shithub: mc

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Fix mistake in folding.

    x % 0 is crash. x % 1 is 0.

--- a/parse/fold.c

+++ b/parse/fold.c

@@ -182,9 +182,12 @@

 			r = val(n->loc, a / b, exprtype(n));

 		break;

 	case Omod:

-		/* x%1 = x */

+		/* x%0 = error */

 		if (isintval(args[1], 0))

-			r = args[0];

+			fatal(args[1], "division by zero");

+		/* x%1 = 0 */

+		if (isintval(args[1], 1))

+			r = val(n->loc, 0, exprtype(n));

 		if (getintlit(args[0], &a) && getintlit(args[1], &b))

 			r = val(n->loc, a % b, exprtype(n));

 		break;