From: erg <devnull@localhost>
Date: Tue, 22 Jul 2008 15:28:47 +0000 (+0000)
Subject: In string-to-int conversion, handle possibility that a NULL string,
X-Git-Tag: LAST_LIBGRAPH~32^2~3829
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4889949b307df090eadd9182d9cf89a4d6b6c950;p=graphviz

In string-to-int conversion, handle possibility that a NULL string,
generated internally, may have to be handled.
---

diff --git a/lib/expr/exeval.c b/lib/expr/exeval.c
index fd174d9a2..88163ea37 100644
--- a/lib/expr/exeval.c
+++ b/lib/expr/exeval.c
@@ -1619,9 +1619,13 @@ static Extype_t eval(Expr_t * ex, register Exnode_t * expr, void *env)
 				       data.operand.right->data.variable.
 				       symbol : (Exid_t *) 0, 0,
 				       ex->disc)) {
-		tmp.data.constant.value.integer = strToL(v.string, &e);
-		if (*e)
-		    tmp.data.constant.value.integer = *v.string != 0;
+		if (v.string) {
+		    tmp.data.constant.value.integer = strToL(v.string, &e);
+		    if (*e)
+			tmp.data.constant.value.integer = *v.string != 0;
+		}
+		else
+		    tmp.data.constant.value.integer = 0;
 	    }
 	    tmp.type = INTEGER;
 	    return tmp.data.constant.value;