From @zoffixznet

17​:09 brokenchicken bisect​: (1,2,3).Array[0]++
17​:09 bisectable6 brokenchicken, Bisecting by exit code (old=2015.12 new=fa36f8f). Old exit code​: 0
17​:09 brokenchicken, bisect log​: https://gist.github.com/f913​47264071e248ff25f7f7cb01f917
17​:09 brokenchicken, (2017-01-12) rakudo/rakudo@​fab1a14f7997be923544b8a2e22865a04441bd21

From @zoffixznet

Clickable link to bisectable commit​: rakudo/rakudo@fab1a14

<ZoffixW> star​: say (1,2,3).Array[0]++
<camelia> star-m 2016.10​: OUTPUT«1␤»
<ZoffixW> m​: say (1,2,3).Array[0]++
<camelia> rakudo-moar 35a3c0​: OUTPUT«Cannot resolve caller postfix​:<++>(Int); the following candidates␤match the type but require mutable arguments​:␤ (Mu​:D $a is rw)␤ (Int​:D $a is rw)␤␤The following do not match for other reasons​:␤ (Bool​:D $a is rw)␤ (Bool​:U $a is rw…»

From @zoffixznet

Fixed in rakudo/rakudo@ae050f998a

From @zoffixznet

Tests in Raku/roast@890ca310e7

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