Bug #19769: Range of size 1 in String#tr causes unexpected behavior

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

[alexandre (alexandre borderes)]

Hi,

I noticed a possible unexpected behavior in String#tr.
Is that intentional?

'ABC'.tr 'A-AB', 'XY'   # => "YYC"

I would expect the same result as:

'ABC'.tr 'AB', 'XY'     # => "XYC"

The tr utility does exactly that:

echo ABC | tr A-AB XY   # => "XYC"

The letter 'A' is interpreted 2 times in that case, shifting by 1 all the replacement string.

(I found this related https://bugs.ruby-lang.org/issues/1953)

[alexandre (alexandre borderes)]

• Description updated (diff)

I created a PR https://github.com/ruby/ruby/pull/8080

• Status changed from Open to Closed

Applied in changeset git|e5825de7c9f07e4f7bd2b83ce8973e19a4652916.

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[Bug #19769] Fix range of size 1 in String#tr