Large non-Infinite gists are eager

[0racle]

The Problem

Large, non-infinte sequences should gist lazily, showing the fist 100 elements. Instead, Rakudo seems to be evaluating the entire sequence before it gists. Suspect the sequence is not being detected as lazy.

Expected Behavior

As per old compiler version

> $*PERL.compiler
rakudo (2018.04.1)
> { (2, 4 ... 1_000_000).gist; say (now - ENTER now).Int }
0

Actual Behavior

Recent compiler version

> $*PERL.compiler
rakudo (2019.03.1.427.gb.279670)
> { (2, 4 ... 1_000_000).gist; say (now - ENTER now).Int }
15

Bisectable points to this commit as the regression.

[lizmat]

Reverted with 2566db7

[AlexDaniel]

What about tests?

[AlexDaniel]

How to test:

(0, { $_ == 1000 ?? die ‘ouch!’ !! $_ + 1 } ... 99999).gist