Summary

In certain circumstances, saving a buffer incorrectly prevents redo after save.

1. In terminal

mkdir /tmp/issue31917
cd $_
echo 'foo' > foo.txt
zed . foo.txt:1:1

2. enter, cms-s, cmd-z, cmd-s, cmd-shift-z

Expected Behavior: Redo (cmd-shift-z) should restore the newline

Actual Behavior: Redo action does nothing

In other circumstances the redo buffer is correctly preserved (as expected). See comment below for one such case where Zed handles it correctly.

For cases when the buffer changes during format_on_save, see this feature request:

• Support redo after autoformat changes buffer #31984

Settings

Reproducible with empty settings {}
No formatter.

Zed Version and System Specs

Zed: v0.188.5 (Zed)
OS: macOS 15.5.0
Memory: 16 GiB
Architecture: aarch64