gccrs: transcriber: Do not infinite loop if the current parsed node is an error

gcc/rust/ChangeLog:

	* expand/rust-macro-expand.cc (parse_many): Return early from parsing
	loop if we encounter an error, and emit that error in the meantime.

Co-authored-by: philberty <philip.herron@embecosm.com>

diff --git a/gcc/rust/expand/rust-macro-expand.cc b/gcc/rust/expand/rust-macro-expand.cc
index df258bd..ed1b838 100644 (file)
--- a/gcc/rust/expand/rust-macro-expand.cc
+++ b/gcc/rust/expand/rust-macro-expand.cc
@@ -731,6 +731,14 @@ parse_many (Parser<MacroInvocLexer> &parser, TokenId &delimiter,
        break;
 
       auto node = parse_fn ();
+      if (node.is_error ())
+       {
+         for (auto err : parser.get_errors ())
+           err.emit_error ();
+
+         return AST::ASTFragment::create_error ();
+       }
+
       nodes.emplace_back (std::move (node));
     }