+AT_BISON_CHECK([-fcaret -o input.c input.y], 1, [],
+[[input.y:1.10-2.0: error: missing '"' at end of line
+ %token A "a
+ ^^
+input.y:4.10-5.0: error: missing "'" at end of line
+ %token C '1
+ ^^
+input.y:14.11-15.0: error: missing "'" at end of line
+ %type <f> 'a
+ ^^
+input.y:16.11-17.0: error: missing '"' at end of line
+ %type <f> "a
+ ^^
+input.y:19.13-20.0: error: missing '}' at end of file
+ %destructor { free ($$)
+ ^^^^^^^^^^^
+input.y:20.1: error: syntax error, unexpected end of file
+]])
+