[Emacs-diffs] master a2f9049: Avoid aborts when input-method-function changes this-command-keys (Bug#19774)

[Eli Zaretskii]

branch: master
commit a2f904981d10d68bd84b6c7233a79094f052fa8a
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Avoid aborts when input-method-function changes this-command-keys  
(Bug#19774)
    
     src/keyboard.c (read_char): Make sure this_single_command_key_start
     is in sync with this_command_key_count, around the call to
     input-method-function.
---
 src/ChangeLog  |    6 ++++++
 src/keyboard.c |    4 ++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/src/ChangeLog b/src/ChangeLog
index 8713353..38af1d8 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2015-02-19  Eli Zaretskii  <address@hidden>
+
+       * keyboard.c (read_char): Make sure this_single_command_key_start
+       is in sync with this_command_key_count, around the call to
+       input-method-function.  (Bug#19774)
+
 2015-02-19  Fujii Hironori  <address@hidden>  (tiny change)
 
        * w32fns.c (w32_wnd_proc) <WM_IME_STARTCOMPOSITION>: Pass the
diff --git a/src/keyboard.c b/src/keyboard.c
index 4f6a441..ab57553 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -3034,6 +3034,7 @@ read_char (int commandflag, Lisp_Object map,
       Lisp_Object keys;
       ptrdiff_t key_count;
       bool key_count_reset;
+      ptrdiff_t command_key_start;
       struct gcpro gcpro1;
       ptrdiff_t count = SPECPDL_INDEX ();
 
@@ -3057,6 +3058,7 @@ read_char (int commandflag, Lisp_Object map,
       /* Save the this_command_keys status.  */
       key_count = this_command_key_count;
       key_count_reset = this_command_key_count_reset;
+      command_key_start = this_single_command_key_start;
 
       if (key_count > 0)
        keys = Fcopy_sequence (this_command_keys);
@@ -3067,6 +3069,7 @@ read_char (int commandflag, Lisp_Object map,
       /* Clear out this_command_keys.  */
       this_command_key_count = 0;
       this_command_key_count_reset = 0;
+      this_single_command_key_start = 0;
 
       /* Now wipe the echo area.  */
       if (!NILP (echo_area_buffer[0]))
@@ -3090,6 +3093,7 @@ read_char (int commandflag, Lisp_Object map,
         and this_command_keys state.  */
       this_command_key_count = key_count;
       this_command_key_count_reset = key_count_reset;
+      this_single_command_key_start = command_key_start;
       if (key_count > 0)
        this_command_keys = keys;