gistfile1.txt

timo@schmetterling /tmp [1]> perl6 heredoc_mistake.txt 
===SORRY!===
Variable '$bar' is not declared
at /tmp/heredoc_mistake.txt:7
------>     sub test(⏏$bar) { }
Other potential difficulties:
    Ignored the heredoc delimiter 'EOF' earlier, because there was some garbage before the end-of-line: ';'.
    at /tmp/heredoc_mistake.txt:5
    ------> <BOL>⏏    EOF;

timo@schmetterling /tmp [1]> cat heredoc_mistake.txt 
say qq:to/EOF/;
    Hey
    how
    are you?
    EOF;

    sub test($bar) { }