Valgrind output: $ valgrind -q --trace-children=yes g++ testcase.C testcase.C:3:14: error: explicit specialization in non-namespace scope 'struct S< <template-parameter-1-1> >' testcase.C:3:23: error: specialization of 'template<class> struct S' must appear at namespace scope testcase.C:3:23: error: template parameters not used in partial specialization: testcase.C:3:23: error: '<template-parameter-1-1>' ==28340== Invalid read of size 2 ==28340== at 0x4AF07A: build_new_method_call (call.c:6221) ==28340== by 0x4B0A70: build_special_member_call (call.c:6126) ==28340== by 0x5AA481: expand_aggr_init_1 (init.c:1355) ==28340== by 0x5AF0B8: build_aggr_init (init.c:1275) ==28340== by 0x4B6673: build_aggr_init_full_exprs (decl.c:5138) ==28340== by 0x4D3CD1: cp_finish_decl (decl.c:5264) ==28340== by 0x57C63D: cp_parser_init_declarator (parser.c:13743) ==28340== by 0x57CFCA: cp_parser_simple_declaration (parser.c:8943) ==28340== by 0x57D3D6: cp_parser_block_declaration (parser.c:8841) ==28340== by 0x583EA9: cp_parser_declaration (parser.c:8746) ==28340== by 0x583919: cp_parser_declaration_seq_opt (parser.c:8637) ==28340== by 0x584C24: c_parse_file (parser.c:3091) ==28340== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==28340== testcase.C:9:14: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions.
------ testcase.C ------ template < typename > struct S { template < > struct S < int > { S(int); }; }; S < int > s(0); ------------------------ Tested revisions: r158150, 4.5 r158131, 4.4 r158133 - crash 4.4.3, 4.3.4, 4.1.2, 3.4.6, 3.3.6 - crash 4.2.4 - OK (without asserts) Only 4.2.4 works: $ g++-4.2.4 testcase.C testcase.C:3: error: explicit specialization in non-namespace scope 'struct S< <template-parameter-1-1> >' testcase.C:9: error: no matching function for call to 'S<int>::S(int)' testcase.C:2: note: candidates are: S<int>::S() testcase.C:2: note: S<int>::S(const S<int>&) -- Summary: ICE: SIGSEGV with template specialization in non- namespace space Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: zsojka at seznam dot cz GCC host triplet: x86_64-pc-linux-gnu GCC target triplet: x86_64-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43705