mlr: cannot parse DSL expression.
Parse error on token "x" at line 20 columnn 5.
Please check for missing semicolon.
Expected one of:
  ; { } = > >> | ( ||= ^^= &&= ??= ???= |= &= ^= <<= >>= >>>= += .= -= *=
  /= //= %= **= ? || ^^ && ?? ??? =~ !=~ == != <=> >= < <= ^ & << >>> + -
  .+ .- * / // % .* ./ .// . ** [ [[ [[[

