http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50638
--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-10-07 16:58:40 UTC --- > --- Comment #5 from Michael Matz <matz at gcc dot gnu.org> 2011-10-07 > 16:53:59 UTC --- > Mine. See also http://gcc.gnu.org/ml/gcc-patches/2011-10/msg00597.html . > What's the variable that causes the segfault? Program received signal SIGSEGV, Segmentation fault. set_is_used (tp=0xbf674be4, Parma_Polyhedra_Library14Grid_Generator11set_divisorERK10__gmp_exprIA1_12__mpz_structS3_E=0x80475fc, data=0x0) at /vol/gcc/src/hg/trunk/local/gcc/tree-flow-inline.h:562 562 ann->used = true; (gdb) where #0 set_is_used (tp=0xbf674be4, Parma_Polyhedra_Library14Grid_Generator11set_divisorERK10__gmp_exprIA1_12__mpz_structS3_E=0x80475fc, data=0x0) at /vol/gcc/src/hg/trunk/local/gcc/tree-flow-inline.h:562 #1 mark_all_vars_used_1 (tp=0xbf674be4, Parma_Polyhedra_Library14Grid_Generator11set_divisorERK10__gmp_exprIA1_12__mpz_structS3_E=0x80475fc, data=0x0) at /vol/gcc/src/hg/trunk/local/gcc/tree-ssa-live.c:379 #2 0x087b479a in walk_tree_1 (tp=0xbf674be4, func=0x868f570 <mark_all_vars_used_1>, ZNK23Parma_Polyhedra_Library6Matrix8num_rowsEv=0x0, pset=0x0, lh=0) at /vol/gcc/src/hg/trunk/local/gcc/tree.c:10457 #3 0x08690152 in mark_all_vars_used () at /vol/gcc/src/hg/trunk/local/gcc/tree-ssa-live.c:595 #4 remove_unused_locals () at /vol/gcc/src/hg/trunk/local/gcc/tree-ssa-live.c:727 #5 0x084e8909 in execute_function_todo ( __gmp_exprIA1_12__mpq_structS3_EE6Status10ascii_loadERSi=0x826) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:1695 #6 0x084e8f44 in mp_exprIA1_12__mpq_structS1_E7set_strEPKci ( _RKNS_17Constraint_SystemEPj=0x84e87b4 <execute_function_todo>, __gmp_exprIA1_12__mpq_structS3_EE6Status10ascii_loadERSi=0x826) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:1548 #7 0x084e943e in execute_todo (2__mpz_structS7_E=2086) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:1741 #8 0x084ec2da in execute_one_pass (essionENS_15Relation_SymbolES4_=0x923e6a0) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2087 #9 0x084ec601 in execute_pass_list (essionENS_15Relation_SymbolES4_=0x923e6a0) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2119 #10 0x084ec614 in execute_pass_list (essionENS_15Relation_SymbolES4_=0x8f6c420) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2120 #11 0x084ec614 in execute_pass_list (essionENS_15Relation_SymbolES4_=0x8f6bb20) at /vol/gcc/src/hg/trunk/local/gcc/passes.c:2120 #12 0x0860d603 in tree_rest_of_compilation ( 4NNC_PolyhedronEEESaIS3_EE6removeERKS3_=0xbf638f80) at /vol/gcc/src/hg/trunk/local/gcc/tree-optimize.c:420 #13 0x082927d3 in cgraph_expand_function ( ZN23Parma_Polyhedra_Library3BoxINS_8IntervalI10__gmp_exprIA1_12__mpq_structS4_ENS_25Interval_Restriction_NoneINS_20Interval_Info_BitsetIjNS_29Rational_Interval_Info_PolicyEEEEEEEE24generalized_affine_imageENS_8VariableENS_15Relation_SymbolERKNS_17Linear_ExpressionERKS2_IA1_12__mpz_structSJ_E=0xbf5bf668) at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:1805 #14 0x08294a15 in Status8test_allEj () at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:1864 #15 cgraph_optimize () at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2141 #16 0x08294e7b in cgraph_finalize_compilation_unit () at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:1312 #17 0x08166724 in c_write_global_declarations () at /vol/gcc/src/hg/trunk/local/gcc/c-decl.c:9936 #18 0x0859e922 in compile_file (argc=11, argv=0x804794c) at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:581 #19 do_compile (argc=11, argv=0x804794c) at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:1925 #20 toplev_main (argc=11, argv=0x804794c) at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:2001 #21 0x08cacf9b in main (argc=11, argv=0x804794c) at /vol/gcc/src/hg/trunk/local/gcc/main.c:36 (gdb) up #1 mark_all_vars_used_1 (tp=0xbf674be4, Parma_Polyhedra_Library14Grid_Generator11set_divisorERK10__gmp_exprIA1_12__mpz_structS3_E=0x80475fc, data=0x0) at /vol/gcc/src/hg/trunk/local/gcc/tree-ssa-live.c:379 379 set_is_used (t); (gdb) p t $1 = (tree) 0xbf656e40 (gdb) pt <var_decl bf656e40 __emutls_v.__go_panic_defer type <record_type bf656de0 __emutls_object BLK size <integer_cst bf5b5a48 constant 128> unit size <integer_cst bf5b5a64 constant 16> align 32 symtab 0 alias set -1 canonical type bf656de0 fields <field_decl bf64bf74 __size type <integer_type bf5c73c0 unsigned int> unsigned SI file Program received signal SIGSEGV, Segmentation fault. 0xbf6dd359 in strlen () from /usr/lib/libc.so.1 The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on". Evaluation of the expression containing the function (debug_tree(tree_node*)) will be abandoned. When the function is done executing, GDB will silently stop. Rainer
