During a mainline bootstrap on alpha-dec-osf5.1b, the libstdc++ configure failed:
checking for exception model to use... configure: error: unable to detect exception model make[1]: *** [configure-target-libstdc++-v3] Error 1 config.log reveals: configure:13794: checking for exception model to use configure:13838: /vol/gccsrc/obj/gcc-4.3.0-20070612/5.1b-gcc/./gcc/xgcc -shared-libgcc -B/vol/gccsrc/obj/gcc-4.3.0-20070612/5.1b-gcc/./gcc -nostdinc++ -L/vol/gccsrc/obj/gcc-4.3.0-20070612/5.1b-gcc/alpha-dec-osf5.1b/libstdc++-v3/src -L/vol/gccsrc/obj/gcc-4.3.0-20070612/5.1b-gcc/alpha-dec-osf5.1b/libstdc++-v3/src/.libs -B/vol/gcc/alpha-dec-osf5.1b/bin/ -B/vol/gcc/alpha-dec-osf5.1b/lib/ -isystem /vol/gcc/alpha-dec-osf5.1b/include -isystem /vol/gcc/alpha-dec-osf5.1b/sys-include -c -S conftest.cc >&5 configure: In function 'void foo()': configure:13836: error: end insn 27 for block 7 not found in the insn stream configure:13836: error: head insn 24 for block 7 not found in the insn stream configure:13836: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. configure:13841: $? = 1 configure:13870: error: unable to detect exception model This happens with the following conftest.cc: struct S { ~S(); }; void bar(); void foo() { S s; bar(); } % ./cc1plus conftest.cc void foo() Analyzing compilation unit Performing interprocedural optimizations <visibility> <early_local_cleanups> <inline>Assembling functions: void foo() conftest.cc: In function 'void foo()': conftest.cc:7: error: end insn 27 for block 7 not found in the insn stream conftest.cc:7: error: head insn 24 for block 7 not found in the insn stream conftest.cc:7: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Running gdb reveals Program received signal SIGSEGV, Segmentation fault. rtl_verify_flow_info () at /vol/gcc/src/gcc-dist/gcc/cfgrtl.c:2005 (gdb) where #0 rtl_verify_flow_info () at /vol/gcc/src/gcc-dist/gcc/cfgrtl.c:2005 #1 0x0000000120516638 in verify_flow_info () at /vol/gcc/src/gcc-dist/gcc/cfghooks.c:245 #2 0x0000000120618934 in commit_edge_insertions () at /vol/gcc/src/gcc-dist/gcc/cfgrtl.c:1467 #3 0x0000000120415bcc in alpha_gp_save_rtx () at /vol/gcc/src/gcc-dist/gcc/config/alpha/alpha.c:4784 #4 0x00000001206406fc in gen_exception_receiver () at /vol/gcc/src/gcc-dist/gcc/config/alpha/alpha.md:7019 #5 0x0000000120314dc8 in finish_eh_generation () at /vol/gcc/src/gcc-dist/gcc/except.c:1633 #6 0x0000000120314f98 in rest_of_handle_eh () at /vol/gcc/src/gcc-dist/gcc/except.c:3985 #7 0x0000000120421978 in execute_one_pass (pass=0x0) at /vol/gcc/src/gcc-dist/gcc/passes.c:1124 #8 0x0000000120421c48 in execute_pass_list (pass=0x0) at /vol/gcc/src/gcc-dist/gcc/passes.c:1177 #9 0x0000000120421c5c in execute_pass_list (pass=0x0) at /vol/gcc/src/gcc-dist/gcc/passes.c:1178 #10 0x00000001204fef44 in tree_rest_of_compilation (fndecl=0x0) at /vol/gcc/src/gcc-dist/gcc/tree-optimize.c:406 #11 0x00000001202535c8 in c_expand_body (fndecl=0x140137d80) at /vol/gcc/src/gcc-dist/gcc/c-common.c:4331 #12 0x00000001201ea958 in expand_body (fn=0x18de60) at /vol/gcc/src/gcc-dist/gcc/cp/semantics.c:3136 #13 0x0000000120423f60 in cgraph_expand_function (node=0x18de60) at /vol/gcc/src/gcc-dist/gcc/cgraphunit.c:1073 #14 0x0000000120427400 in cgraph_optimize () at /vol/gcc/src/gcc-dist/gcc/cgraphunit.c:1142 #15 0x000000012015e054 in cp_write_global_declarations () at /vol/gcc/src/gcc-dist/gcc/cp/decl2.c:3305 #16 0x00000001204432e0 in toplev_main (argc=1, argv=0x0) at /vol/gcc/src/gcc-dist/gcc/toplev.c:1064 #17 0x000000012029fe98 in main (argc=1075019136, argv=0x11fffbb30) at /vol/gcc/src/gcc-dist/gcc/main.c:35 (gdb) p x $1 = 0x0 I.e. rtl_verify_flow_info dereferences a NULL pointer. This happens only on alpha-dec-osf5.1b, alpha-dec-osf4.0f is unaffected. Environment: System: OSF1 bartok V5.1 2650 alpha Machine: alpha host: alpha-dec-osf5.1b build: alpha-dec-osf5.1b target: alpha-dec-osf5.1b configured with: /vol/gcc/src/gcc-dist/configure --prefix=/vol/gcc --with-local-prefix=/vol/gcc --disable-nls --host alpha-dec-osf5.1b --build alpha-dec-osf5.1b --target alpha-dec-osf5.1b --with-gmp=/vol/gcc --with-mpfr=/vol/gcc --enable-languages=c,c++,fortran,java,objc,ada --disable-libmudflap How-To-Repeat: Bootstrap as described above. -- Summary: cc1plus ICE configuring libstdc++ on Tru64 UNIX V5.1B: SEGV in rtl_verify_flow_info Product: gcc Version: unknown Status: UNCONFIRMED Severity: critical Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ro at techfak dot uni-bielefeld dot de GCC build triplet: alpha-dec-osf5.1b GCC host triplet: alpha-dec-osf5.1b GCC target triplet: alpha-dec-osf5.1b http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32325
