Yet Another Shell

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Yet another shell, version 2.41.

This version includes many bug fixes with some new features.

Yash 2.41

• + '--emptylastfield' option.
• + New option for the "shift" built-in: -A
• + The "shift" built-in now accepts negative counts.
• + New completion script for: git-notes, git-reflog, git-worktree
• = The non-interactive shell now exits on an assignment error in a simple command without a command name.
• = The exit status is now non-zero when a for loop has been interrupted because of an read-only variable.
• = When there is no positional parameter, the word """$@" is now expanded to an empty word, producing the same result as "$@""".
• = The behavior of field splitting has been modified to match the intended interpretation of POSIX: If field splitting yields more than one field and the last field is empty, the last field is now removed.
• = The "read" built-in now removes leading whitespaces when assigning the last input value to the variable.
• = The first character of $IFS is now always used as a separator when concatenating positional parameters. Previously, $IFS was ignored in some corner cases.
• * Unclosed process redirections are now detected as syntax error.
• * When $ECHO_STYLE was GNU or ZSH, the "echo" built-in was incorrectly ignoring single hyphen operands.
• * The "typeset" built-in was crashing when used with a temporary assignment to a variable not specified in the built-in operands.
• * In the "typeset" built-in, the -r option was not effective when printing functions.
• * The "typeset" built-in now detects combination of the -f and -g options as an error.
• * The "fg" and "bg" built-ins no longer try to resume a non-job- controlled job when given no operand.
• * In range brace expansion, integers were not always parsed correctly.
• * The "fc" built-in was not handling the history range correctly when the range was specified with an unused entry number.
• * The "fc" built-in was incorrectly rejecting the syntax of the form "fc -s foo=bar n".
• * The interactive shell was unexpectedly forgetting the exit status of background jobs when reporting the job status.
• * Fixed potential undefined behavior during reading a history file.
• * Parameter expansions of the form ${foo/bar/baz} are now rejected in the POSIXly-correct mode, as documented in the manual.
• * Single- or double-quoted empty words were incorrectly being removed in field splitting.
• * Backslash escapes are now recognized in parameter indexes.

Legend:

• +: new feature
• =: specification change
• *: bug fix