tr-test.sh fails on Ubuntu 24.04

[BolunThompson]

Minimal reproduction:

#!/bin/bash

FILE=$(mktemp)
printf %s 1 > $FILE

cat $FILE
cat $FILE | tr 1 2
cat $FILE
echo # formatting

Bash output: 121
Pash output: 112

Related to #736.

Separately, @angelhof thoughts on adding Ubuntu 24.04 (or ubuntu-latest) to CI? There have been a few bugs (#726, #736) that only affect the newer version, and 20.04 is being depreciated in May.

[BolunThompson]

I’ll assign this to myself unless someone else wants to look at this.

[BolunThompson]

Bizarrely, the script works as intended when invoked as a command substitution. Example:

./pa.sh test.sh # prints 112
(./pa.sh tr-test.sh) # prints 112
echo $(./pa.sh test.sh) # prints 121

Tested with both dash and bash. Does pash do something differently in the last case?

[angelhof]

Bizarrely, the script works as intended when invoked as a command substitution. Example:

./pa.sh test.sh # prints 112
(./pa.sh tr-test.sh) # prints 112
echo $(./pa.sh test.sh) # prints 121

Tested with both dash and bash. Does pash do something differently in the last case?

This is really weird, I don't think anything changes when that happens. Does anything look different when using -d 1? What do outputs look like?

Separately, @angelhof thoughts on adding Ubuntu 24.04 (or ubuntu-latest) to CI? There have been a few bugs (#726, #736) that only affect the newer version, and 20.04 is being depreciated in May.

I think that is a great idea! Could you make a PR?