isEmptyAnonymousObjectType shouldn't require full member resolution

ahejlsberg · ahejlsberg · commit 034afaffbaef · 2020-05-19T20:10:29.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -15308,7 +15308,9 @@ namespace ts {
         }
 
         function isEmptyAnonymousObjectType(type: Type) {
-            return !!(getObjectFlags(type) & ObjectFlags.Anonymous) && isEmptyObjectType(type);
+            return !!(getObjectFlags(type) & ObjectFlags.Anonymous && (
+                (<ResolvedType>type).members && isEmptyResolvedType(<ResolvedType>type) ||
+                type.symbol && type.symbol.flags & SymbolFlags.TypeLiteral && getMembersOfSymbol(type.symbol).size === 0));
         }
 
         function isStringIndexSignatureOnlyType(type: Type): boolean {

Original file line number	Diff line number	Diff line change
`@@ -15308,7 +15308,9 @@ namespace ts {`
`15308`	`15308`	`}`
`15309`	`15309`
`15310`	`15310`	`function isEmptyAnonymousObjectType(type: Type) {`
`15311`		`- return !!(getObjectFlags(type) & ObjectFlags.Anonymous) && isEmptyObjectType(type);`
	`15311`	`+ return !!(getObjectFlags(type) & ObjectFlags.Anonymous && (`
	`15312`	`+ (<ResolvedType>type).members && isEmptyResolvedType(<ResolvedType>type) \|\|`
	`15313`	`+ type.symbol && type.symbol.flags & SymbolFlags.TypeLiteral && getMembersOfSymbol(type.symbol).size === 0));`
`15312`	`15314`	`}`
`15313`	`15315`
`15314`	`15316`	`function isStringIndexSignatureOnlyType(type: Type): boolean {`