New session not expanding \W in bash prompt correctly

[mklein994]

Problem description

When I create a new session in Termux, the bash prompt ($PS1) doesn't expand \W as expected.

Steps to reproduce

Setup:

# ~/.bashrc
export PS1='\W$ '

Initial session:

~$ pwd && echo $PWD
/data/data/com.termux/files/home
/data/data/com.termux/files/home
~$ mkdir -p test/dir
~$ cd test/dir
dir$ pwd && echo $PWD
/data/data/com.termux/files/home/test/dir
/data/data/com.termux/files/home/test/dir
dir$ 

In a new session:

$ pwd && echo $PWD
/data/data/com.termux/files/home/test/dir
/data/data/com.termux/files/home/test/dir/
$ 

Expected behavior

Opening a new session shouldn't mangle the prompt. It seems the \W escape character isn't expecting a trailing slash in $PWD.

Additional information

termux-info:

Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://termux.org/packages/ stable main
# game-repo (sources.list.d/game.list)
deb https://dl.bintray.com/grimler/game-packages-24 games stable
# sources.list.d/pointless.list
deb https://its-pointless.github.io/files/24 termux extras
# science-repo (sources.list.d/science.list)
deb https://dl.bintray.com/grimler/science-packages-24 science stable
# unstable-repo (sources.list.d/unstable.list)
deb https://dl.bintray.com/xeffyr/unstable-packages unstable main
Updatable packages:
All packages up to date
Android version:
9
Kernel build information:
Linux localhost 4.14.83-perf+ #1 SMP PREEMPT Thu Sep 26 15:22:17 KST 2019 aarch64 Android
Device manufacturer:
LGE
Device model:
LM-G820

I can provide logcat logs if you need them.

[mklein994]

Pretty sure it stems from e28be01.

[fornwall]

@mklein994 Thanks a lot! Will be fixed by 566d656 in version 0.88, to be released shortly.