From @labster

labster​: r​: sub not-foo { "2" }; say not-foo();
camelia​: rakudo 9ed5c5​: OUTPUT«[31m===[0mSORRY![31m===[0m␤Undeclared
routine​:␤ foo used at line 1␤␤»
labster​: r​: sub so-what { say "nyan"; }; so-what;
camelia​: rakudo 9ed5c5​: OUTPUT«[31m===[0mSORRY![31m===[0m␤Undeclared
routine​:␤ what used at line 1␤␤»
labster​: rn​: sub funny { "​:)" }; sub not-so-funny { ">​:O"}; say funny() and
not-so-funny;
camelia​: rakudo 9ed5c5​: OUTPUT«​:)␤Cannot convert string to number​: radix
(in decimal) expected after '​:' in '​:⏏)' (indicated by ⏏)␤ in method
Numeric at src/gen/CORE.setting​:10020␤ in sub prefix​:<-> at
src/gen/CORE.setting​:2818␤ in sub prefix​:<-> at
src/gen/CORE.setting​:2817␤ in sub prefix​:<…
camelia​: ..niecza v24-40-g31f36d2​: OUTPUT«​:)␤»

From @labster

lizmat++ would like to add that regex-like statements cause the same
problems, so subs like s-foo, m-foo, and rx-foo also cause problems,
though my intuition is that it's a separate bug.

@labster - Status changed from 'new' to 'open'

From @usev6

This works now​:

$ perl6 -e 'sub not-foo { "2" }; say not-foo();'
2

$ perl6 -e 'sub so-what { say "nyan"; }; so-what;'
nyan

$ perl6 -e 'sub m-foo { say "nyan"; }; m-foo;'
nyan

I added three tests to S06-other/misc.t with commit Raku/roast@c3d0fa4d70

I'm closing this ticket as 'resolved'.

@usev6 - Status changed from 'open' to 'resolved'