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-rw-r--r--generic/tkTextDisp.c9
-rw-r--r--tests/textDisp.test24
2 files changed, 32 insertions, 1 deletions
diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index eb479b2..a57c24b 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -4805,9 +4805,16 @@ TextRedrawTag(
/*
* Round up the starting position if it's before the first line visible on
- * the screen (we only care about what's on the screen).
+ * the screen (we only care about what's on the screen). Beware that the
+ * display info structure might need update, for instance if we arrived
+ * here from an 'after idle' script removing tags in a range whose
+ * display lines (and dInfo) were partially invalidated by a previous
+ * delete operation in the text widget.
*/
+ if (dInfoPtr->flags & DINFO_OUT_OF_DATE) {
+ UpdateDisplayInfo(textPtr);
+ }
dlPtr = dInfoPtr->dLinePtr;
if (dlPtr == NULL) {
return;
diff --git a/tests/textDisp.test b/tests/textDisp.test
index 7aa2fef..ac3aee0 100644
--- a/tests/textDisp.test
+++ b/tests/textDisp.test
@@ -1333,6 +1333,30 @@ test textDisp-9.13 {TkTextRedrawTag} {
update
list $tk_textRelayout $tk_textRedraw
} {{2.0 6.0 7.0} {2.0 6.0 7.0}}
+test textDisp-9.14 {TkTextRedrawTag} {
+ pack [text .tnocrash]
+ for {set i 1} {$i < 6} {incr i} {
+ .tnocrash insert end \nfoo$i
+ }
+ .tnocrash tag configure mytag1 -relief raised
+ .tnocrash tag configure mytag2 -relief solid
+ update
+ proc doit {} {
+ .tnocrash tag add mytag1 4.0 5.0
+ .tnocrash tag add mytag2 4.0 5.0
+ after idle {
+ .tnocrash tag remove mytag1 1.0 end
+ .tnocrash tag remove mytag2 1.0 end
+ }
+ .tnocrash delete 1.0 2.0
+ }
+ doit ; # must not crash
+ after 500 {
+ destroy .tnocrash
+ set done 1
+ }
+ vwait done
+} {}
test textDisp-10.1 {TkTextRelayoutWindow} {
.t configure -wrap char