[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 --- Comment #9 from CVS Commits --- The master branch has been updated by Jakub Jelinek : https://gcc.gnu.org/g:955e4e3b7057b2142658376e8450fdbda1d31737 commit r10-6067-g955e4e3b7057b2142658376e8450fdbda1d31737 Author: Jakub Jelinek Date: Sat Jan 18 13:54:08 2020 +0100 testsuite: Fix dg-message syntax. 2020-01-18 Jakub Jelinek PR c/92833 * c-c++-common/pr92833-4.c: Fix dg-message syntax.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 Joseph S. Myers changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|--- |10.0 --- Comment #8 from Joseph S. Myers --- Fix committed, thanks.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 --- Comment #7 from CVS Commits --- The master branch has been updated by Joseph Myers : https://gcc.gnu.org/g:852f0ae80555238c425e33f98df5c7077694bd9f commit r10-6026-g852f0ae80555238c425e33f98df5c7077694bd9f Author: Kerem Kat Date: Thu Jan 16 23:42:11 2020 + Fix ICE caused by swallowing a token in c_parser_consume_token This patch fixes ICE on invalid code, specifically files that have conflict-marker-like signs before EOF. PR c/92833 gcc/c/ * c-parser.c (c_parser_consume_token): Fix peeked token stack pop to support 4 available tokens. gcc/testsuite/ * c-c++-common/pr92833-1.c, c-c++-common/pr92833-2.c, c-c++-common/pr92833-3.c, c-c++-common/pr92833-4.c: New tests.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 --- Comment #6 from Kerem Kat --- Created attachment 47569 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47569&action=edit fix ice PR c/92833 * parser.c (c_parser_consume_token): Fix peeked token stack pop to support 4 available tokens. * c-c++-common/pr92833-*.c: New tests.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 Thomas Koenig changed: What|Removed |Added Status|NEW |ASSIGNED CC||tkoenig at gcc dot gnu.org Assignee|unassigned at gcc dot gnu.org |keremkat+gcc at gmail dot com --- Comment #5 from Thomas Koenig --- (In reply to Kerem Kat from comment #4) > Please assign to me. Happy to oblige.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 --- Comment #4 from Kerem Kat --- Please assign to me.
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 Kerem Kat changed: What|Removed |Added CC||keremkat+gcc at gmail dot com --- Comment #3 from Kerem Kat --- This is caused by c_parser_peek_conflict_marker peeking into 4 tokens at once whereas c_parser_consume_token expects a maximum of 3 tokens to be peeked. In this case, last token is EOF and it is swallowed by c_parser_consume_token, leading to ICE within the next c_parser_skip_to_end_of_block_or_statement invocation which tries to read pfile->buffer that was popped to become empty via _cpp_pop_buffer. Minimal test case is six less than signs: << Full stack trace: 92833-ice.c:1:1: error: expected identifier or ‘(’ before ‘<<’ token 1 | << | ^~ 92833-ice.c:1:1: internal compiler error: Segmentation fault 0xe150f3 crash_signal dir/gcc/toplev.c:328 0x187c684 _cpp_lex_direct dir/libcpp/lex.c:2725 0x187c3e4 _cpp_lex_token dir/libcpp/lex.c:2608 0x1886d77 cpp_get_token_1 dir/libcpp/macro.c:2707 0x8ef0e5 c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int) dir/gcc/c-family/c-lex.c:458 0x8426b5 c_lex_one_token dir/gcc/c/c-parser.c:270 0x842bbe c_parser_peek_token(c_parser*) dir/gcc/c/c-parser.c:474 0x843ffd c_parser_skip_to_end_of_block_or_statement dir/gcc/c/c-parser.c:1322 0x8455bd c_parser_declaration_or_fndef dir/gcc/c/c-parser.c:2123 0x844a1d c_parser_external_declaration dir/gcc/c/c-parser.c:1742 0x844566 c_parser_translation_unit dir/gcc/c/c-parser.c:1615 0x884ed7 c_parse_file() dir/gcc/c/c-parser.c:21704 0x8f9b43 c_common_parse_file() dir/gcc/c-family/c-opts.c:1186
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 --- Comment #2 from David Binderman --- Something similar for this list of tokens: extern == == ==
[Bug c/92833] ice for broken C code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92833 Marek Polacek changed: What|Removed |Added Keywords||error-recovery, ||ice-on-invalid-code Status|UNCONFIRMED |NEW Last reconfirmed||2019-12-05 CC||mpolacek at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Marek Polacek --- Confirmed.
