tests/cases/compiler/newOnInstanceSymbol.ts(3,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. ==== tests/cases/compiler/newOnInstanceSymbol.ts (1 errors) ==== class C {} var x = new C(); // should be ok new x(); // should error ~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.