tests/cases/compiler/invocationExpressionInFunctionParameter.ts(3,24): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
==== tests/cases/compiler/invocationExpressionInFunctionParameter.ts (1 errors) ====
function foo1(val: string) {
}
function foo3(x = foo1(123)) { //should error, 123 is not string
~~~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.