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[69.118.112.187]) by smtp.gmail.com with ESMTPSA id i7-20020ad44107000000b0067a254f0febsm3547508qvp.146.2023.11.28.08.51.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Nov 2023 08:51:16 -0800 (PST) From: Patrick Palka To: gcc-patches@gcc.gnu.org Cc: jason@redhat.com, Patrick Palka Subject: [PATCH 2/2] c++: guard more against undiagnosed error_mark_node [PR112658] Date: Tue, 28 Nov 2023 11:51:12 -0500 Message-ID: <20231128165112.2571430-2-ppalka@redhat.com> X-Mailer: git-send-email 2.43.0.rc1 In-Reply-To: <20231128165112.2571430-1-ppalka@redhat.com> References: <20231128165112.2571430-1-ppalka@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-12.9 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, RCVD_IN_SORBS_WEB, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1783827332757230173 X-GMAIL-MSGID: 1783827332757230173 This adds a sanity check to cp_parser_expression_statement similar to the one in finish_expr_stmt added by r6-6795-g0fd9d4921f7ba2, which effectively downgrades accepts-invalid/wrong-code bugs like this one into ice-on-invalid/ice-on-valid ones. PR c++/112658 gcc/cp/ChangeLog: * parser.cc (cp_parser_expression_statement): If the statement is erroneous, make sure we've seen an error. --- gcc/cp/parser.cc | 3 +++ 1 file changed, 3 insertions(+) diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc index 2464d1a0783..743d6517b09 100644 --- a/gcc/cp/parser.cc +++ b/gcc/cp/parser.cc @@ -12962,6 +12962,9 @@ cp_parser_expression_statement (cp_parser* parser, tree in_statement_expr) if (statement == error_mark_node && !cp_parser_uncommitted_to_tentative_parse_p (parser)) { + /* If we ran into a problem, make sure we complained. */ + gcc_assert (seen_error ()); + cp_parser_skip_to_end_of_block_or_statement (parser); return error_mark_node; }