+[[test.y:24.36-41: error: invalid reference: '$cond1'
+test.y:23.11-24.62: symbol not found in production: cond1
+test.y:26.43-53: error: invalid reference: '$stmt.field'
+test.y:25.11-26.60: symbol not found in production: stmt
+test.y:25.35-38: possibly meant: $then.field, hiding $stmt.field at $4
+test.y:28.43-52: error: invalid reference: '$stmt.list'
+test.y:27.11-28.59: symbol not found in production: stmt
+test.y:27.30-38: possibly meant: $[stmt.list] at $4
+test.y:30.43-46: error: ambiguous reference: '$xyz'
+test.y:29.35-37: refers to: $xyz at $4
+test.y:29.50-52: refers to: $xyz at $6
+test.y:32.43-52: error: invalid reference: '$stmt.list'
+test.y:31.11-32.63: symbol not found in production: stmt
+test.y:31.40-43: possibly meant: $then, hiding $[stmt.list] at $4
+test.y:31.61-64: possibly meant: $else, hiding $[stmt.list] at $6
+test.y:34.43-58: error: invalid reference: '$stmt.list.field'
+test.y:33.11-34.69: symbol not found in production: stmt
+test.y:33.40-43: possibly meant: $then.field, hiding $[stmt.list].field at $4
+test.y:33.61-64: possibly meant: $else.field, hiding $[stmt.list].field at $6
+test.y:36.43-54: error: invalid reference: '$[stmt.list]'
+test.y:35.11-36.71: symbol not found in production: stmt.list
+test.y:35.40-43: possibly meant: $then, hiding $[stmt.list] at $4
+test.y:35.61-64: possibly meant: $else, hiding $[stmt.list] at $6
+test.y:38.43-49: error: invalid reference: '$then.1'
+test.y:37.11-38.60: symbol not found in production: then
+test.y:37.40-45: possibly meant: $[then.1] at $4
+test.y:40.43-55: error: invalid reference: '$then.1.field'
+test.y:39.11-40.66: symbol not found in production: then
+test.y:39.40-45: possibly meant: $[then.1].field at $4
+test.y:42.44-50: error: invalid reference: '$stmt.x'
+test.y:41.12-42.57: symbol not found in production: stmt
+test.y:41.36-41: possibly meant: $[stmt.x].x, hiding $stmt.x at $4
+test.y:41.36-41: possibly meant: $[stmt.x] at $4
+test.y:44.13-22: error: invalid reference: '$if-stmt-a'
+test.y:43.12-44.59: symbol not found in production: if
+test.y:43.1-9: possibly meant: $[if-stmt-a] at $$
+test.y:46.46-54: error: invalid reference: '$then-a.f'
+test.y:45.12-46.65: symbol not found in production: then
+test.y:45.41-46: possibly meant: $[then-a].f at $4
+]])
+
+AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
+[[test.y:24.36-41: error: invalid reference: '$cond1'
+ { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
+ ^^^^^^