Bug #15889: Enumerator#each_slice size FloatDomainError with infinite enumerator

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-freebsd12.0]
• Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN

[Freaky (Thomas Hurst)]

Calling #size on an infinite each_slice Enumerator results in a FloatDomainError exception:

1.step.size # => Infinity
1.step.each_slice(2).size # => FloatDomainError

Traceback (most recent call last):
...
        3: from (irb):3:in `size'
        2: from (irb):3:in `div'
        1: from (irb):3:in `floor'
FloatDomainError (Infinity)

Looks like enum_each_slice_size() is missing a guard conditional prior to calling div_int() with the slice size.

This was reported by Josh Cheek on Twitter: https://twitter.com/josh_cheek/status/1134123733445218304

• Status changed from Open to Closed

Applied in changeset git|17af8bfce6508951edca8650155be5525a894f65.

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Make size on an infinite each_slice enumerator return Infinity

Fixes [Bug #15889]