4163 – if(bool = bool) results in ill-worded error

The following code:
bool x, y;
if(x = y) {}
results in the following error:
Error: '=' does not give a boolean result
Which is clearly not a correct message. A better message would be something like:
Error: '=' cannot be used inside an if condition

Be careful with the wording, because this is allowed in D:
if(bool c = !b)
Writing a compiler requires literary expression skills :-)
A possible error message, that looks too much complex:
Error: if(x = y) is now allowed, use if(T x = y) or if((x = y) == z).

*** This issue has been marked as a duplicate of issue 2532 ***