bignum library: fixed IS IDENTICAL

HISTORY.md

@@ -50,6 +50,7 @@
 * blocks: tweaked blocks layout for hidden expansion slots
 * blocks, objects, store, threads: made SEND blocks expandable for receivers and renamed them back to BROADCAST 
 * threads: deep copy atomic lists sent from one scene to another
+* bignum library: fixed IS IDENTICAL
 
 ### 2021-10-21
 * threads, objects: make "when I receive 'any message'" hat scripts threadsafe (uninterruptable by other messages)

libraries/bignums.js

@@ -266,7 +266,7 @@ function loadBlocks (useBigNums) {
             reportIsIdentical: function (a, b) {
                 x = parseNumber(a);
                 y = parseNumber(b);
-                if (Number.isNaN(x) || Number.isNaN(y)) return originalPrims.reportIsIdentical(a, b);
+                if (Number.isNaN(x) || Number.isNaN(y)) return originalPrims.reportIsIdentical.call(this, a, b);
                 return fn['='](x, y);
             },
             reportMonadic: function (fname, n) {