Fix crash when deleting inset with backspace

See description here:
https://marc.info/?l=lyx-devel&m=171243435229412&w=2

cutSelectionHelper did not request a metrics update when the selection
was inner to a paragraph. The new code is better, but it was not
necessary before the biginset branch because of a full metrics
computation that hid this missing case.

diff --git a/src/CutAndPaste.cpp b/src/CutAndPaste.cpp
index 276285dfbc2dbcf3db0d10f59e991ffe23a2eb4e..abed1567d7fa289520784322cba948e8f0367b88 100644 (file)
--- a/src/CutAndPaste.cpp
+++ b/src/CutAndPaste.cpp
@@ -989,6 +989,8 @@ void cutSelectionHelper(Cursor & cur, CutStack & cuts, bool realcut, bool putcli
 
                if (begpit != endpit)
                        cur.screenUpdateFlags(Update::Force | Update::FitCursor);
+               else
+                       cur.screenUpdateFlags(Update::SinglePar | Update::FitCursor);
 
                tie(endpit, endpos) =
                        eraseSelectionHelper(bp, text->paragraphs(), begpit, endpit,