15:19 <razetime> Hi. I'm trying to modify the TruffleRuby parser for supporting pattern matching, and I came across this production in the Jruby parser: https://github.com/jruby/jruby/blob/de758703dfe2054525aa4f948a5913e70e0c9b25/core/src/main/java/org/jruby/parser/ParserSupport.java#L1822

15:19 <razetime> what is the purpose of the push_pvtbl, pktbl calls here?

15:22 <razetime> sorry, this file: https://github.com/jruby/jruby/blob/f3acf245effecafd39d923e1afb1d0fcda1e9b3e/core/src/main/java/org/jruby/parser/RubyParser.y#L2333