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bug#5037: Asserion failure in draw_row_fringe_bitmaps
From: |
Stefan Monnier |
Subject: |
bug#5037: Asserion failure in draw_row_fringe_bitmaps |
Date: |
Wed, 25 Nov 2009 10:51:31 -0500 |
Package: Emacs
Version: 23.1.50
Please describe exactly what actions triggered the bug
and the precise symptoms of the bug. If you can, give
a recipe starting from `emacs -Q':
I got an assertion failure in draw_row_fringe_bitmaps:
xassert (interrupt_input_blocked);
when resizing the frame while Gnus was waiting for network data (or
connection).
It seems there's a BLOCK_INPUT missing somewhere long that path.
I've added a BLOCK_INPUT in event_handler_gdk and it seems to work, but
I don't understand enough of how those things work to know whether
that's the right place. Can someone confirm that the patch below
is right?
Stefan
=== modified file 'src/xterm.c'
--- src/xterm.c 2009-11-24 17:03:04 +0000
+++ src/xterm.c 2009-11-25 15:35:23 +0000
@@ -5738,6 +5738,45 @@
{
XEvent *xev = (XEvent *) gxev;
+ /* It appears we need to block input somewhere around here.
+ Otherwise we can get an assertion failure in
+ draw_row_fringe_bitmaps which checks interrupts are blocked:
+
+ #0 0xb7fe1424 in __kernel_vsyscall ()
+ #1 0xb7386bd6 in kill () from /lib/i686/cmov/libc.so.6
+ #2 0x08188533 in abort () at emacs.c:432
+ #3 0x081748c7 in draw_row_fringe_bitmaps (w=0x7a69, row=0x8fa3978)
+ at fringe.c:881
+ #4 0x0807b563 in expose_line (w=0x8b10f58, row=0x8fa3978, r=0xbfffbdcc)
+ at xdisp.c:24141
+ #5 0x0807f289 in expose_window (w=0x8b10f58, fr=0xbfffbe34) at
xdisp.c:24365
+ #6 0x0807f697 in expose_window_tree (w=0x8b10f58, r=0xbfffbe34)
+ atup xdisp.c:24438
+ #7 0x08094834 in expose_frame (f=0x8b10cc8, x=95, y=252, w=99, h=5)
+ at xdisp.c:24495
+ #8 0x0814f13c in handle_one_xevent (dpyinfo=0x8a27000,
eventp=0xbfffc65c,
+ finish=0xbfffc3e4, hold_quit=0x0) at xterm.c:6095
+ #9 0x08150db9 in x_dispatch_event (event=0xbfffc65c, display=0x89fd000)
+ at xterm.c:7026
+ #10 0x08150e68 in event_handler_gdk (gxev=0xbfffc65c, ev=0x8a11148,
data=0x0)
+ at xterm.c:5766
+ #11 0xb7bbf558 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
+ #12 0xb7bc113d in ?? () from /usr/lib/libgdk-x11-2.0.so.0
+ #13 0xb7bc154f in ?? () from /usr/lib/libgdk-x11-2.0.so.0
+ #14 0xb782ee98 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
+ #15 0x08180034 in xg_select (max_fds=10, rfds=0xbfffcba8, wfds=0x0,
efds=0x0,
+ timeout=0xbfffcb1c) at xgselect.c:135
+ #16 0x08290fdc in wait_reading_process_output (time_limit=0,
microsecs=10000,
+ read_kbd=0, do_display=0, wait_for_cell=..., wait_proc=0x8f35708,
+ just_wait_proc=0) at process.c:4930
+ #17 0x08294aff in Faccept_process_output (process=..., seconds=...,
+ millisec=..., just_this_one=...) at process.c:4311
+
+ Also, another caller to x_dispatch_event (xmenu.c:popup_get_selection)
+ also warns that the interrupts need to be blocked by its callers.
+ */
+ BLOCK_INPUT;
+
if (current_count >= 0)
{
struct x_display_info *dpyinfo;
@@ -5765,6 +5804,8 @@
else
current_finish = x_dispatch_event (xev, xev->xany.display);
+ UNBLOCK_INPUT;
+
if (current_finish == X_EVENT_GOTO_OUT || current_finish == X_EVENT_DROP)
return GDK_FILTER_REMOVE;
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