Bug #20421: String#index and String#byteindex don't clear `$~` when offset > size (or bytesize)

• Status: Open
• Assignee: -
• Target version: -
• ruby -v: 3.2.2
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

[andrykonchin (Andrew Konchin)]

When String#index and String#byteindex are called with Regexp and offset they clear $~ (that contains result of the last Regexp matching) when offset < -size. But they don't clear $~ when offset > size what seems inconsistent:

"a".index(/a/)
p $~ # => #<MatchData "a">

string = "blablabla"
string.index(/bla/, string.length + 1)
p $~ # => #<MatchData "a">

[andrykonchin (Andrew Konchin)]

• Description updated (diff)