Issue #20883 has been updated by jhawthorn (John Hawthorn). I opened two backport PRs. I marked 3.2 and 3.3 as REQUIRED for backport, but the bug is fairly mild if the branch maintainers would rather skip it. 3.2: https://github.com/ruby/ruby/pull/12041 3.3: https://github.com/ruby/ruby/pull/12040 ---------------------------------------- Bug #20883: sprintf with binary strings has incorrect coderange https://bugs.ruby-lang.org/issues/20883#change-110547 * Author: jhawthorn (John Hawthorn) * Status: Closed * ruby -v: ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [x86_64-linux] * Backport: 3.1: DONTNEED, 3.2: REQUIRED, 3.3: REQUIRED ---------------------------------------- In [9dc6065](https://github.com/ruby/ruby/commit/9dc60653db186b1ae9400ed75b413a07728ce6ff) we stopped updating the coderange when the encoding became ENCINDEX_ASCII_8BIT. Though ASCII-8BIT (binary) can't ever have a broken coderange, it does need to distinguish between 7bit and valid. ``` ruby puts ("%s" % "\xe2".b).ascii_only? # => false from Ruby 2.1 to 3.1 # => true (incorrect) on Ruby 3.2 and 3.3 # => false again on HEAD ``` This was fixed in master as part of #20189, which clears the coderange in more cases of `rb_str_resize` which happens to fix this, but we shouldn't rely on it. https://github.com/ruby/ruby/pull/12029 -- https://bugs.ruby-lang.org/