This is a fix for PR c++/39751 which is an ICE-on-invalid regression in
the C++ parser after encountering the end of file. The one line change
is to check that the tokens cached in DECL_PENDING_INLINE_INFO haven't
been purged before processing them in cp_parser_late_parsing_for_member.
2022-03-10 Roger Sayle <roger@nextmovesoftware.com>
gcc/cp/ChangeLog
PR c++/39751
* parser.cc (cp_parser_late_parsing_for_member): Confirm the token
stream hasn't been purged before processing DECL_PENDING_INLINE.
gcc/testsuite/ChangeLog
PR c++/39751
* g++.dg/parse/pr39751.C: New test case.
maybe_begin_member_template_processing (member_function);
/* If the body of the function has not yet been parsed, parse it
- now. */
- if (DECL_PENDING_INLINE_P (member_function))
+ now. Except if the tokens have been purged (PR c++/39751). */
+ if (DECL_PENDING_INLINE_P (member_function)
+ && !DECL_PENDING_INLINE_INFO (member_function)->first->purged_p)
{
tree function_scope;
cp_token_cache *tokens;
--- /dev/null
+/* { dg-do compile } */
+
+template < typename >
+struct A
+{
+A < struct
+{
+f () :
+
+// { dg-excess-errors "" }