yet another SIGNEXTEND fix

cdetrio · cdetrio · commit 9e9cc018cd48 · 2017-06-18T17:24:17.000+02:00
diff --git a/lib/opFns.js b/lib/opFns.js
@@ -133,6 +133,7 @@ module.exports = {
   },
   SIGNEXTEND: function (k, val, runState) {
     k = new BN(k)
+    val = new Buffer(val) // use clone, don't modify object reference
     var extendOnes = false
 
     if (k.cmpn(31) <= 0) {
@@ -146,7 +147,6 @@ module.exports = {
       for (var i = 30 - k; i >= 0; i--) {
         val[i] = extendOnes ? 0xff : 0
       }
-
     }
 
     return val

Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,7 @@ module.exports = {`
`133`	`133`	`},`
`134`	`134`	`SIGNEXTEND: function (k, val, runState) {`
`135`	`135`	`k = new BN(k)`
	`136`	`+ val = new Buffer(val) // use clone, don't modify object reference`
`136`	`137`	`var extendOnes = false`
`137`	`138`
`138`	`139`	`if (k.cmpn(31) <= 0) {`
`@@ -146,7 +147,6 @@ module.exports = {`
`146`	`147`	`for (var i = 30 - k; i >= 0; i--) {`
`147`	`148`	`val[i] = extendOnes ? 0xff : 0`
`148`	`149`	`}`
`149`		`-`
`150`	`150`	`}`
`151`	`151`
`152`	`152`	`return val`