fix isubn sign issue

When we sub number from BN instance and this number equal to number in BN instance we receive zero with negative sign.
indutny · Feb 25, 2019 · 7d12569 · 7d12569
1 parent 24cc2dd
commit 7d12569
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/bn.js b/lib/bn.js
@@ -2160,7 +2160,7 @@
 
     // Possible sign change
     if (this.negative !== 0) {
-      if (this.length === 1 && (this.words[0] | 0) < num) {
+      if (this.length === 1 && (this.words[0] | 0) <= num) {
         this.words[0] = num - (this.words[0] | 0);
         this.negative = 0;
         return this;