!props -> props.length === 0 (why dont we warn on that ffs)

weswigham · weswigham · commit eb21c09bdbde · 2019-03-14T14:47:21.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -7810,7 +7810,7 @@ namespace ts {
                 }
             }
             const props = arrayFrom(propSet.values());
-            if (!props) {
+            if (props.length === 0) {
                 return undefined;
             }
             if (props.length === 1 && !(checkFlags & CheckFlags.Partial) && !indexTypes) {

Original file line number	Diff line number	Diff line change
`@@ -7810,7 +7810,7 @@ namespace ts {`
`7810`	`7810`	`}`
`7811`	`7811`	`}`
`7812`	`7812`	`const props = arrayFrom(propSet.values());`
`7813`		`- if (!props) {`
	`7813`	`+ if (props.length === 0) {`
`7814`	`7814`	`return undefined;`
`7815`	`7815`	`}`
`7816`	`7816`	`if (props.length === 1 && !(checkFlags & CheckFlags.Partial) && !indexTypes) {`