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Bug #20094

closed

Inline while loop behavior changed unexpectedly in 3.3.0

Added by sisyphus_cg (Sisyphus CG) 10 months ago. Updated 5 months ago.

Status:
Closed
Assignee:
-
Target version:
-
[ruby-core:115923]

Description

The behavior of the inline while loop has changed in 3.3.0. This unexpectedly broke my code and I couldn't find anything in the changelog about it so reporting it as a bug.

In ruby <= 3.2:

(p 1) while false      # nothing
(p 1; p 2) while false # nothing

In ruby 3.3:

(p 1) while false      # 1
(p 1; p 2) while false # 1 2

Essentially, if the left hand side looks like a statement, now it is treated as a do-while loop. In ruby 3.2 and less this only happened with explicit use of begin and end.

Updated by jeremyevans0 (Jeremy Evans) 10 months ago

  • Status changed from Open to Closed
Actions #3

Updated by jeremyevans0 (Jeremy Evans) 10 months ago

  • Backport changed from 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN to 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED

Updated by naruse (Yui NARUSE) 9 months ago

  • Backport changed from 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED to 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE

ruby_3_3 119d447d42d4645ac919ee53f3ec294deaa7c59b merged revision(s) bc002971b6ad483dbf69b8a275c44412bb6ab954.

Updated by rbjl (Jan Lelis) 6 months ago ยท Edited

It seems like the bug is still present in Ruby 3.3.1:

(p 1) while false # 1

Updated by Eregon (Benoit Daloze) 6 months ago

Indeed:

$ ruby -ve '(p 1) while false'
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
$ ruby -ve '(p 1) while false'
ruby 3.3.1 (2024-04-23 revision c56cd86388) [x86_64-linux]
1

Updated by nevans (Nicholas Evans) 6 months ago

Can we reopen this bug (please), or should we create a new issue?

Updated by nagachika (Tomoyuki Chikanaga) 6 months ago

  • ruby -v changed from 3.3.0 to 3.3.1
  • Backport changed from 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE to 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED

I see the issue was fixed on master branch.
I will revert back Backport field to "3.3: REQUIRED", but stay the ticket status "Closed.

Updated by k0kubun (Takashi Kokubun) 5 months ago

  • Backport changed from 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED to 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE

Updated by k0kubun (Takashi Kokubun) 5 months ago

It was previously reverted presumably because the cherry-pick of bc002971b6ad483dbf69b8a275c44412bb6ab954 to ruby_3_3 doesn't really work. I had to manually create a whole backport patch without relying on git for that reason. I encourage people to file a backport pull request to ruby_3_3 (and make the CI green, which was the hard thing for this ticket) if you want to see a change backported to stable branches.

Updated by k0kubun (Takashi Kokubun) 5 months ago

It seems like the bug is still present in Ruby 3.3.1

Ruby 3.3.2 has been released today. It shouldn't have this issue.

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