU gdb (GDB) 7.9.1 Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/./prev-gcc/xgcc...done. warning: File "/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/gcc/.gdbinit" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". To enable execution of this file add add-auto-load-safe-path /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/gcc/.gdbinit line to your configuration file "/home/snoonan/.gdbinit". To completely disable this security protection add set auto-load safe-path / line to your configuration file "/home/snoonan/.gdbinit". For more information about this security protection see the "Auto-loading safe path" section in the GDB manual. E.g., run from the shell: info "(gdb)Auto-loading safe path" (gdb) set follow-fork-mode child (gdb) run Starting program: /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/prev-gcc/xgcc -B/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/./prev-gcc/ -B/usr/x86_64-unknown-linux-gnu/bin/ -B/usr/x86_64-unknown-linux-gnu/bin/ -B/usr/x86_64-unknown-linux-gnu/lib/ -isystem /usr/x86_64-unknown-linux-gnu/include -isystem /usr/x86_64-unknown-linux-gnu/sys-include -c -g -O2 -flto=jobserver -frandom-seed=1 -gnatpg -W -Wall -nostdinc -I- -I. -Iada/generated -Iada -I/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada -I/home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada/gcc-interface /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada/comperr.adb -o ada/comperr.o [New process 16017] process 16017 is executing new program: /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-build/prev-gcc/gnat1 Program received signal SIGSEGV, Segmentation fault. [Switching to process 16017] 0x0000000000c354ed in ei_edge (i=...) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/basic-block.h:460 460 return EDGE_I (ei_container (i), i.index); (gdb) thread apply all bt full Thread 2 (process 16017): #0 0x0000000000c354ed in ei_edge (i=...) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/basic-block.h:460 No locals. #1 0x0000000000c376cf in inverted_post_order_compute (post_order=0x2e3d9a0, start_points=0x2bb0858 <bb_contains_live_stmts>) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/cfganal.c:837 ei = { index = 0, container = 0x7ffff68543a8 } pred = 0x7ffff6c8b8be <malloc+110> has_unvisited_bb = false bb = 0x0 stack = 0x2e1e740 sp = 171 post_order_num = 0 visited = 0x2decb40 __FUNCTION__ = "inverted_post_order_compute" #2 0x00000000011ddcdc in remove_dead_stmt (i=0x7fffffffc950, bb=0x7ffff5ad07b8) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/tree-ssa-dce.c:1076 postorder = 0x2e3d9a0 postorder_num = 0 ei = { index = 4121675328, container = 0x7fffffffc860 } e = 0x0 e2 = 0xdc9474 <gimple_call_flags(gimple_statement_base const*)+47> stmt = 0x7ffff5abc640 __FUNCTION__ = "remove_dead_stmt" #3 0x00000000011de918 in eliminate_unnecessary_stmts () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/tree-ssa-dce.c:1360 something_changed = true bb = 0x7ffff5ad07b8 gsi = { ptr = 0x7ffff5abc640, seq = 0x7ffff5ad07f8, bb = 0x7ffff5ad07b8 } psi = { ptr = 0x0, seq = 0x7ffff5ad07f8, bb = 0x7ffff5ad07b8 } stmt = 0x7ffff5abc640 call = 0x0 h = { m_vec = 0x2e407b0 } __FUNCTION__ = "eliminate_unnecessary_stmts" #4 0x00000000011df279 in perform_tree_ssa_dce (aggressive=true) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/tree-ssa-dce.c:1629 something_changed = false #5 0x00000000011df35a in tree_ssa_cd_dce () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/tree-ssa-dce.c:1670 No locals. #6 0x00000000011df4c7 in (anonymous namespace)::pass_cd_dce::execute (this=0x2c14da0) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/tree-ssa-dce.c:1735 No locals. #7 0x0000000000fdf3b5 in execute_one_pass (pass=0x2c14da0) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:2330 todo_after = 0 gate_status = true __FUNCTION__ = "execute_one_pass" #8 0x0000000000fdf5ef in execute_pass_list_1 (pass=0x2c14da0) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:2382 __FUNCTION__ = "execute_pass_list_1" #9 0x0000000000fdf620 in execute_pass_list_1 (pass=0x2c149e0) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:2383 __FUNCTION__ = "execute_pass_list_1" #10 0x0000000000fdf660 in execute_pass_list (fn=0x7ffff59fc7e0, pass=0x2c14860) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:2393 No locals. #11 0x0000000000fddfe3 in do_per_function_toporder (callback=0xfdf638 <execute_pass_list(function*, opt_pass*)>, data=0x2c14860) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:1728 node = 0x7ffff685ac40 hook = 0x2c04f40 order_idx = 0x7fffffffcb00 i = 0 __FUNCTION__ = "do_per_function_toporder" #12 0x0000000000fe0200 in execute_ipa_pass_list (pass=0x2c14800) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/passes.c:2736 __FUNCTION__ = "execute_ipa_pass_list" #13 0x0000000000c87712 in ipa_passes () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/cgraphunit.c:2171 passes = 0x2c13500 #14 0x0000000000c87b0e in symbol_table::compile (this=0x7ffff684f000) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/cgraphunit.c:2312 No locals. #15 0x0000000000c87d86 in symbol_table::finalize_compilation_unit (this=0x7ffff684f000) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/cgraphunit.c:2461 No locals. #16 0x00000000007f007e in gnat_write_global_declarations () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/ada/gcc-interface/utils.c:5217 i = 339 iter = 0x0 #17 0x00000000010ca5da in compile_file () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/toplev.c:608 No locals. #18 0x00000000010cc9a3 in do_compile () at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/toplev.c:2076 i = 1 #19 0x00000000010ccbd3 in toplev::main (this=0x7fffffffcdb0, argc=34, argv=0x7fffffffceb8) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/toplev.c:2174 No locals. #20 0x000000000199b8f4 in main (argc=34, argv=0x7fffffffceb8) at /home/snoonan/Development/ec2-packages/gcc-multilib/src/gcc-5-20150602/gcc/main.c:39 toplev = { m_use_TV_TOTAL = true, m_init_signals = true } (gdb)
