Bash 5.1 and Readline 8.1 released
Bash 5.1 is out. "This release fixes several outstanding bugs in bash-5.0 and introduces several new features. The most significant change is a return to the bash-4.4 behavior of not performing pathname expansion on a word that contains backslashes but does not contain any unquoted globbing special characters. This comes after a long POSIX discussion that resulted in a change to the standard. There are several changes regarding trap handling while reading from the terminal (e.g, for `read' and `select'.) There are a number of bug fixes, including several bugs that caused the shell to crash."

The readline library used in bash 5.1 has also been updated to version 8.1. "There are more improvements in the programming interface and new user-visible variables and bindable commands. There are a several new public API functions, but there should be no incompatible changes to existing APIs."