https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79157
--- Comment #12 from Igor Kozhukhov <ikozhukhov at gmail dot com> --- run as mdb: $ mdb /usr/bin/gfortran-5 > ::run -S conftestf.f -g -O2 conftest.o -o conftest mdb: forksys detected: follow (p)arent or (c)hild? c mdb: target forked child process 17005 (debugger following child) mdb: execve detected: (f)ollow new program or (s)top? f mdb: target performed exec of /usr/gcc/5/lib/gcc/sparcv9-sun-solaris2.11/5.4.0/f951 mdb: stop on SIGSEGV mdb: target stopped at: _ZStL23local_Rb_tree_decrementPSt18_Rb_tree_node_base+0x14: ldx [%g1 + 0x8], %g1 > $C ffffffff7fffdbd1 _ZStL23local_Rb_tree_decrementPSt18_Rb_tree_node_base+0x14(ffffffff7fffe540, ffffffff7fffe548, ffffffff7fffe668, 0, 0, ffffffff7a800811) ffffffff7fffdc81 _ZNSt8_Rb_treeIP9tree_nodeSt4pairIKS1_S1_ESt10_Select1stIS4_ESt4lessIS1_ESaIS4_EE24_M_get_insert_u nique_posERS3_+0x178(101bd6d80, ffffffff7fffea78, ffffffffffffffff, 0, 0, ffffffff7a818241) ffffffff7fffddd1 _ZNSt8_Rb_treeIP9tree_nodeSt4pairIKS1_S1_ESt10_Select1stIS4_ESt4lessIS1_ESaIS4_EE29_M_get_insert_h int_unique_posESt23_Rb_tree_const_iteratorIS4_ERS3_+0x130(101bd6d80, 101bd6d88, ffffffff7fffea78, 1, 5f, 101bd6d88) ffffffff7fffdf61 _ZNSt8_Rb_treeIP9tree_nodeSt4pairIKS1_S1_ESt10_Select1stIS4_ESt4lessIS1_ESaIS4_EE17_M_insert_uniqu e_INSA_11_Alloc_nodeEEESt17_Rb_tree_iteratorIS4_ESt23_Rb_tree_const_iteratorIS4_ERKS4_RT_+0x3c( 101bd6d80, 101bd6d88, ffffffff7fffea78, ffffffff7fffe8e8, 6f, 6f) ffffffff7fffe031 _ZNSt8_Rb_treeIP9tree_nodeSt4pairIKS1_S1_ESt10_Select1stIS4_ESt4lessIS1_ESaIS4_EE17_M_insert_uniqu e_ESt23_Rb_tree_const_iteratorIS4_ERKS4_+0x3c(101bd6d80, 101bd6d88, ffffffff7fffea78, ffff3e98, 1 , 0) ffffffff7fffe0f1 _ZNSt3mapIP9tree_nodeS1_St4lessIS1_ESaISt4pairIKS1_S1_EEE6insertESt17_Rb_tree_iteratorIS6_ERKS6_+0 x3c(101bd6d80, 101bd6d88, ffffffff7fffea78, 1, ff00, 101bd6d80) ffffffff7fffe1b1 _ZNSt3mapIP9tree_nodeS1_St4lessIS1_ESaISt4pairIKS1_S1_EEEixERS5_+0x124(101bd6d80 , ffffffff7fffeb40, ffffffff7a89d798, ffffffff7a8a47e0, 1, 0) ffffffff7fffe291 _ZL17build_common_declP15gfc_common_headP9tree_nodeb+0x4f0(101cbbba0, ffffffff7a8a47e0, 0, 0, 0, 4) ffffffff7fffe361 _ZL13create_commonP15gfc_common_headP12segment_infob+0x1b4(101cbbba0, 101c806a0, 0, 0, 0, ffffffff7a800811) ffffffff7fffe4a1 _ZL16translate_commonP15gfc_common_headP10gfc_symbol+0x4a8(101cbbba0, 101cbc440, 1, 1, 0, ffffffff7a89fe31) ffffffff7fffe591 _ZL12named_commonP11gfc_symtree+0x24(101c805a0, ffffffff7fffeef0, 0, 1, 38, 101c8adf0) ffffffff7fffe641 _ZL19do_traverse_symtreeP11gfc_symtreePFvS0_EPFvP10gfc_symbolE+0x220(101c805a0, 100624e90, 0, ffffffff7a810fc0, 0, ffffffff7a89fd88) ffffffff7fffe731 _Z20gfc_traverse_symtreeP11gfc_symtreePFvS0_E+0x18(101c805a0, 100624e90, 0, 0, 0 , ffffffff7a89fd88) ffffffff7fffe7e1 _Z16gfc_trans_commonP13gfc_namespace+0xb8(101d14490, 0, ffffffffffffffff, 0, 0, 0 ) ffffffff7fffe8a1 _Z26gfc_generate_function_codeP13gfc_namespace+0x1e8(101d14490, 0, 0, 0, 0, 101bd6c19) ffffffff7fffea31 _Z17gfc_generate_codeP13gfc_namespace+0x50(101d14490, ffffffff7ffff394, ffffffff7ffff398, 100566cb8, 0, 101bd6c19) ffffffff7fffeae1 _ZL27translate_all_program_unitsP13gfc_namespace+0x2bc(101d14490, ffffffff7a81cfe0, 101d14e40, ffffffff7a879c70, ffffffff7a810690, ffffffff7a810fc0) ffffffff7fffeba1 _Z14gfc_parse_filev+0x840(0, 114, 0, 101c79000, 101010100000000, ffffffff7a8001b0 ) ffffffff7fffed01 _ZL17gfc_be_parse_filev+0xc(4b, 114, ffffffffffffffff, 0, 74, 0) ffffffff7fffedc1 _ZL12compile_filev+0x30(2, 0, 26654, 0, 0, ffffffff7ffff728) ffffffff7fffee81 _ZL10do_compilev+0x284(ffffffff7ffff8ae, 101c76078, 101cd2780, b, 0, 101c76cf0) ffffffff7fffef41 _ZN6toplev4mainEiPPc+0x2b4(ffffffff7ffff8ae, f, ffffffff7ffff968, 0, 0, 0) ffffffff7fffeff1 main+0x40(f, ffffffff7ffff968, ffffffff7ffff9e8, 101c798a0, 100000000, 0) ffffffff7ffff0b1 _start+0x7c(0, 0, 0, 0, 0, 0)
