Issue #20222 has been updated by kddnewton (Kevin Newton). Status changed from Open to Closed Thank you! This helps explain it. ---------------------------------------- Misc #20222: Dedup-ing clarification https://bugs.ruby-lang.org/issues/20222#change-106663 * Author: kddnewton (Kevin Newton) * Status: Closed * Priority: Normal ---------------------------------------- ``` ruby source = %q{"foo".freeze.equal?("foo".freeze)} RubyVM::InstructionSequence.compile(source).eval # => true RubyVM::InstructionSequence.compile_option = false RubyVM::InstructionSequence.compile(source).eval # => false ``` `"foo".freeze` uses `opt_str_freeze` when optimizations are turned on, which also deduplicates. This means this code has different behavior depending on if optimizations are turned on or off. To be clear, I'm not saying whether or not this is a problem. I'm asking if this is desired behavior? -- https://bugs.ruby-lang.org/