Bug #22004: parse.y doesn't executes loop body with `while true || true` condition

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 4.1.0dev (2026-04-15T13:47:25Z master d077df24a2) +PRISM [x86_64-linux]
• Backport: 3.3: WONTFIX, 3.4: DONE, 4.0: DONE

[Earlopain (Earlopain _)]

while true || true
  puts 1
end

This should never exit but with parse.y, the body is never executed. It seems to happen when one of the conditions is a truthy literal. Something similar happens with unitl:

until false && true
  puts 1
end

By moving the literals out to methods that just return them, it behaves like I would expect. Seems to have started happening in Ruby 3.3.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|7f4f3c8ee7cde795dc27be753796fc7ea8318565.

---

[Bug #22004] Fix short-circuited loop conditions

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 3.3: WONTFIX, 3.4: REQUIRED, 4.0: REQUIRED to 3.3: WONTFIX, 3.4: DONE, 4.0: REQUIRED

Backported into ruby_3_4 at fdac94eee1a3f226cafcfa6ec0da97bb08b03369

[k0kubun (Takashi Kokubun)]

• Backport changed from 3.3: WONTFIX, 3.4: DONE, 4.0: REQUIRED to 3.3: WONTFIX, 3.4: DONE, 4.0: DONE

ruby_4_0 b18acb27c3f1b1ae26bbae6e53e94e246dc0e973 merged revision(s) 7f4f3c8ee7cde795dc27be753796fc7ea8318565.