(try_window_id): Avoid aborting if PT is inside a

partially visible line.

2 files changed, 15 insertions, 2 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 94742480e9b..5d6838ae845 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2003-05-27  Andreas Schwab  <schwab@suse.de>
+
+        * xdisp.c (try_window_id): Avoid aborting if PT is inside a
+        partially visible line.
+
+        * alloc.c (Fgarbage_collect): Fix last change.
+
 2003-05-26  John Paul Wallington  <jpw@gnu.org>
 
         * xfns.c (Fx_create_frame): Don't call Qface_set_after_frame_default.
diff --git a/src/xdisp.c b/src/xdisp.c
index d78c25c5ba9..038d0694bca 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -12881,7 +12881,10 @@ try_window_id (w)
          the window end again, since its offset from Z hasn't changed.  */
       r0 = MATRIX_FIRST_TEXT_ROW (current_matrix);
       if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta
-          && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes)
+          && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes
+          /* PT must not be in a partially visible line.  */
+          && !(PT >= MATRIX_ROW_START_CHARPOS (row) + delta
+               && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w)))
         {
           /* Adjust positions in the glyph matrix.  */
           if (delta || delta_bytes)
@@ -12926,7 +12929,10 @@ try_window_id (w)
          as is, without changing glyph positions since no text has
          been added/removed in front of the window end.  */
       r0 = MATRIX_FIRST_TEXT_ROW (current_matrix);
-      if (TEXT_POS_EQUAL_P (start, r0->start.pos))
+      if (TEXT_POS_EQUAL_P (start, r0->start.pos)
+          /* PT must not be in a partially visible line.  */
+          && !(PT >= MATRIX_ROW_START_CHARPOS (row)
+               && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w)))
         {
           /* We have to compute the window end anew since text
              can have been added/removed after it.  */