I feel like the type of work that's done by browsers on JIT compiling Javascript would be really hard if you can't 100% reliably parse the language. That's irr

I feel like the type of work that's done by browsers on JIT compiling Javascript would be really hard if you can't 100% reliably parse the language. That's irrelevant in this case, because a hypothetical Perl 5 JIT wouldn't do much until the Perl 5 parser finished parsing its code. Remember, all this proof proves is that you cannot produce a single, unambiguous parse tree from every Perl 5 source file because of the syntactic construct that lets you change how the parser works for specific symbols.