gccrs: Avoid accidental insertion into map

gcc/rust/ChangeLog:

	* resolve/rust-ast-resolve-pattern.cc
	(PatternDeclaration::check_bindings_consistency): Check if
	outer_bindings_map contains an entry before indexing.

Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

diff --git a/gcc/rust/resolve/rust-ast-resolve-pattern.cc b/gcc/rust/resolve/rust-ast-resolve-pattern.cc
index 9b383b722c87039bff3ece0bcc4f422271439e5d..ee84be8942bc51476554fd617acad60ac14a1187 100644 (file)
--- a/gcc/rust/resolve/rust-ast-resolve-pattern.cc
+++ b/gcc/rust/resolve/rust-ast-resolve-pattern.cc
@@ -330,7 +330,8 @@ PatternDeclaration::check_bindings_consistency (
              if (!ident_is_outer_bound && !missing_bindings.count (ident))
                missing_bindings.insert ({ident, inner_info});
 
-             else if (outer_bindings_map[ident] != inner_info
+             else if (outer_bindings_map.count (ident)
+                      && outer_bindings_map[ident] != inner_info
                       && !inconsistent_bindings.count (ident))
                inconsistent_bindings.insert ({ident, inner_info});
            }