From @zoffixznet

The error message can probably be improved, as from user's perspective, there's no "de" parameter at hand​:

<Zoffix> m​: say 1/1.WHAT
<camelia> rakudo-moar a7ea8e​: OUTPUT«Parameter 'de' requires an instance of type Int, but a type object was passed. Did you forget a .new?␤ in block <unit> at /tmp/ht6mu8fx2K line 1␤␤»

Relevant IRC conversation​: http://irclog.perlgeek.de/perl6/2015-12-28#i_11788457

From @zoffixznet

here's related one for the numerator​:

<Zoffix> m​: say Int/Int.WHAT
<camelia> rakudo-moar a7ea8e​: OUTPUT«Parameter 'nu' requires an instance of type Int, but a type object was passed. Did you forget a .new?␤ in block <unit> at /tmp/LnnSdb0IY8 line 1␤␤»

From @coke

On Sun Dec 27 18​:27​:03 2015, cpan@​zoffix.com wrote​:

here's related one for the numerator​:

<Zoffix> m​: say Int/Int.WHAT
<camelia> rakudo-moar a7ea8e​: OUTPUT«Parameter 'nu' requires an
instance of type Int, but a type object was passed. Did you forget a
.new?␤ in block <unit> at /tmp/LnnSdb0IY8 line 1␤␤»

So, the issue here is that because of the precedence, we're trying to divide by a type object (1/1.WHAT) === 1/(1.WHAT).

But, nu/de are not the names of the Rat attributes. I suspect the issue might be with src/core/Rat.pm's

  sub DIVIDE_NUMBERS(Int​:D \nu, Int​:D \de, $t1, $t2) {

perhaps renaming those args is the simplest fix here.

--
Will "Coke" Coleda

From @zoffixznet

♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥
For SQUASHathoners​:
♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥

The likely fix would involve add `​:D` type constraint smileys to parameters of all of these operators​: https://github.com/rakudo/rakudo/blob/98fae3d84/src/core/Rat.pm#L86-L224

We don't test textual content of error messages in roast, so the tests for this ticket will likely need to go into rakudo's test suit instead​: https://github.com/rakudo/rakudo/blob/nom/t/05-messages/01-errors.t

From @zoffixznet

Fixed and tested in rakudo/rakudo#1359

@zoffixznet - Status changed from 'new' to 'resolved'