Issue #20213 has been reported by jeremyevans0 (Jeremy Evans). ---------------------------------------- Bug #20213: zsuper with keyword splat without explicit keywords incorrectly uses mutable keyword splat https://bugs.ruby-lang.org/issues/20213 * Author: jeremyevans0 (Jeremy Evans) * Status: Open * Priority: Normal * Backport: 3.0: DONTNEED, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED ---------------------------------------- As the subject states, the super call in this code is compiled incorrectly: ```ruby extend(Module.new{def a(**k) k[:a] = 1 end}) extend(Module.new{def a(**k) p k; super; p k end}) a # Expected output, actual output on Ruby 2.0-3.2: {} {} # Actual output on Ruby 3.3 and master {} {:a=>1} ``` The zsuper call here uses VM_CALL_KW_SPLAT_MUT: ``` invokesuper <calldata!argc:1, FCALL|SUPER|ZSUPER|KW_SPLAT|KW_SPLAT_MUT>, nil ``` That is not correct, because as the example shows, if the super method accepts a keyword splat, the super method can modify the keyword splat, and changes are reflected in the caller. I submitted a pull request to fix this: https://github.com/ruby/ruby/pull/9710, and marked this for backporting to 3.3. -- https://bugs.ruby-lang.org/