Yet Another Shell

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Yet another shell, version 2.40.

This version includes many bug fixes.

Yash 2.40

• = The "unset" built-in no longer rejects variable names containing the "=" symbol as an error. They are now silently ignored.
• = In the POSIXly-correct mode, unclosed here-documents are now treated as an error.
• * Fixed possible arithmetic overflow errors in memory allocation which might result in an undefined behavior.
• * Fixed crash on assigning a floating-point number in arithmetic expansion.
• * Fixed memory leak on finding a command in a relative path from $PATH.
• * The parameter expansion ${foo##bar*} was being treated like ${foo##bar} where the asterisk should match up to the end of the parameter value.
• * The parameter expansion ${foo%%*} was being expanded to ${foo} where it should expand to an empty string.
• * The "getopts" built-in no longer rejects digits as option characters.
• * The non-interactive shell no longer exits when the "command" built-in executes the "." built-in and the script is not found.
• * Fixed incorrect exit status of simple commands where command substitution is performed during command word expansion which yields no command line words.
• * The "exec" built-in now correctly exits with an exit status of 127 for a script file not found.
• * Pipes were not being connected as expected during command word expansion.
• * The "fg" and "bg" built-ins now report an error when they fail to print the job name.

Legend:

• =: specification change
• *: bug fix