Protect against jsFS callback error argument being undefined

samhocevar · samhocevar · commit ce5430d75905 · 2022-05-11T17:17:00.000+02:00
diff --git a/compiler/natives/src/syscall/fs_js.go b/compiler/natives/src/syscall/fs_js.go
@@ -23,7 +23,7 @@ func fsCall(name string, args ...interface{}) (js.Value, error) {
 		var res callResult
 
 		if len(args) >= 1 {
-			if jsErr := args[0]; !jsErr.IsNull() {
+			if jsErr := args[0]; !jsErr.IsUndefined() && !jsErr.IsNull() {
 				res.err = mapJSError(jsErr)
 			}
 		}

Original file line number	Diff line number	Diff line change
`@@ -23,7 +23,7 @@ func fsCall(name string, args ...interface{}) (js.Value, error) {`
`23`	`23`	`var res callResult`
`24`	`24`
`25`	`25`	`if len(args) >= 1 {`
`26`		`- if jsErr := args[0]; !jsErr.IsNull() {`
	`26`	`+ if jsErr := args[0]; !jsErr.IsUndefined() && !jsErr.IsNull() {`
`27`	`27`	`res.err = mapJSError(jsErr)`
`28`	`28`	`}`
`29`	`29`	`}`