Bug: Acme: Edit breaks input text unpredictably

[spektrokalter]

Steps to reproduce the problem

Open an empty window and put the following text into its body:

lee, bruce
chan, jackie
li, jet
yen, donnie
yeoh, michelle

Put either of the following two commands into the window's tag and run it:

Edit , x/[a-z]*/ g/./ -#0+/./ |tr a-z A-Z
Edit , x/[a-z]+/ -#0+/./ |tr a-z A-Z

Their expected purpose is to capitalize the first character of each word.

Sometimes it works as expected, sometimes the first character is lost. Run the command multiple times to see if it breaks.

When it breaks, Acme does not print "warning: changes out of sequence".

Both commands always work as expected in Sam.

plan9port version

a2567fc

OS version

macOS 14.5 (23F79)