completion Generation failure

[hemna]

Sourcing the generated bash completion script results in error.
I have a m4 template that has a single command with no options. If I add an option argument (that I don't really need), the the generated completion script works.

The Error when sourcing the generated completion script

waboring@walt-dev2:~/tmp: $  source build/completion/run.sh
bash: build/completion/run.sh: line 17: syntax error near unexpected token `)'
bash: build/completion/run.sh: line 17: `    )'

Here are my scripts

The source run.m4

waboring@walt-dev2:~/tmp: $  cat run.m4
#!/bin/bash
#
# DEFINE_SCRIPT_DIR
# ARG_POSITIONAL_SINGLE([command],)
# ARG_TYPE_GROUP_SET([commands], [COMMAND], [command], [test,but], [index])
# ARG_USE_ENV([DEPLOYMENT_TYPE], [openstack], [The deployment type you want])
# ARG_HELP([<The general help message of my script>])
# ARGBASH_SET_INDENT([  ])
# ARGBASH_GO


# [ <-- needed because of Argbash

# printf "Value of '%s': %s\\n" 'command' "$_arg_command"
#

if [ "$_arg_quiet" = "on" ]; then
    QUIET="-q"
fi
echo "TESTS"

# ] <-- needed because of Argbash

The generated completion script

waboring@walt-dev2:~/tmp: $  cat build/completion/run.sh
#!/bin/bash

# Put this file to /etc/bash_completion.d/run.sh_ENDL_()# needed because of Argbash --> m4_ignore([
### START OF CODE GENERATED BY Argbash v2.8.0 one line above ###
# Argbash is a bash code generator used to get arguments parsing right.
# Argbash is FREE SOFTWARE, see https://argbash.io for more info

_run_sh ()
{
  local cur prev opts base
  COMPREPLY=()
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  all_long_opts="--help "
  all_short_opts="-h "
  case "$prev" in
    )
      COMPREPLY=( $(compgen -o bashdefault -o default -- "${cur}") )
      return 0
      ;;
    *)
      case "$cur" in
        --*)
          COMPREPLY=( $(compgen -W "${all_long_opts}" -- "${cur}") )
          return 0
          ;;
        -*)
          COMPREPLY=( $(compgen -W "${all_short_opts}" -- "${cur}") )
          return 0
          ;;
        *)
          COMPREPLY=( $(compgen -o bashdefault -o default -- "${cur}") )
          return 0
          ;;
      esac
  esac

}
complete -F _run_sh run.sh
### END OF CODE GENERATED BY Argbash (sortof) ### ])

If I add an optional argument, then the completion works.

waboring@walt-dev2:~/tmp: $  cat run.m4
#!/bin/bash
#
# DEFINE_SCRIPT_DIR
# ARG_POSITIONAL_SINGLE([command],)
# ARG_OPTIONAL_SINGLE([bogus], , [I don't want this optional argument], [*])
# ARG_TYPE_GROUP_SET([commands], [COMMAND], [command], [test,but], [index])
# ARG_USE_ENV([DEPLOYMENT_TYPE], [openstack], [The deployment type you want])
# ARG_HELP([<The general help message of my script>])
# ARGBASH_SET_INDENT([  ])
# ARGBASH_GO


# [ <-- needed because of Argbash

# printf "Value of '%s': %s\\n" 'command' "$_arg_command"
#

if [ "$_arg_quiet" = "on" ]; then
    QUIET="-q"
fi
echo "TEST"

# ] <-- needed because of Argbash

Here is the sourcing of the completion script:

waboring@walt-dev2:~/tmp: $  cat build/completion/run.sh
#!/bin/bash

# Put this file to /etc/bash_completion.d/run.sh_ENDL_()# needed because of Argbash --> m4_ignore([
### START OF CODE GENERATED BY Argbash v2.8.0 one line above ###
# Argbash is a bash code generator used to get arguments parsing right.
# Argbash is FREE SOFTWARE, see https://argbash.io for more info

_run_sh ()
{
  local cur prev opts base
  COMPREPLY=()
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  all_long_opts="--bogus --help "
  all_short_opts="-h "
  case "$prev" in
    --bogus)
      COMPREPLY=( $(compgen -o bashdefault -o default -- "${cur}") )
      return 0
      ;;
    *)
      case "$cur" in
        --*)
          COMPREPLY=( $(compgen -W "${all_long_opts}" -- "${cur}") )
          return 0
          ;;
        -*)
          COMPREPLY=( $(compgen -W "${all_short_opts}" -- "${cur}") )
          return 0
          ;;
        *)
          COMPREPLY=( $(compgen -o bashdefault -o default -- "${cur}") )
          return 0
          ;;
      esac
  esac

}
complete -F _run_sh run.sh
### END OF CODE GENERATED BY Argbash (sortof) ### ])
waboring@walt-dev2:~/tmp: $  source build/completion/run.sh
waboring@walt-dev2:~/tmp: $

[hemna]

This also seems to happen if the only optional argument I have is a boolean

I have a single ARG_OPTIONAL_BOOLEAN

This causes the case "$prev" in
to be empty which causes the sourcing of the completion script to fail

{
  local cur prev opts base
  COMPREPLY=()
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  all_long_opts="--quiet --help "
  all_short_opts="-q -h "
  case "$prev" in
    )
      COMPREPLY=( $(compgen -o bashdefault -o default -- "${cur}") )
      return 0
      ;;
    *)

[matejak]

This issue has been fix in an unrelated commit.
Sorry for the mess.