# result:
#
# error[E101]: invalid regular expression
#   ┌─ :2:1
#   │
# 2 │ r'['
#   │ ^^^^ regex parse error: unclosed character class: [
#   │
#   = see documentation about regular expressions at https://vrl.dev/expressions/#regular-expression
#   = learn more about error code 101 at https://errors.vrl.dev/101
#   = see language documentation at https://vrl.dev
#   = try your code in the VRL REPL, learn more at https://vrl.dev/examples

r'['
