* [PATCH] Re-enable SIGIO when waiting for events @ 2015-07-11 11:58 Mike Crowe 2015-07-17 8:45 ` Alex Bennée 0 siblings, 1 reply; 14+ messages in thread From: Mike Crowe @ 2015-07-11 11:58 UTC (permalink / raw) To: Emacs Developers; +Cc: Mike Crowe Pasting a large string into an Emacs tty frame causes keyboard.c:kbd_buffer_store_buffered_event to call ignore_sigio() which sets SIGIO to SIG_IGN. Unfortunately no-one seems to ever re-enable the SIGIO handler. This leads to timeouts when attempting to paste into an Emacs X11 frame as reported at http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16737 . It appears that keyboard.c:kbd_buffer_get_event used to re-enable the signal handler but that was removed as part of a large signal-handling clean up in 4d7e6e51dd4acecff466a28d958c50f34fc130b8. Reinstating the re-enabling of SIGIO in kbd_buffer_get_event solves the problems reported in bug 16737 for me. * src/keyboard.c (kbd_buffer_get_event): Re-enable SIGIO when waiting for event. --- src/keyboard.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/keyboard.c b/src/keyboard.c index c5a392f..e710d5a 100644 --- a/src/keyboard.c +++ b/src/keyboard.c @@ -316,6 +316,8 @@ static Lisp_Object command_loop (void); static void echo_now (void); static ptrdiff_t echo_length (void); +static void deliver_input_available_signal (int sig); + /* Incremented whenever a timer is run. */ unsigned timers_run; @@ -3849,6 +3851,14 @@ kbd_buffer_get_event (KBOARD **kbp, /* Start reading input again because we have processed enough to be able to accept new events again. */ unhold_keyboard_input (); +#ifdef USABLE_SIGIO + if (!noninteractive) + { + struct sigaction action; + emacs_sigaction_init (&action, deliver_input_available_signal); + sigaction (SIGIO, &action, 0); + } +#endif start_polling (); } #endif /* subprocesses */ -- 2.1.4 ^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-11 11:58 [PATCH] Re-enable SIGIO when waiting for events Mike Crowe @ 2015-07-17 8:45 ` Alex Bennée 2015-07-17 8:50 ` Tassilo Horn 0 siblings, 1 reply; 14+ messages in thread From: Alex Bennée @ 2015-07-17 8:45 UTC (permalink / raw) To: Mike Crowe; +Cc: Emacs Developers Mike Crowe <mac@mcrowe.com> writes: > Pasting a large string into an Emacs tty frame causes > keyboard.c:kbd_buffer_store_buffered_event to call ignore_sigio() > which sets SIGIO to SIG_IGN. > > Unfortunately no-one seems to ever re-enable the SIGIO handler. > > This leads to timeouts when attempting to paste into an Emacs X11 > frame as reported at > http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16737 . > > It appears that keyboard.c:kbd_buffer_get_event used to re-enable the > signal handler but that was removed as part of a large signal-handling > clean up in 4d7e6e51dd4acecff466a28d958c50f34fc130b8. > > Reinstating the re-enabling of SIGIO in kbd_buffer_get_event solves > the problems reported in bug 16737 for me. I've patched my local emacs-24 branch and will give it a spin to see if the problem still occurs. Thanks! -- Alex Bennée ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-17 8:45 ` Alex Bennée @ 2015-07-17 8:50 ` Tassilo Horn 2015-07-17 19:00 ` Paul Eggert 0 siblings, 1 reply; 14+ messages in thread From: Tassilo Horn @ 2015-07-17 8:50 UTC (permalink / raw) To: Alex Bennée; +Cc: Mike Crowe, Emacs Developers Alex Bennée <alex.bennee@linaro.org> writes: >> Reinstating the re-enabling of SIGIO in kbd_buffer_get_event solves >> the problems reported in bug 16737 for me. > > I've patched my local emacs-24 branch and will give it a spin to see > if the problem still occurs. Thanks! I'm using it since yesterday and didn't see that issue anymore although I've done some heavy c&p-ing between my browser and emacs which used to trigger the problem with a very high likelyhood. Bye, Tassilo ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-17 8:50 ` Tassilo Horn @ 2015-07-17 19:00 ` Paul Eggert 2015-07-21 12:42 ` Mike Crowe 0 siblings, 1 reply; 14+ messages in thread From: Paul Eggert @ 2015-07-17 19:00 UTC (permalink / raw) To: Tassilo Horn, Emacs Development; +Cc: Alex Bennée, Mike Crowe Tassilo Horn wrote: > I'm using it since yesterday and didn't see that issue anymore although > I've done some heavy c&p-ing between my browser and emacs which used to > trigger the problem with a very high likelyhood. Thanks for checking. I installed a similar patch as Emacs master commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please give it a try? It is like Mike Crowe's patch, except it avoids a race that could lose SIGIOs. I'll also send a heads-up email to the relevant bug reports. ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-17 19:00 ` Paul Eggert @ 2015-07-21 12:42 ` Mike Crowe 2015-07-30 16:31 ` Mike Crowe 0 siblings, 1 reply; 14+ messages in thread From: Mike Crowe @ 2015-07-21 12:42 UTC (permalink / raw) To: Paul Eggert; +Cc: Emacs Development, Alex Bennée, Tassilo Horn On Friday 17 July 2015 at 12:00:17 -0700, Paul Eggert wrote: > Tassilo Horn wrote: > > >I'm using it since yesterday and didn't see that issue anymore although > >I've done some heavy c&p-ing between my browser and emacs which used to > >trigger the problem with a very high likelyhood. > > Thanks for checking. I installed a similar patch as Emacs master commit > 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please give it a try? > It is like Mike Crowe's patch, except it avoids a race that could lose > SIGIOs. I'll also send a heads-up email to the relevant bug reports. I prefer your version and will switch to testing it instead. Thanks. Mike. ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-21 12:42 ` Mike Crowe @ 2015-07-30 16:31 ` Mike Crowe 2015-07-30 18:49 ` bug#16737: " Tassilo Horn 2015-07-30 18:49 ` Tassilo Horn 0 siblings, 2 replies; 14+ messages in thread From: Mike Crowe @ 2015-07-30 16:31 UTC (permalink / raw) To: Paul Eggert; +Cc: Emacs Development On Tuesday 21 July 2015 at 13:42:20 +0100, Mike Crowe wrote: > On Friday 17 July 2015 at 12:00:17 -0700, Paul Eggert wrote: > > Tassilo Horn wrote: > > > > >I'm using it since yesterday and didn't see that issue anymore although > > >I've done some heavy c&p-ing between my browser and emacs which used to > > >trigger the problem with a very high likelyhood. > > > > Thanks for checking. I installed a similar patch as Emacs master commit > > 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please give it a try? > > It is like Mike Crowe's patch, except it avoids a race that could lose > > SIGIOs. I'll also send a heads-up email to the relevant bug reports. > > I prefer your version and will switch to testing it instead. I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now without seeing any problems so I think we can call the bug fixed. Thanks Paul! Mike. ^ permalink raw reply [flat|nested] 14+ messages in thread
* bug#16737: [PATCH] Re-enable SIGIO when waiting for events 2015-07-30 16:31 ` Mike Crowe @ 2015-07-30 18:49 ` Tassilo Horn 2015-07-30 18:49 ` Tassilo Horn 1 sibling, 0 replies; 14+ messages in thread From: Tassilo Horn @ 2015-07-30 18:49 UTC (permalink / raw) To: Mike Crowe; +Cc: Paul Eggert, 16737-done, Emacs Development Mike Crowe <mac@mcrowe.com> writes: >> > Thanks for checking. I installed a similar patch as Emacs master >> > commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please >> > give it a try? It is like Mike Crowe's patch, except it avoids a >> > race that could lose SIGIOs. I'll also send a heads-up email to >> > the relevant bug reports. >> >> I prefer your version and will switch to testing it instead. > > I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 > applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now > without seeing any problems so I think we can call the bug fixed. And I run the git head updating daily, and the issue didn't occur to me since that commit whereas it bit me several times a day before. So I can confirm that it's fixed (as multiple other already did in the debbugs issue), so I close it with this mail. Thanks! Tassilo ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-30 16:31 ` Mike Crowe 2015-07-30 18:49 ` bug#16737: " Tassilo Horn @ 2015-07-30 18:49 ` Tassilo Horn 2015-07-31 6:03 ` Alex Bennée 2015-07-31 6:03 ` bug#16737: [PATCH] Re-enable SIGIO when waiting for events Alex Bennée 1 sibling, 2 replies; 14+ messages in thread From: Tassilo Horn @ 2015-07-30 18:49 UTC (permalink / raw) To: Mike Crowe; +Cc: Paul Eggert, 16737-done, Emacs Development Mike Crowe <mac@mcrowe.com> writes: >> > Thanks for checking. I installed a similar patch as Emacs master >> > commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please >> > give it a try? It is like Mike Crowe's patch, except it avoids a >> > race that could lose SIGIOs. I'll also send a heads-up email to >> > the relevant bug reports. >> >> I prefer your version and will switch to testing it instead. > > I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 > applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now > without seeing any problems so I think we can call the bug fixed. And I run the git head updating daily, and the issue didn't occur to me since that commit whereas it bit me several times a day before. So I can confirm that it's fixed (as multiple other already did in the debbugs issue), so I close it with this mail. Thanks! Tassilo ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-30 18:49 ` Tassilo Horn @ 2015-07-31 6:03 ` Alex Bennée 2015-08-05 14:28 ` Mike Crowe 2015-07-31 6:03 ` bug#16737: [PATCH] Re-enable SIGIO when waiting for events Alex Bennée 1 sibling, 1 reply; 14+ messages in thread From: Alex Bennée @ 2015-07-31 6:03 UTC (permalink / raw) To: Tassilo Horn; +Cc: Paul Eggert, Mike Crowe, 16737-done, Emacs Development Tassilo Horn <tsdh@gnu.org> writes: > Mike Crowe <mac@mcrowe.com> writes: > >>> > Thanks for checking. I installed a similar patch as Emacs master >>> > commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please >>> > give it a try? It is like Mike Crowe's patch, except it avoids a >>> > race that could lose SIGIOs. I'll also send a heads-up email to >>> > the relevant bug reports. >>> >>> I prefer your version and will switch to testing it instead. >> >> I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 >> applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now >> without seeing any problems so I think we can call the bug fixed. > > And I run the git head updating daily, and the issue didn't occur to me > since that commit whereas it bit me several times a day before. So I > can confirm that it's fixed (as multiple other already did in the > debbugs issue), so I close it with this mail. Will it get applied to the emacs-24 branch or is that considered dead now? > > Thanks! > Tassilo -- Alex Bennée ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-07-31 6:03 ` Alex Bennée @ 2015-08-05 14:28 ` Mike Crowe 2015-08-05 17:46 ` Paul Eggert 0 siblings, 1 reply; 14+ messages in thread From: Mike Crowe @ 2015-08-05 14:28 UTC (permalink / raw) To: Emacs Development, Paul Eggert; +Cc: Alex Bennée [-- Attachment #1: Type: text/plain, Size: 1082 bytes --] Paul Eggert wrote: >>>>> Thanks for checking. I installed a similar patch as Emacs master >>>>> commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please >>>>> give it a try? It is like Mike Crowe's patch, except it avoids a >>>>> race that could lose SIGIOs. I'll also send a heads-up email to the >>>>> relevant bug reports. I wrote: >>> I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 >>> applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now >>> without seeing any problems so I think we can call the bug fixed. On Friday 31 July 2015 at 07:03:39 +0100, Alex Bennée wrote: > Will it get applied to the emacs-24 branch or is that considered dead now? I'm sort of hoping that I can get this fix into a Debian Jessie stable update. It being in upstream emacs-24 would make this more rather more likely. (Debian doesn't allow stuff to be fixed in stable that isn't already fixed in unstable.) Is there any chance of committing the fix to emacs-24? It doesn't cherry-pick cleanly but only requires minor fixing (attached.) Thanks. Mike. [-- Attachment #2: 0001-Fix-hang-with-large-yanks.patch --] [-- Type: text/x-diff, Size: 3407 bytes --] From d47c5b810123c6cbd14dd38ac461aa01a4eabacf Mon Sep 17 00:00:00 2001 From: Paul Eggert <eggert@cs.ucla.edu> Date: Fri, 17 Jul 2015 11:54:24 -0700 Subject: [PATCH] Fix hang with large yanks Backport of emacs-25 0592cefd03f1de2f04b721d07a16e6e0a9e48f73. Upstream comment follows: Fix hang with large yanks This should fix the bug fixed by Mike Crowe's patch in: https://lists.gnu.org/archive/html/emacs-devel/2015-07/msg00106.html A problem in this area has been reported by several users; see Bug#16737, Bug#17101, Bug#17026, Bug#17172, Bug#19320, Bug#20283. This fix differs from Mike Crowe's patch in that it should avoid a race condition that could lose SIGIO signals. ignore_sigio dates back to the 1980s when some platforms couldn't block signals, and could only ignore them, which led to races when signals arrived while being ignored. We shouldn't have to worry about those old platforms now. * src/dispextern.h, src/sysdep.c (ignore_sigio): Remove. * src/emacs.c (shut_down_emacs): Don't call ignore_sigio; unrequest_sigio should suffice. * src/keyboard.c (kbd_buffer_store_buffered_event): Use unrequest_sigio, not ignore_sigio. (kbd_buffer_get_event): Call request_sigio when getting the ball rolling again. Conflicts: src/sysdep.c --- src/dispextern.h | 1 - src/emacs.c | 1 - src/keyboard.c | 4 ++-- src/sysdep.c | 9 --------- 4 files changed, 2 insertions(+), 13 deletions(-) diff --git a/src/dispextern.h b/src/dispextern.h index 239c442..cf3d1ec 100644 --- a/src/dispextern.h +++ b/src/dispextern.h @@ -3349,7 +3349,6 @@ void unrequest_sigio (void); bool tabs_safe_p (int); void init_baud_rate (int); void init_sigio (int); -void ignore_sigio (void); /* Defined in xfaces.c. */ diff --git a/src/emacs.c b/src/emacs.c index 9b78a70..b5d3ab4 100644 --- a/src/emacs.c +++ b/src/emacs.c @@ -2028,7 +2028,6 @@ shut_down_emacs (int sig, Lisp_Object stuff) /* There is a tendency for a SIGIO signal to arrive within exit, and cause a SIGHUP because the input descriptor is already closed. */ unrequest_sigio (); - ignore_sigio (); /* Do this only if terminating normally, we want glyph matrices etc. in a core dump. */ diff --git a/src/keyboard.c b/src/keyboard.c index 945019e..77af44a 100644 --- a/src/keyboard.c +++ b/src/keyboard.c @@ -3663,8 +3663,7 @@ kbd_buffer_store_event_hold (register struct input_event *event, /* Don't read keyboard input until we have processed kbd_buffer. This happens when pasting text longer than KBD_BUFFER_SIZE/2. */ hold_keyboard_input (); - if (!noninteractive) - ignore_sigio (); + unrequest_sigio (); stop_polling (); } #endif /* subprocesses */ @@ -3829,6 +3828,7 @@ kbd_buffer_get_event (KBOARD **kbp, /* Start reading input again because we have processed enough to be able to accept new events again. */ unhold_keyboard_input (); + request_sigio (); start_polling (); } #endif /* subprocesses */ diff --git a/src/sysdep.c b/src/sysdep.c index 01692c2..4b4801d 100644 --- a/src/sysdep.c +++ b/src/sysdep.c @@ -649,15 +649,6 @@ unrequest_sigio (void) interrupts_deferred = 1; #endif } - -void -ignore_sigio (void) -{ -#ifdef USABLE_SIGIO - signal (SIGIO, SIG_IGN); -#endif -} - \f /* Saving and restoring the process group of Emacs's terminal. */ -- 2.1.4 ^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events 2015-08-05 14:28 ` Mike Crowe @ 2015-08-05 17:46 ` Paul Eggert 2015-09-13 18:57 ` [PATCH] Re-enable SIGIO when waiting for events (bug# 16737) Alan D. Salewski 0 siblings, 1 reply; 14+ messages in thread From: Paul Eggert @ 2015-08-05 17:46 UTC (permalink / raw) To: Mike Crowe, Emacs Development; +Cc: Alex Bennée On 08/05/2015 07:28 AM, Mike Crowe wrote: > Is there any chance of committing the fix to emacs-24? It doesn't > cherry-pick cleanly but only requires minor fixing (attached.) Don't see why not. I pushed it. I doubt whether emacs-24 will be used for any new release, so this is mostly just a bookkeeping entry. ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Re-enable SIGIO when waiting for events (bug# 16737) 2015-08-05 17:46 ` Paul Eggert @ 2015-09-13 18:57 ` Alan D. Salewski 2015-09-13 19:14 ` bug#16737: " Alan D. Salewski 0 siblings, 1 reply; 14+ messages in thread From: Alan D. Salewski @ 2015-09-13 18:57 UTC (permalink / raw) To: emacs-devel, 16737 On 2015-08-05 10:46:21, Paul Eggert spake thus: > On 08/05/2015 07:28 AM, Mike Crowe wrote: > >Is there any chance of committing the fix to emacs-24? It doesn't > >cherry-pick cleanly but only requires minor fixing (attached.) > > Don't see why not. I pushed it. I doubt whether emacs-24 will be > used for any new release, so this is mostly just a bookkeeping > entry. I just want to say thanks to all who have contributed to addressing this bug, and especially to Mike Crowe for homing in on the problem and Paul Eggert for the final fix (and its application to both branches[0]). I very much appreciate all the time and effort folks have expended on this issue. Thank you! -Al [0] master (commit: 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 ) and emacs-24 (commit: a27ae9d7650a1230d4359eaf0a949f827315a6d2 ) ^ permalink raw reply [flat|nested] 14+ messages in thread
* bug#16737: [PATCH] Re-enable SIGIO when waiting for events (bug# 16737) 2015-09-13 18:57 ` [PATCH] Re-enable SIGIO when waiting for events (bug# 16737) Alan D. Salewski @ 2015-09-13 19:14 ` Alan D. Salewski 0 siblings, 0 replies; 14+ messages in thread From: Alan D. Salewski @ 2015-09-13 19:14 UTC (permalink / raw) To: 16737 [Sent this to emacs-devel, too, but needed to "unarchive" the bug in the bug tracker and then re-send separately to add this comment] On 2015-09-13 14:57:23, Alan D. Salewski spake thus: > On 2015-08-05 10:46:21, Paul Eggert spake thus: > > On 08/05/2015 07:28 AM, Mike Crowe wrote: > > >Is there any chance of committing the fix to emacs-24? It doesn't > > >cherry-pick cleanly but only requires minor fixing (attached.) > > > > Don't see why not. I pushed it. I doubt whether emacs-24 will be > > used for any new release, so this is mostly just a bookkeeping > > entry. > > I just want to say thanks to all who have contributed to addressing this > bug, and especially to Mike Crowe for homing in on the problem and Paul > Eggert for the final fix (and its application to both branches[0]). I > very much appreciate all the time and effort folks have expended on this > issue. > > Thank you! > > -Al > > > [0] master (commit: 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 ) > and > emacs-24 (commit: a27ae9d7650a1230d4359eaf0a949f827315a6d2 ) > ^ permalink raw reply [flat|nested] 14+ messages in thread
* bug#16737: [PATCH] Re-enable SIGIO when waiting for events 2015-07-30 18:49 ` Tassilo Horn 2015-07-31 6:03 ` Alex Bennée @ 2015-07-31 6:03 ` Alex Bennée 1 sibling, 0 replies; 14+ messages in thread From: Alex Bennée @ 2015-07-31 6:03 UTC (permalink / raw) To: Tassilo Horn; +Cc: Paul Eggert, Mike Crowe, 16737-done, Emacs Development Tassilo Horn <tsdh@gnu.org> writes: > Mike Crowe <mac@mcrowe.com> writes: > >>> > Thanks for checking. I installed a similar patch as Emacs master >>> > commit 0592cefd03f1de2f04b721d07a16e6e0a9e48f73; could you please >>> > give it a try? It is like Mike Crowe's patch, except it avoids a >>> > race that could lose SIGIOs. I'll also send a heads-up email to >>> > the relevant bug reports. >>> >>> I prefer your version and will switch to testing it instead. >> >> I've been testing with 0592cefd03f1de2f04b721d07a16e6e0a9e48f73 >> applied to Debian Jessie's emacs24 (24.4+1-5) for over a week now >> without seeing any problems so I think we can call the bug fixed. > > And I run the git head updating daily, and the issue didn't occur to me > since that commit whereas it bit me several times a day before. So I > can confirm that it's fixed (as multiple other already did in the > debbugs issue), so I close it with this mail. Will it get applied to the emacs-24 branch or is that considered dead now? > > Thanks! > Tassilo -- Alex Bennée ^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2015-09-13 19:14 UTC | newest] Thread overview: 14+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2015-07-11 11:58 [PATCH] Re-enable SIGIO when waiting for events Mike Crowe 2015-07-17 8:45 ` Alex Bennée 2015-07-17 8:50 ` Tassilo Horn 2015-07-17 19:00 ` Paul Eggert 2015-07-21 12:42 ` Mike Crowe 2015-07-30 16:31 ` Mike Crowe 2015-07-30 18:49 ` bug#16737: " Tassilo Horn 2015-07-30 18:49 ` Tassilo Horn 2015-07-31 6:03 ` Alex Bennée 2015-08-05 14:28 ` Mike Crowe 2015-08-05 17:46 ` Paul Eggert 2015-09-13 18:57 ` [PATCH] Re-enable SIGIO when waiting for events (bug# 16737) Alan D. Salewski 2015-09-13 19:14 ` bug#16737: " Alan D. Salewski 2015-07-31 6:03 ` bug#16737: [PATCH] Re-enable SIGIO when waiting for events Alex Bennée
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