What I'd like to see in Go 2.0(sethvargo.com)

  // This is nice because err only exists within the if so we don't have to 
  // reuse a variable or invent new names both of which are untidy and have potential 
  // to cause errors (esp when copy-pasting):
  if err := someoperation(); err != nil; {
    // Handle the error
  }


  // This however won't work:  
  func doThing() string {    
     result := "OK" 
     
      if result, err := somethingelse(); err != nil { // result does not need to be created but err does so we cannot do this.
          return "ERROR"  
      }
    

   return result
  }

    const x = 1 // x is a compile time alias for the untyped abstract number 1
    var x := 1  // define x at runtime to be (int)1, x is mutable
    val x := 1  // define x at runtime to be (int)1, x is immutable

    func contains(s []int, e int) bool {
        for _, a := range s {
            if a == e {
                return true
            }
        }
        return false
    }

    1. a unified improved *error* in stdlib with stack trace support.
    2. a unified log interface(mentioned)
    3. a STL library like c++
    4. shared library support so we dont have 100 static binaries that among them each have 90% of duplicated content. go shall support shared libraries/modules officially.