Halt and catch fire: Difference between revisions

=={{header|Raku}}==

<lang perl6>++8</lang>

Syntactically: Valid.

Semantically: Change the mathematical concept of 8 to 9, either in your whole computer, or maybe the whole universe.

Fails with this run-time error:

{{out}}

<pre>Cannot resolve caller prefix:<++>(Int:D); the following candidates

match the type but require mutable arguments:

(Mu:D $a is rw)

(Int:D $a is rw --> Int:D)

The following do not match for other reasons:

(Bool $a is rw)

(Mu:U $a is rw)

(Num:D $a is rw)

(Num:U $a is rw)

(int $a is rw --> int)

(num $a is rw --> num)

in block <unit> at -e line 1</pre>