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Mon, 25 Jul 2022 11:43:10 -0700 (PDT) X-Received: by 2002:a05:622a:188:b0:31f:1435:781d with SMTP id s8-20020a05622a018800b0031f1435781dmr11760892qtw.389.1658774590092; Mon, 25 Jul 2022 11:43:10 -0700 (PDT) Received: from redhat.com ([2601:184:4780:4310::fc83]) by smtp.gmail.com with ESMTPSA id dt26-20020a05620a479a00b006b615cd8c13sm9781347qkb.106.2022.07.25.11.43.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Jul 2022 11:43:09 -0700 (PDT) Date: Mon, 25 Jul 2022 14:43:07 -0400 To: Jason Merrill Subject: [v2 PATCH] c++: ICE with erroneous template redeclaration [PR106311] Message-ID: References: <20220715152920.693196-1-polacek@redhat.com> <025f644d-be71-707b-22a3-cbdeb212517f@redhat.com> MIME-Version: 1.0 In-Reply-To: <025f644d-be71-707b-22a3-cbdeb212517f@redhat.com> User-Agent: Mutt/2.2.6 (2022-06-05) X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline X-Spam-Status: No, score=-13.8 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_LOW, SPF_HELO_NONE, SPF_NONE, TXREP 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: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Marek Polacek via Gcc-patches From: Marek Polacek Reply-To: Marek Polacek Cc: GCC Patches Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1738433126584119719?= X-GMAIL-MSGID: =?utf-8?q?1739351274480522925?= On Fri, Jul 22, 2022 at 05:21:58PM -0400, Jason Merrill wrote: > On 7/15/22 11:29, Marek Polacek wrote: > > Here we ICE trying to get DECL_SOURCE_LOCATION of the parm that happens > > to be error_mark_node in this ill-formed test. I kept running into this > > while reducing code, so it'd be good to have it fixed. > > > > Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk? > > > > PR c++/106311 > > > > gcc/cp/ChangeLog: > > > > * pt.cc (redeclare_class_template): Check DECL_P before accessing > > DECL_SOURCE_LOCATION. > > > > gcc/testsuite/ChangeLog: > > > > * g++.dg/template/redecl5.C: New test. > > --- > > gcc/cp/pt.cc | 3 ++- > > gcc/testsuite/g++.dg/template/redecl5.C | 5 +++++ > > 2 files changed, 7 insertions(+), 1 deletion(-) > > create mode 100644 gcc/testsuite/g++.dg/template/redecl5.C > > > > diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc > > index 718dfa5bfa8..0a294e91a79 100644 > > --- a/gcc/cp/pt.cc > > +++ b/gcc/cp/pt.cc > > @@ -6377,7 +6377,8 @@ redeclare_class_template (tree type, tree parms, tree cons) > > { > > auto_diagnostic_group d; > > error ("template parameter %q+#D", tmpl_parm); > > - inform (DECL_SOURCE_LOCATION (parm), "redeclared here as %q#D", parm); > > + inform (DECL_P (parm) ? DECL_SOURCE_LOCATION (parm) : input_location, > > + "redeclared here as %q#D", parm); > > If we're checking DECL_P, probably we also should avoid passing it to %q#D > if it's false? Right, I suppose printing "" isn't all that helpful. How about this? Bootstrapped/regtested on x86_64-pc-linux-gnu, ok for trunk? -- >8 -- Here we ICE trying to get DECL_SOURCE_LOCATION of the parm that happens to be error_mark_node in this ill-formed test. I kept running into this while reducing code, so it'd be good to have it fixed. PR c++/106311 gcc/cp/ChangeLog: * pt.cc (redeclare_class_template): Check DECL_P before accessing DECL_SOURCE_LOCATION. gcc/testsuite/ChangeLog: * g++.dg/template/redecl5.C: New test. --- gcc/cp/pt.cc | 5 ++++- gcc/testsuite/g++.dg/template/redecl5.C | 5 +++++ 2 files changed, 9 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/template/redecl5.C base-commit: 16aafa3194d4851a07cc204f56a5f0618f77e5d7 diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index c415db304c9..6c581fe0fb7 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -6377,7 +6377,10 @@ redeclare_class_template (tree type, tree parms, tree cons) { auto_diagnostic_group d; error ("template parameter %q+#D", tmpl_parm); - inform (DECL_SOURCE_LOCATION (parm), "redeclared here as %q#D", parm); + if (DECL_P (parm)) + inform (DECL_SOURCE_LOCATION (parm), "redeclared here as %q#D", parm); + else + inform (input_location, "redeclared here"); return false; } diff --git a/gcc/testsuite/g++.dg/template/redecl5.C b/gcc/testsuite/g++.dg/template/redecl5.C new file mode 100644 index 00000000000..fb2d698e6bc --- /dev/null +++ b/gcc/testsuite/g++.dg/template/redecl5.C @@ -0,0 +1,5 @@ +// PR c++/106311 +// { dg-do compile } + +template struct array; // { dg-error "template parameter" } +template struct array { }; // { dg-error "declared" }