[atnak]

Description:
A severe bug when using Undo can result in text that does not match any previous state. Attempting to Redo can further break the text.

Sighted Versions: EmEditor (Professional) 10.?.?, 11.0.0

Steps to reproduce:
1. Put this following text into a file.

if (foo(apple,

	         BACKSPACE_OVER_THIS) {

	}

2. Name the file “xxx.c” (so that the “C++” configuration will be selected) and reopen the file.

3. Place the cursor behind “_THIS” and press the Backspace key a few times.

4. Use Ctrl-Z to undo.

5. The resulting text may look like below.

if (foo(apple,

	BACKSPACE_OV) {ER_THIS

	}

[Yutaka Emura]

Hello atnak,

I reproduce the issue, and will fix it in future versions.

Thank you!

[Author]

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