Thrift compiler does not error when duplicate method names are present

Thrift does not support method overloading. However, the Thrift compiler reports success when duplicate methods are seen in a service definition.

Thrift compiles this successfully, however the generated code will not compile.

#!/usr/local/bin/thrift --gen java
namespace java tutorial
service Calculator {
    i32 add(1:i32 num1, 2:i32 num2),
    string add(1:string str1, 2:string str2),
}