Fixed crash in 'text see' - Bug [e0f1c380bd]

1 files changed, 23 insertions, 20 deletions

diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index 49a35f5..f718e2a 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -5546,32 +5546,35 @@ TkTextSeeCmd(
 
     /*
      * Call a chunk-specific function to find the horizontal range of the
-     * character within the chunk.
+     * character within the chunk. chunkPtr is NULL if trying to see in elided
+     * region.
      */
 
-    (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteCount,
-            dlPtr->y + dlPtr->spaceAbove,
-            dlPtr->height - dlPtr->spaceAbove - dlPtr->spaceBelow,
-            dlPtr->baseline - dlPtr->spaceAbove, &x, &y, &width,
-            &height);
-    delta = x - dInfoPtr->curXPixelOffset;
-    oneThird = lineWidth/3;
-    if (delta < 0) {
-        if (delta < -oneThird) {
-            dInfoPtr->newXPixelOffset = (x - lineWidth/2);
-        } else {
-            dInfoPtr->newXPixelOffset -= ((-delta) );
-        }
-    } else {
-        delta -= (lineWidth - width);
-        if (delta > 0) {
-            if (delta > oneThird) {
+    if (chunkPtr != NULL) {
+        (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteCount,
+                dlPtr->y + dlPtr->spaceAbove,
+                dlPtr->height - dlPtr->spaceAbove - dlPtr->spaceBelow,
+                dlPtr->baseline - dlPtr->spaceAbove, &x, &y, &width,
+                &height);
+        delta = x - dInfoPtr->curXPixelOffset;
+        oneThird = lineWidth/3;
+        if (delta < 0) {
+            if (delta < -oneThird) {
                 dInfoPtr->newXPixelOffset = (x - lineWidth/2);
             } else {
-                dInfoPtr->newXPixelOffset += (delta );
+                dInfoPtr->newXPixelOffset -= ((-delta) );
             }
         } else {
-            return TCL_OK;
+            delta -= (lineWidth - width);
+            if (delta > 0) {
+                if (delta > oneThird) {
+                    dInfoPtr->newXPixelOffset = (x - lineWidth/2);
+                } else {
+                    dInfoPtr->newXPixelOffset += (delta );
+                }
+            } else {
+                return TCL_OK;
+            }
         }
     }
     dInfoPtr->flags |= DINFO_OUT_OF_DATE;