[gcc r16-5603] gccrs: stop an infinite loop at END_OF_FILE

[Arthur Cohen]

https://gcc.gnu.org/g:910bae566ebff5142688971792d13dc5d7274b88

commit r16-5603-g910bae566ebff5142688971792d13dc5d7274b88
Author: Lúcio Boari Fleury <lucboari@gmail.com>
Date:   Fri Nov 21 22:04:25 2025 -0300

    gccrs: stop an infinite loop at END_OF_FILE
    
    gcc/rust/ChangeLog:
    
            * parse/rust-parse-impl.h: Add early exit condition to parsing loop.
    
    Signed-off-by: Lúcio Boari Fleury <lucboari@gmail.com>

Diff:
---
 gcc/rust/parse/rust-parse-impl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/parse/rust-parse-impl.h b/gcc/rust/parse/rust-parse-impl.h
index 0421d6cb80e5..afc701230951 100644
--- a/gcc/rust/parse/rust-parse-impl.h
+++ b/gcc/rust/parse/rust-parse-impl.h
@@ -1861,7 +1861,8 @@ Parser<ManagedTokenSource>::parse_macro_invocation_semi (
 
   t = lexer.peek_token ();
   // parse token trees until the initial delimiter token is found again
-  while (!token_id_matches_delims (t->get_id (), delim_type))
+  while (!token_id_matches_delims (t->get_id (), delim_type)
+	 && t->get_id () != END_OF_FILE)
     {
       std::unique_ptr<AST::TokenTree> tree = parse_token_tree ();