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[130.44.159.43]) by smtp.gmail.com with ESMTPSA id d71-20020ae9ef4a000000b007469dfd4dd5sm4329651qkg.106.2023.03.22.20.23.58 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Mar 2023 20:23:58 -0700 (PDT) From: Jason Merrill To: gcc-patches@gcc.gnu.org Subject: [pushed] c++: local class in nested generic lambda [PR109241] Date: Wed, 22 Mar 2023 23:23:55 -0400 Message-Id: <20230323032355.2678239-1-jason@redhat.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-Spam-Status: No, score=-12.6 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_H2,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 List-Id: Tested x86_64-pc-linux-gnu, applying to trunk. -- 8< -- In this testcase, the tree walk to look for bare parameter packs was confused by finding a type with no TREE_BINFO. But it should be fine that it's unset; we already checked for unexpanded packs at parse time. I also tried doing the partial instantiation of the local class, which is probably the long-term direction we want to go, but for stage 4 let's go with this safer change. PR c++/109241 gcc/cp/ChangeLog: * pt.cc (find_parameter_packs_r): Handle null TREE_BINFO. gcc/testsuite/ChangeLog: * g++.dg/cpp1y/lambda-generic-local-class2.C: New test. --- gcc/cp/pt.cc | 12 ++++++++---- .../g++.dg/cpp1y/lambda-generic-local-class2.C | 13 +++++++++++++ 2 files changed, 21 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp1y/lambda-generic-local-class2.C diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index 90bcaa78701..40deedc9ba9 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -4069,10 +4069,14 @@ find_parameter_packs_r (tree *tp, int *walk_subtrees, void* data) case TAG_DEFN: t = TREE_TYPE (t); if (CLASS_TYPE_P (t)) - /* Local class, need to look through the whole definition. */ - for (tree bb : BINFO_BASE_BINFOS (TYPE_BINFO (t))) - cp_walk_tree (&BINFO_TYPE (bb), &find_parameter_packs_r, - ppd, ppd->visited); + { + /* Local class, need to look through the whole definition. + TYPE_BINFO might be unset for a partial instantiation. */ + if (TYPE_BINFO (t)) + for (tree bb : BINFO_BASE_BINFOS (TYPE_BINFO (t))) + cp_walk_tree (&BINFO_TYPE (bb), &find_parameter_packs_r, + ppd, ppd->visited); + } else /* Enum, look at the values. */ for (tree l = TYPE_VALUES (t); l; l = TREE_CHAIN (l)) diff --git a/gcc/testsuite/g++.dg/cpp1y/lambda-generic-local-class2.C b/gcc/testsuite/g++.dg/cpp1y/lambda-generic-local-class2.C new file mode 100644 index 00000000000..83856de1f41 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp1y/lambda-generic-local-class2.C @@ -0,0 +1,13 @@ +// PR c++/109241 +// { dg-do compile { target c++14 } } +// { dg-options "" } no pedantic + +void g() { + [](auto) { + [](auto) { + ({ + struct A {}; + }); + }; + }(1); +} base-commit: cd0c433e5faba9a18f64881cd761a53a530aa798 -- 2.31.1