https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84852
Bug ID: 84852 Summary: [8 Regression] ICE in calculate_line_spans, at diagnostic-show-locus.c:1105 Product: gcc Version: 8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Changed between 20170618 and 20170716 : $ cat z1.c #line 7777777777 int foo (void) { return strlen(""); } $ gcc-8-20180311 -c z1.c z1.c: In function 'foo': z1.c:-812156815:25: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration] z1.c:-812156815:25: warning: incompatible implicit declaration of built-in function 'strlen' z1.c:-812156815:25: note: include '<string.h>' or provide a declaration of 'strlen' z1.c:-812156815:1: internal compiler error: in calculate_line_spans, at diagnostic-show-locus.c:1105 0x123853b calculate_line_spans ../../gcc/diagnostic-show-locus.c:1105 0x123853b layout ../../gcc/diagnostic-show-locus.c:819 0x1238724 diagnostic_show_locus(diagnostic_context*, rich_location*, diagnostic_t) ../../gcc/diagnostic-show-locus.c:1970 0x6f8df7 c_diagnostic_finalizer ../../gcc/c-family/c-opts.c:169 0x12352f5 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*) ../../gcc/diagnostic.c:989 0x1235743 diagnostic_impl ../../gcc/diagnostic.c:1108 0x1236489 inform(rich_location*, char const*, ...) ../../gcc/diagnostic.c:1181 0x666377 implicitly_declare(unsigned int, tree_node*) ../../gcc/c/c-decl.c:3418 0x67a4db build_external_ref(unsigned int, tree_node*, bool, tree_node**) ../../gcc/c/c-typeck.c:2755 0x6980d7 c_parser_postfix_expression ../../gcc/c/c-parser.c:7881 0x6a0fa2 c_parser_unary_expression ../../gcc/c/c-parser.c:7263 0x6a1d57 c_parser_cast_expression ../../gcc/c/c-parser.c:7104 0x6a2023 c_parser_binary_expression ../../gcc/c/c-parser.c:6907 0x6a3065 c_parser_conditional_expression ../../gcc/c/c-parser.c:6645 0x6a35f0 c_parser_expr_no_commas ../../gcc/c/c-parser.c:6562 0x6a3872 c_parser_expression ../../gcc/c/c-parser.c:9292 0x6a4d79 c_parser_expression_conv ../../gcc/c/c-parser.c:9325 0x6b4c77 c_parser_statement_after_labels ../../gcc/c/c-parser.c:5451 0x6b0a4a c_parser_compound_statement_nostart ../../gcc/c/c-parser.c:5078 0x6b1156 c_parser_compound_statement ../../gcc/c/c-parser.c:4912