commit a3097d05bbd05012975d95d6682329f145368ed2
from: Omar Polo <op@omarpolo.com>
date: Wed Aug 04 17:40:42 2021 UTC

improve error message on invalid expr. for const

commit - 2e261d49a4da00c13f3151a7b02705254656b2b3
commit + a3097d05bbd05012975d95d6682329f145368ed2
blob - 7fab571c5ccbb281f7031ca50d5dc0543baf8ace
blob + b8eae69506de058d29202e1e6b4d3cf39aae0370
--- np.y
+++ np.y
@@ -140,7 +140,7 @@ mconst	: consti nl | mconst consti nl ;
 
 consti	: SYMBOL '=' expr {
 		if (!global_set($1, $3)) {
-			yyerror("constant expression is not a literal");
+			yyerror("can't set %s: illegal expression", $1);
 			free($1);
 			free_op($3);
 			YYERROR;