Fix bug #9284 with line/wrap-prefix property on display strings.

 src/xdisp.c (iterate_out_of_display_property): xassert that
 IT->position is set to within IT->object's boundaries.  Break from
 the loop as soon as EOB is reached; avoids infloops in redisplay
 when IT->position is set up wrongly due to some bug.  Set
 IT->current to match the bidi iterator unconditionally.
 (push_display_prop): Allow GET_FROM_STRING as IT->method on
 entry; avoids crashes when line/wrap-prefix is set on a display
 string.  Force push_it to save on the stack the current
 buffer/string position, to be restored by pop_it.  Fix flags in
 the iterator structure wrt the object coming from a display
 property, as `line-prefix' and `wrap-prefix' are not ``replacing''
 properties.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index af9586037d7..5c65159a841 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,17 @@
+2011-08-12  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (iterate_out_of_display_property): xassert that
+        IT->position is set to within IT->object's boundaries.  Break from
+        the loop as soon as EOB is reached; avoids infloops in redisplay
+        when IT->position is set up wrongly due to some bug.  Set
+        IT->current to match the bidi iterator unconditionally.
+        (push_display_prop): Allow GET_FROM_STRING as IT->method on
+        entry.  Force push_it to save on the stack the current
+        buffer/string position, to be restored by pop_it.  Fix flags in
+        the iterator structure wrt the object coming from a display
+        property, as `line-prefix' and `wrap-prefix' are not ``replacing''
+        properties.  (Bug#9284)
+
 2011-08-09  Andreas Schwab  <schwab@linux-m68k.org>
 
         * fontset.c (fontset_get_font_group): Add proper type checks.