Test assignability checking of object rests

tests/baselines/reference/objectRestNegative.errors.txt

@@ -1,14 +1,27 @@
 tests/cases/conformance/types/rest/objectRestNegative.ts(2,10): error TS2462: A rest element must be last in a destructuring pattern
-tests/cases/conformance/types/rest/objectRestNegative.ts(3,31): error TS2462: A rest element must be last in a destructuring pattern
-tests/cases/conformance/types/rest/objectRestNegative.ts(6,17): error TS2700: Rest types may only be created from object types.
-tests/cases/conformance/types/rest/objectRestNegative.ts(11,9): error TS2701: The target of an object rest assignment must be a variable or a property access.
+tests/cases/conformance/types/rest/objectRestNegative.ts(6,10): error TS2322: Type '{ a: number; }' is not assignable to type '{ a: string; }'.
+  Types of property 'a' are incompatible.
+    Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/rest/objectRestNegative.ts(9,31): error TS2462: A rest element must be last in a destructuring pattern
+tests/cases/conformance/types/rest/objectRestNegative.ts(12,17): error TS2700: Rest types may only be created from object types.
+tests/cases/conformance/types/rest/objectRestNegative.ts(17,9): error TS2701: The target of an object rest assignment must be a variable or a property access.
 
 
-==== tests/cases/conformance/types/rest/objectRestNegative.ts (4 errors) ====
+==== tests/cases/conformance/types/rest/objectRestNegative.ts (5 errors) ====
     let o = { a: 1, b: 'no' };
     var { ...mustBeLast, a } = o;
              ~~~~~~~~~~
 !!! error TS2462: A rest element must be last in a destructuring pattern
+    
+    var b: string;
+    let notAssignable: { a: string };
+    ({ b, ...notAssignable } = o);
+             ~~~~~~~~~~~~~
+!!! error TS2322: Type '{ a: number; }' is not assignable to type '{ a: string; }'.
+!!! error TS2322:   Types of property 'a' are incompatible.
+!!! error TS2322:     Type 'number' is not assignable to type 'string'.
+    
+    
     function stillMustBeLast({ ...mustBeLast, a }: { a: number, b: string }): void {
                                   ~~~~~~~~~~
 !!! error TS2462: A rest element must be last in a destructuring pattern

tests/baselines/reference/objectRestNegative.js

@@ -1,6 +1,12 @@
 //// [objectRestNegative.ts]
 let o = { a: 1, b: 'no' };
 var { ...mustBeLast, a } = o;
+
+var b: string;
+let notAssignable: { a: string };
+({ b, ...notAssignable } = o);
+
+
 function stillMustBeLast({ ...mustBeLast, a }: { a: number, b: string }): void {
 }
 function generic<T extends { x, y }>(t: T) {
@@ -24,6 +30,9 @@ var __rest = (this && this.__rest) || function (s, e) {
 };
 var o = { a: 1, b: 'no' };
 var a = o.a;
+var b;
+var notAssignable;
+(b = o.b, o, notAssignable = __rest(o, ["b"]));
 function stillMustBeLast(_a) {
     var a = _a.a;
 }

tests/baselines/reference/objectSpreadNoTransform.js

@@ -2,7 +2,7 @@
 const y = { a: 'yes', b: 'no' };
 const o = { x: 1, ...y };
 var b;
-var rest;
+var rest: any;
 ({ b, ...rest } = o);
 
 

tests/baselines/reference/objectSpreadNoTransform.symbols

@@ -12,7 +12,7 @@ const o = { x: 1, ...y };
 var b;
 >b : Symbol(b, Decl(objectSpreadNoTransform.ts, 2, 3))
 
-var rest;
+var rest: any;
 >rest : Symbol(rest, Decl(objectSpreadNoTransform.ts, 3, 3))
 
 ({ b, ...rest } = o);

tests/baselines/reference/objectSpreadNoTransform.types

@@ -17,7 +17,7 @@ const o = { x: 1, ...y };
 var b;
 >b : any
 
-var rest;
+var rest: any;
 >rest : any
 
 ({ b, ...rest } = o);

tests/cases/conformance/types/rest/objectRestNegative.ts

@@ -1,5 +1,11 @@
 let o = { a: 1, b: 'no' };
 var { ...mustBeLast, a } = o;
+
+var b: string;
+let notAssignable: { a: string };
+({ b, ...notAssignable } = o);
+
+
 function stillMustBeLast({ ...mustBeLast, a }: { a: number, b: string }): void {
 }
 function generic<T extends { x, y }>(t: T) {

tests/cases/conformance/types/spread/objectSpreadNoTransform.ts

@@ -2,5 +2,5 @@
 const y = { a: 'yes', b: 'no' };
 const o = { x: 1, ...y };
 var b;
-var rest;
+var rest: any;
 ({ b, ...rest } = o);