Ensure there's errors

Timer · Timer · commit 4783b6817e58 · 2017-05-19T07:02:36.000-04:00
Fixes facebook#2231
diff --git a/packages/react-error-overlay/src/overlay.js b/packages/react-error-overlay/src/overlay.js
@@ -110,6 +110,10 @@ function renderErrorByIndex(index: number) {
 }
 
 function switchError(offset) {
+  if (errorReferences.length < 1) {
+    return;
+  }
+
   let nextView = currReferenceIndex + offset;
 
   if (nextView < 0) {

Original file line number	Diff line number	Diff line change
`@@ -110,6 +110,10 @@ function renderErrorByIndex(index: number) {`
`110`	`110`	`}`
`111`	`111`
`112`	`112`	`function switchError(offset) {`
	`113`	`+ if (errorReferences.length < 1) {`
	`114`	`+ return;`
	`115`	`+ }`
	`116`	`+`
`113`	`117`	`let nextView = currReferenceIndex + offset;`
`114`	`118`
`115`	`119`	`if (nextView < 0) {`