Fixed an issue with top function type being callable with no arguments

src/compiler/checker.ts

@@ -34609,7 +34609,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
 
     function getNonArrayRestType(signature: Signature) {
         const restType = getEffectiveRestType(signature);
-        return restType && !isArrayType(restType) && !isTypeAny(restType) && (getReducedType(restType).flags & TypeFlags.Never) === 0 ? restType : undefined;
+        return restType && !isArrayType(restType) && !isTypeAny(restType) ? restType : undefined;
     }
 
     function getTypeOfFirstParameterOfSignature(signature: Signature) {

tests/baselines/reference/topFunctionTypeNotCallable.errors.txt

@@ -0,0 +1,11 @@
+tests/cases/compiler/topFunctionTypeNotCallable.ts(4,1): error TS2345: Argument of type '[]' is not assignable to parameter of type 'never'.
+
+
+==== tests/cases/compiler/topFunctionTypeNotCallable.ts (1 errors) ====
+    // repro from #48840
+
+    declare let foo: (...args: never) => void;
+    foo(); // error
+    ~~~~~
+!!! error TS2345: Argument of type '[]' is not assignable to parameter of type 'never'.
+

tests/baselines/reference/topFunctionTypeNotCallable.symbols

@@ -0,0 +1,10 @@
+=== tests/cases/compiler/topFunctionTypeNotCallable.ts ===
+// repro from #48840
+
+declare let foo: (...args: never) => void;
+>foo : Symbol(foo, Decl(topFunctionTypeNotCallable.ts, 2, 11))
+>args : Symbol(args, Decl(topFunctionTypeNotCallable.ts, 2, 18))
+
+foo(); // error
+>foo : Symbol(foo, Decl(topFunctionTypeNotCallable.ts, 2, 11))
+

tests/baselines/reference/topFunctionTypeNotCallable.types

@@ -0,0 +1,11 @@
+=== tests/cases/compiler/topFunctionTypeNotCallable.ts ===
+// repro from #48840
+
+declare let foo: (...args: never) => void;
+>foo : (...args: never) => void
+>args : never
+
+foo(); // error
+>foo() : void
+>foo : (...args: never) => void
+

tests/cases/compiler/topFunctionTypeNotCallable.ts

@@ -0,0 +1,7 @@
+// @strict: true
+// @noEmit: true
+
+// repro from #48840
+
+declare let foo: (...args: never) => void;
+foo(); // error