Error when parsing variable that has a default value that contains 2 or more unquoted pipes

[nickjj]

This is an interesting one. Neither ShellCheck or shfmt suggest using quotes inside this default value but using quotes is the only way to prevent TS from throwing an error.

I'm using the latest Treesitter inside of Neovim v0.11.0.

This works with 1 pipe and no quotes but still throws a TS error

#!/usr/bin/env bash

HELLO="${HELLO:-YES|NO}"

echo "cool"

(program ; [0, 0] - [5, 0]
  (comment) ; [0, 0] - [0, 19]
  (variable_assignment ; [2, 0] - [2, 24]
    name: (variable_name) ; [2, 0] - [2, 5]
    value: (string ; [2, 6] - [2, 24]
      (expansion ; [2, 7] - [2, 23]
        (variable_name) ; [2, 9] - [2, 14]
        (ERROR ; [2, 16] - [2, 20]
          (word)) ; [2, 16] - [2, 19]
        (word)))) ; [2, 20] - [2, 22]
  (command ; [4, 0] - [4, 11]
    name: (command_name ; [4, 0] - [4, 4]
      (word)) ; [4, 0] - [4, 4]
    argument: (string ; [4, 5] - [4, 11]
      (string_content)))) ; [4, 6] - [4, 10]

This fails with 2 or more pipes and no quotes but breaks syntax highlighting

#!/usr/bin/env bash

HELLO="${HELLO:-YES|NO|MAYBE}"

echo "cool"

(program ; [0, 0] - [5, 0]
  (comment) ; [0, 0] - [0, 19]
  (ERROR ; [2, 0] - [4, 11]
    (variable_name) ; [2, 0] - [2, 5]
    (variable_name) ; [2, 9] - [2, 14]
    (ERROR ; [2, 16] - [2, 30]
      (word) ; [2, 16] - [2, 19]
      (word)) ; [2, 20] - [2, 28]
    (word) ; [4, 0] - [4, 4]
    (string ; [4, 5] - [4, 11]
      (string_content)))) ; [4, 6] - [4, 10]

This works with 2 or more pipes with quotes and has no errors

#!/usr/bin/env bash

HELLO="${HELLO:-"YES|NO|MAYBE"}"

echo "cool"

(program ; [0, 0] - [5, 0]
  (comment) ; [0, 0] - [0, 19]
  (variable_assignment ; [2, 0] - [2, 32]
    name: (variable_name) ; [2, 0] - [2, 5]
    value: (string ; [2, 6] - [2, 32]
      (expansion ; [2, 7] - [2, 31]
        (variable_name) ; [2, 9] - [2, 14]
        (string ; [2, 16] - [2, 30]
          (string_content))))) ; [2, 17] - [2, 29]
  (command ; [4, 0] - [4, 11]
    name: (command_name ; [4, 0] - [4, 4]
      (word)) ; [4, 0] - [4, 4]
    argument: (string ; [4, 5] - [4, 11]
      (string_content)))) ; [4, 6] - [4, 10]