[ruby-core:121006] [Ruby master Bug#21001] unexpected nil result from proc with ensure and next
From:
"k0kubun (Takashi Kokubun) via ruby-core" <ruby-core@...>
Date:
2025-02-14 01:52:15 UTC
List:
ruby-core #121006
Issue #21001 has been updated by k0kubun (Takashi Kokubun).
Backport changed from 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: REQUIRED to 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: DONE
ruby_3_4 commit:68013d43a35a8368caa7b30c501e270333d04b35 merged revision(s) commit:31905d9e23ec6d1fa2a52f1ef2533f2056e7c9fb.
----------------------------------------
Bug #21001: unexpected nil result from proc with ensure and next
https://bugs.ruby-lang.org/issues/21001#change-111914
* Author: aharpervc (Andrew Harper)
* Status: Closed
* Assignee: prism
* ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: DONE
----------------------------------------
Hello,
I have noticed a different program behavior in Ruby 3.4 compared to previous versions. This is a simplified example for debugging that returns the expected result in Ruby 3.3 but nil in Ruby 3.4
Here is the example program:
``` ruby
puts "Ruby: #{RUBY_VERSION}"
# okay all versions
# RUN_ARRAY = [1]
# fails ruby 3.4 only
RUN_ARRAY = [1,2]
MAP_PROC = Proc.new do |&blk|
block_results = []
RUN_ARRAY.each do |value|
block_value = blk.call(value)
block_results.push block_value
end
block_results
ensure
next block_results
end
test_fn_results = MAP_PROC.call do |value|
break if value > 1
next value
end
puts test_fn_results.inspect
```
For Ruby 3.3.6 the output is:
```
Ruby: 3.3.6
[1]
```
For Ruby 3.4.1 the output is:
```
Ruby: 3.4.1
nil
```
I am expecting the Ruby 3.3 output even for Ruby 3.4. This appears to be a bug, since the program implementation is unchanged. Perhaps there is a bug in the code that is now only showing up with Ruby 3.4, but that seemed unlikely since it's working as expected in other versions.
Thank you
--
https://bugs.ruby-lang.org/
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