[Bug 3588824]: bug in image index handling for weird image names

3 files changed, 21 insertions, 3 deletions

diff --git a/generic/tkTextImage.c b/generic/tkTextImage.c
index 771347d..bc2b7c4 100644
--- a/generic/tkTextImage.c
+++ b/generic/tkTextImage.c
@@ -779,6 +779,10 @@ TkTextImageIndex(
     Tcl_HashEntry *hPtr;
     TkTextSegment *eiPtr;
 
+    if (textPtr == NULL) {
+	return 0;
+    }
+
     hPtr = Tcl_FindHashEntry(&textPtr->sharedTextPtr->imageTable, name);
     if (hPtr == NULL) {
 	return 0;
diff --git a/generic/tkTextIndex.c b/generic/tkTextIndex.c
index a9b0bed..70c94db 100644
--- a/generic/tkTextIndex.c
+++ b/generic/tkTextIndex.c
@@ -758,9 +758,11 @@ GetIndex(
 
     /*
      *---------------------------------------------------------------------
-     * Stage 1: check to see if the index consists of nothing but a mark name.
-     * We do this check now even though it's also done later, in order to
-     * allow mark names that include funny characters such as spaces or "+1c".
+     * Stage 1: check to see if the index consists of nothing but a mark
+     * name, an embedded window or an embedded image.  We do this check
+     * now even though it's also done later, in order to allow mark names,
+     * embedded window names or image names that include funny characters
+     * such as spaces or "+1c".
      *---------------------------------------------------------------------
      */
 
@@ -768,6 +770,14 @@ GetIndex(
 	goto done;
     }
 
+    if (TkTextWindowIndex(textPtr, string, indexPtr) != 0) {
+	return TCL_OK;
+    }
+
+    if (TkTextImageIndex(textPtr, string, indexPtr) != 0) {
+	return TCL_OK;
+    }
+
     /*
      *------------------------------------------------
      * Stage 2: start again by parsing the base index.
diff --git a/generic/tkTextWind.c b/generic/tkTextWind.c
index ecafd4e..5dc8feb 100644
--- a/generic/tkTextWind.c
+++ b/generic/tkTextWind.c
@@ -1329,6 +1329,10 @@ TkTextWindowIndex(
     Tcl_HashEntry *hPtr;
     TkTextSegment *ewPtr;
 
+    if (textPtr == NULL) {
+	return 0;
+    }
+
     hPtr = Tcl_FindHashEntry(&textPtr->sharedTextPtr->windowTable, name);
     if (hPtr == NULL) {
 	return 0;