Issue #21540 has been updated by Earlopain (Earlopain _). I got a PR https://github.com/ruby/prism/pull/3630 that aims to fix this. ---------------------------------------- Bug #21540: prism allows `foo && return bar` when parse.y doesn't https://bugs.ruby-lang.org/issues/21540#change-114452 * Author: Earlopain (Earlopain _) * Status: Assigned * Assignee: prism * ruby -v: ruby 3.5.0dev (2025-08-08T02:57:23Z master 3ad26d0501) [x86_64-linux] * Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED ---------------------------------------- Code such as `foo && return bar` has been disallowed in ruby since at least Ruby 2.0. Prism allows it though: ``` $ ruby -cve "a && return foo" ruby 3.5.0dev (2025-08-08T02:57:23Z master 3ad26d0501) +PRISM [x86_64-linux] Syntax OK $ ruby --parser=parse.y -cve "a && return foo" ruby 3.5.0dev (2025-08-08T02:57:23Z master 3ad26d0501) [x86_64-linux] -e:1: syntax error, unexpected local variable or method, expecting end-of-input a && return foo ruby: compile error (SyntaxError) ``` The code seems to behave like I'd expect it to and I wouldn't mind it being accepted but it is inconsistent. Also happens on Ruby 3.4 -- https://bugs.ruby-lang.org/