Fix startup crash when redefining global Array with @nolib

Author: hayatexe

src/compiler/checker.ts

@@ -17746,7 +17746,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         const readonly = isReadonlyTypeOperator(node.parent);
         const elementType = getArrayElementTypeNode(node);
         if (elementType) {
-            return readonly ? globalReadonlyArrayType : globalArrayType;
+            return (readonly ? globalReadonlyArrayType : globalArrayType) || emptyGenericType;
         }
         const elementFlags = map((node as TupleTypeNode).elements, getTupleElementFlags);
         return getTupleTargetType(elementFlags, readonly, map((node as TupleTypeNode).elements, memberIfLabeledElementDeclaration));

tests/baselines/reference/bug57009.errors.txt

@@ -0,0 +1,25 @@
+error TS2317: Global type 'Array' must have 1 type parameter(s).
+error TS2318: Cannot find global type 'Boolean'.
+error TS2318: Cannot find global type 'CallableFunction'.
+error TS2318: Cannot find global type 'Function'.
+error TS2318: Cannot find global type 'IArguments'.
+error TS2318: Cannot find global type 'NewableFunction'.
+error TS2318: Cannot find global type 'Number'.
+error TS2318: Cannot find global type 'Object'.
+error TS2318: Cannot find global type 'RegExp'.
+error TS2318: Cannot find global type 'String'.
+
+
+!!! error TS2317: Global type 'Array' must have 1 type parameter(s).
+!!! error TS2318: Cannot find global type 'Boolean'.
+!!! error TS2318: Cannot find global type 'CallableFunction'.
+!!! error TS2318: Cannot find global type 'Function'.
+!!! error TS2318: Cannot find global type 'IArguments'.
+!!! error TS2318: Cannot find global type 'NewableFunction'.
+!!! error TS2318: Cannot find global type 'Number'.
+!!! error TS2318: Cannot find global type 'Object'.
+!!! error TS2318: Cannot find global type 'RegExp'.
+!!! error TS2318: Cannot find global type 'String'.
+==== bug57009.ts (0 errors) ====
+    type Array<T> = T[];
+    

tests/baselines/reference/bug57009.js

@@ -0,0 +1,8 @@
+//// [tests/cases/compiler/bug57009.ts] ////
+
+//// [bug57009.ts]
+type Array<T> = T[];
+
+
+//// [bug57009.js]
+"use strict";

tests/baselines/reference/bug57009.symbols

@@ -0,0 +1,8 @@
+//// [tests/cases/compiler/bug57009.ts] ////
+
+=== bug57009.ts ===
+type Array<T> = T[];
+>Array : Symbol(Array, Decl(bug57009.ts, 0, 0))
+>T : Symbol(T, Decl(bug57009.ts, 0, 11))
+>T : Symbol(T, Decl(bug57009.ts, 0, 11))
+

tests/baselines/reference/bug57009.types

@@ -0,0 +1,7 @@
+//// [tests/cases/compiler/bug57009.ts] ////
+
+=== bug57009.ts ===
+type Array<T> = T[];
+>Array : {}
+>      : ^^
+

tests/cases/compiler/bug57009.ts

@@ -0,0 +1,3 @@
+// @noLib: true
+
+type Array<T> = T[];