pinskia pointed out that my recent change to reject anonymous structs with bases was relevant to this PR. But we still ICEd after giving that error; this fixes the ICE.
Tested x86_64-pc-linux-gnu, applying to trunk. PR c++/96636 gcc/cp/ChangeLog: * decl.c (fixup_anonymous_aggr): Clear TYPE_NEEDS_CONSTRUCTING after error. gcc/testsuite/ChangeLog: * g++.dg/ext/anon-struct9.C: New test. --- gcc/cp/decl.c | 6 +++++- gcc/testsuite/g++.dg/ext/anon-struct9.C | 9 +++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/ext/anon-struct9.C diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c index e4be6be1819..6fa6b9adc87 100644 --- a/gcc/cp/decl.c +++ b/gcc/cp/decl.c @@ -5094,7 +5094,11 @@ fixup_anonymous_aggr (tree t) tree field, type; if (BINFO_N_BASE_BINFOS (TYPE_BINFO (t))) - error_at (location_of (t), "anonymous struct with base classes"); + { + error_at (location_of (t), "anonymous struct with base classes"); + /* Avoid ICE after error on anon-struct9.C. */ + TYPE_NEEDS_CONSTRUCTING (t) = false; + } for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field)) if (TREE_CODE (field) == FIELD_DECL) diff --git a/gcc/testsuite/g++.dg/ext/anon-struct9.C b/gcc/testsuite/g++.dg/ext/anon-struct9.C new file mode 100644 index 00000000000..56759429620 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/anon-struct9.C @@ -0,0 +1,9 @@ +// PR c++/96636 +// { dg-options "" } + +typedef class { + class a {}; + class : virtual a {}; // { dg-error "anonymous struct with base" } +} b; +void foo(){ b();} + base-commit: 4c4249b71de3b15ba1e176ce90a57fb7bc54b917 prerequisite-patch-id: 62730bcaf1f07786fd756efb6f3bbd94d778c092 -- 2.27.0