Sketch content is lost on save

[johonline1]

Describe the problem

When the project compilation process starts, the changes to the text should ideally be saved to the hard drive beforehand.

This doesn't always happen reliably.

The last change is frequently omitted. A save command has no effect in this case. Even a small change (additional spaces) doesn't result in a correct save. Only deleting and re-entering the entire line resolves the issue.

More frequently, the last characters of a file are truncated, or non-printable characters are appended to the end.

One of these issues occurs more than once a day.

To reproduce

<Instructions to reproduce not provided by reporter ☹️>

Expected behavior

The file content in the Arduino IDE and on the hard drive should be identical.

Arduino IDE version

2.3.6 but also 2.3.3

Operating system

Windows

Operating system version

10

Additional context

Possible relevant factors:

• Depending on the task, I split the sketch into multiple files, sometimes up to 10.
• The files are synchronized using the Synology Drive client.

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details

[per1234]

Thanks for your report @johonline1.

When the project compilation process starts, the changes to the text should ideally be saved to the hard drive beforehand.

This doesn't always happen reliably.

I'm not sure I understand what you mean by this. Although the auto save system of Arduino IDE 1.x did indeed only trigger on compilation, that is not how Arduino IDE 2.x works.

Arduino IDE's saving behavior works like this:

• If you have the "Auto save" preference enabled, the sketch is saved once per 1000 ms (as controlled by the files.autoSaveDelay advanced setting).
• If you do not have the "Auto save" preference enabled, the sketch is only saved when the user triggers a save operation (either via the keyboard shortcut, File > Save, or the dialogs that appear on exit)

Please add a comment on this issue thread that provides the following information:

• The state of your "Auto save" preference (you can access your preferences via File > Preferences in the Arduino IDE menus.
• A detailed description of what exactly it is that leads you to believe there is a correlation between the loss of sketch content and compilation.

The files are synchronized using the Synology Drive client.

Does the fault still occur if you save the sketch to a location that is not synced using the Synology Drive client?

Depending on the task, I split the sketch into multiple files, sometimes up to 10.

Does the fault still occur if you save a sketch that only consists of a single file?

[johonline1]

Synology Cloud Drive is now disabled for this folder.

During compilation, I ensured that the automatic filesaving process was complete. (See indicator point.)

The memory errors have not occurred again so far.