[perl #114388] LAT error when using s[] = "rea"

[Jimmy Zhuo]

# New Ticket Created by  "Jimmy Zhuo" 
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# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=114388 >


JimmyZ_ r: s[ea] = "rea"; .say
p6eval  rakudo 1f662c: OUTPUT«No such method 'subst' for invocant of type 
'Any'␤ in block at /tmp/htGuR5us8T:1␤␤»
masak   sorear: \o
JimmyZ_ r: $_ = ""; s[ ] = "rea"; .say
p6eval  rakudo 1f662c: OUTPUT«rea␤»
JimmyZ_ r: $_ = ""; s[] = "rea"; .say
p6eval  rakudo 1f662c: OUTPUT«===SORRY!===␤Unrecognized regex metacharacter ] 
(must be quoted to match literally) at line 2, near " = \"rea\"; "␤»
JimmyZ_ std: $_ = ""; s[ ] = "rea"; .say
p6eval  std f43a358: OUTPUT«===SORRY!===␤Null pattern not allowed at 
/tmp/VK1jegzuR7 line 1:␤------> $_ = ""; s[ ⏏] = "rea"; .say␤ expecting 
quantifier␤Parse failed␤FAILED 00:00 43m␤»

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Jimmy Zhuo