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

• Status: Open
• 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: REQUIRED, 4.0: REQUIRED

[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.