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-rw-r--r--doc/ScintillaHistory.html4
-rw-r--r--src/Document.cxx5
2 files changed, 8 insertions, 1 deletions
diff --git a/doc/ScintillaHistory.html b/doc/ScintillaHistory.html
index 25ca454cf..12b233b4f 100644
--- a/doc/ScintillaHistory.html
+++ b/doc/ScintillaHistory.html
@@ -607,6 +607,10 @@
<a href="https://sourceforge.net/p/scintilla/bugs/2488/">Bug #2488</a>.
</li>
<li>
+ Fix lexing after undo at end of document.
+ <a href="https://sourceforge.net/p/scintilla/bugs/2491/">Bug #2491</a>.
+ </li>
+ <li>
On Qt, add const to ScintillaDocument and ScintillaEdit methods.
<a href="https://sourceforge.net/p/scintilla/bugs/2494/">Bug #2494</a>.
</li>
diff --git a/src/Document.cxx b/src/Document.cxx
index 064b336e3..e4db66a19 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -1590,7 +1590,10 @@ Sci::Position Document::Undo() {
}
cb.PerformUndoStep();
if (action.at != ActionType::container) {
- ModifiedAt(action.position);
+ if ((action.at == ActionType::insert) && (action.position >= LengthNoExcept()) && (action.position > 0))
+ ModifiedAt(action.position - 1);
+ else
+ ModifiedAt(action.position);
newPos = action.position;
}