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Comparing Coro/Changes (file contents):
Revision 1.100 by root, Mon Mar 21 14:35:45 2005 UTC vs.
Revision 1.361 by root, Sat Jun 28 23:14:19 2008 UTC

1Revision history for Perl extension Coro. 1Revision history for Perl extension Coro.
2 2
3TODO: should explore PerlIO::via::CoroCede and PerlIO::via::CoroAIO.
4TODO: maybe implement a default message channel, very much like Erlang's
5 actor model (which is cool in a lot of important aspects (failures!),
6 but very lacking in others (higher level ipc)).
7
8 - correctly provide default DIE/WARN handlers as documented.
9 - also overwrite PL_vtbl_sigelem.svt_clear, even though current
10 implementations inside perl work fine for us.
11
124.743 Mon Jun 16 00:21:57 CEST 2008
13 - when using Coro::EV without running EV::loop it could
14 result in busy-waiting for events, this has been fixed.
15 - reduce codesize and improve performance by using EV_DEFAULT_UC.
16
174.742 Sat May 31 14:10:21 CEST 2008
18 - implement a workaround for (some) perl <5.8.8 versions.
19 - require EV 3.3+.
20
214.741 Fri May 30 23:33:09 CEST 2008
22 - tell netbsd how utterly broken their imitation of an OS is
23 and refuse to build by default if pthreads are in use.
24 - switch to "s" method on all bsd's by default, as their ucontext
25 stuff seems just too broken.
26 - fix a bug in Coro::Select.
27
284.74 Thu May 29 20:05:31 CEST 2008
29 - do not test Coro::LWP for lack of dependencies.
30 - do not test Coro::Select for lack of working perls.
31
324.73 Thu May 29 2008
33 - fix a bug in Coro::EV which would cause it to block despite
34 there being runnable coroutines.
35 - sprinkle "no warnings" freely over everything, also suppress
36 warnings for some other modules.
37 - fix typo in WSAEWOULDBLOCK.
38
394.72 Sun May 25 05:14:36 CEST 2008
40 - tweak META.yaml a bit, unfortunately, there is no documented way
41 to have optional dependencies with CPAN. doh :(
42 - avoid running some tests on windows because they would fail due to
43 perl bug (broken fork, broken pipes...).
44 - work around perl on windows bugs where perl returns undocumented
45 error codes for sysread, syswrite etc. by taking advantage
46 of AnyEvent's workaround for that problem.
47 - use AnyEvent::Util::fh_nonblocking in Coro::Handle to work around
48 a common perl implementation bug on windows.
49 - use unix domain sockets in testsuite to work around
50 common perl implementation bugs on widows (they are emulated by
51 tcp sockets on windows. ugh.)
52
534.71 Sat May 24 20:01:27 CEST 2008
54 - fix a bug in Coro::AnyEvent ("Usage: Coro::AnyEvent::_schedule()").
55 - take advantage of async name resolution of AnyEvent::Util.
56 - work around brutal inet_aton override in Coro::LWP.
57 - take advantage of the readyhook in Coro::EV, for smoother
58 scheduling.
59
604.7 Sun May 11 00:32:19 CEST 2008
61 - completely reworked the Coro manpage.
62 - added Coro::AnyEvent, generic event loop integration.
63 - implement cancel, ready and kill commands in Coro::Debug.
64 - document find_coro in Coro::Debug.
65 - incompatible change: rename has_stack to has_cctx.
66 - Coro::AIO and Coro::BDB no longer force event model detection,
67 use AnyEvent::AIO and AnyEvent::BDB.
68
694.6 Sat Apr 26 10:05:14 CEST 2008
70 - INCOMPATIBLE CHANGE: sub/code attributes are no longer supported
71 by the Coro module. It was a mistake to have it in the first place.
72 - (experimental) support for activestate perl 5.10 (method "w").
73 - (experimental) support for strawberry perl (method "a").
74 - coro_sigelem_set did not return a value although it had to,
75 actual impact unknown.
76
774.51 Mon Apr 14 13:28:27 CEST 2008
78 - make it compile again on 5.8.
79
804.50 Thu Apr 10 09:43:17 CEST 2008
81 - I did it twice! (see 4.49).
82
834.49 Sun Apr 6 21:23:31 CEST 2008
84 - grr, instead of compiling the recent changes on 5.10 only they
85 were compiled on 5.8 only.
86
874.48 Sun Apr 6 20:36:46 CEST 2008
88 - allow coroutine switches during eval's under 5.10.x, as it seems
89 the parser is a per-interpreter option now, so this is safe
90 (this might fix the odd crashing bug).
91 - drop support for 5.9.x versions: they are dead, jim.
92
934.47 Sun Apr 6 00:37:52 CEST 2008
94 - force cctx allocation on API calls: we know we need to force one
95 and gcc actually manages to confuse our heuristic nowadays,
96 leading to crashes and worse.
97 - document force_cctx.
98
994.46 Fri Apr 4 22:05:43 CEST 2008
100 - upgrade libcoro, resulting in pthread-backend (which was only created
101 to fulfill the rules of the programming languages shootout).
102
1034.45 Thu Mar 13 11:55:36 CET 2008
104 - fix a file leaking bug in eg/mhyttpd that would allow
105 downloading of any file (reported by oesi).
106 - fix deadlock bug in Coro::Channel (reported by Richard Hundt)
107 (also add testcase).
108 - support Broadcast option in Coro::Socket (patch by Richard Hundt,
109 apparently having loads of fun with that).
110 - implement $state->swap_defsv, ->swap_defav and document ->throw.
111
1124.4 Wed Feb 13 16:44:29 CET 2008
113 - only assume .cfi pseudo isns exist on GNU/Linux.
114 - add get_timed method to Coro::Channels.
115 - fixed Coro::Debug manpage.
116 - perl 5.11 compatbility improvement based on patch by
117 Andreas König.
118
1194.37 Sun Jan 20 11:25:23 CET 2008
120 - soften the check for an active parser for perl 5.10 (avoiding
121 "Coro::State::transfer called while parsing" in many cases).
122
1234.36 Sun Jan 13 10:53:56 CET 2008
124 - reset diehook when terminating from an async_pool as to not
125 trigger any __DIE__ handlers.
126
1274.35 Sun Jan 13 04:14:13 CET 2008
128 - "bt" debug command now displays any exceptions
129 from longmess and also skips the innermost
130 stackframes, giving more useufl output.
131 - allow backtraces in coroutines blocked in Coro::EV,
132 at a <1% speed hit.
133 - handle localising of $SIG{__WARN__} and __DIE__
134 properly (with a proper amount of dirty hacking).
135
1364.34 Sat Dec 22 17:49:53 CET 2007
137 - upgrade to EV version 2.0 API.
138
1394.33 Mon Dec 17 08:36:12 CET 2007
140 - make Coro::AIO etc. loadable in the absence of EV.
141
1424.32 Mon Dec 17 07:46:02 CET 2007
143 - majorly improved Coro::Handle's performance with Coro::EV.
144 - implemented the until now mythical Coro::BDB module.
145 - specialcase EV in Coro::AIO and Coro::BDB for extra speed.
146
1474.31 Wed Dec 5 12:32:39 CET 2007
148 - remove warn statement form Coro::Util.
149
1504.3 Tue Dec 4 20:33:14 CET 2007
151 - calls to the idle function could cause stack corruption
152 when the stack changed.
153 - do no longer rely on the presence of EV::DNS if EV is used
154 (because it is gone), but instead take avdantage of EV::ADNS
155 if available.
156 - add ($) prototypes to all functions in Coro::Storable.
157 - use a conventional (safer) idle callback in Coro::EV.
158 - do accept quickly in Coro::Debug to avoid endless loops.
159
1604.22 Fri Nov 30 16:04:04 CET 2007
161 - really use optimised versions for Event and EV in Coro::Util
162 and Coro::Handle.
163
1644.21 Sun Nov 25 10:48:59 CET 2007
165 - fix a spurious memory read.
166 - Coro::EV no longer keeps the eventloop "alive".
167
1684.2 Fri Nov 9 20:47:05 CET 2007
169 - enable/disable tracing from a new coroutine, not a pooled one.
170 - fix a memleak in Coro::Event.
171 - removed killall call from fork_eval.
172 - made sure store_fd is already loaded so that fork_eval
173 does not have to parse autoload in each subprocess.
174 - only use assembly method if -O switch is in $Config{optimize}.
175 - add (optional) Coro::EV module, so far the best event loop module
176 directly supported by Coro.
177 - if the event model is EV, use EV::DNS to resolve
178 stuff in Coro::Util.
179 - don't get confused by multiple event notifications in Coro::Handle.
180 - initial support for EV (libevent interface).
181 - require Event and EV using configure_requires, to force their existance.
182
1834.13 Wed Oct 24 07:26:45 CEST 2007
184 - add Coro::Storable::blocking_thaw.
185 - use a vastly more complicated technique to localise
186 $SIG{__WARN/DIE__} that also works on perls <= 5.8.8.
187 - use a coroutine for the idle callback Coro::Event,
188 instead of running Event in the current coroutine context.
189 This also catches recursive invocations.
190 - actually report fork errors in gethostbyname and inet_aton.
191
1924.11 Thu Oct 11 02:40:24 CEST 2007
193 - port to threaded perls.
194
1954.1 Thu Oct 11 02:38:16 CEST 2007
196 - incompatible change: $SIG{__DIE__} and $SIG{__WARN__} will now
197 be local to each coro (see Coro::State).
198 - incompatible change: for very deep reasons, cede and cede_notself
199 cannot return anything, so nothing will be returned.
200 - possibly bring back 5.10 compatibility (untested).
201 - work around stupid (and wrong) warning on 5.10 :(.
202 - overlay the saved state over the context stack. This saves
203 a few hundred bytes per coroutine on average and also
204 speeds up context switching a bit.
205 - further tune default stack sizes.
206 - (more) correctly calculate stack usage in coro_rss.
207 - Coro::Storable::blocking_* did not properly lock
208 resulting in races between coroutines.
209 - added Coro::Storable::guard.
210 - stopping to trace a coroutine could destroy the cctx of
211 an unrelated coroutine.
212 - explain the relationship between Perl and C coroutines in
213 more detail in Coro::State.
214 - Coro::Util::inet_aton did not short-circuit dotted quad forms,
215 causing a fork per resolve. This also affected Coro::Socket.
216 - switch to a separate stack in $coro->call/eval to avoid
217 invalidating pointers.
218
2194.03 Sat Oct 6 21:24:00 CEST 2007
220 - added Coro::throw method.
221 - minor code cleanups.
222
2234.02 Sat Oct 6 02:36:47 CEST 2007
224 - fix a very minor per-coroutine memleak (a single codereference).
225 - fixed a bug where the currently in-use c context would be freed
226 prematurely (can happen only when programs change the stacksize
227 or use tracing).
228 - tracing can no longer keep a coro alive after it terminated.
229 - do static branch prediction in the common path for gcc. gives
230 about 2-5% speed improvement here.
231
2324.01 Fri Oct 5 22:10:49 CEST 2007
233 - instead of recreating *a* standard output handle we simply
234 use STDOUT, which is faster and hopefully more robust.
235
2364.0 Fri Oct 5 12:56:00 CEST 2007
237 - incompatibly changed Coro::Storable::freeze.
238 - major new feature: added Coro::Debug, for interactive coroutine
239 debugging, tracing and much more.
240 - major bug fix: unbelievable, but true: $_, $/ and many other
241 "saved" variables actually weren't being saved. This has been fixed,
242 of course, while increasing performance while losing all the save
243 flags.
244 - save flags are gone, and all the api functions dealing with them.
245 - added Coro::Semaphore::adjust.
246 - added Coro::Util::fork_eval.
247 - added Coro::Storable::{nfreeze,blocking_{freeze,nfreeze}}.
248 - added Coro::killall.
249 - reduce initial stack sizes to allow for "micro-coroutines".
250 - better async_pool resource management, moved parts of async_pool
251 handling to XS (major speed improvement).
252 - actually croak before modifying important data structures.
253 - refuse to transfer while compiling.
254 - possibly support eval EXPR better now.
255 - enable assembly per default on linux+bsd x86+amd64.
256 - all internal members were renamed _something for easier subclassing.
257 - many minor tweaks.
258
2593.63 Wed May 16 14:10:06 CEST 2007
260 - implement handcoded assembly for x86/amd64 SVR ABI.
261
2623.62 Fri Apr 27 21:36:06 CEST 2007
263 - upgrade libcoro (which might set unwind info correctly).
264 - change default on linux to setjmp/longjmp.
265
2663.61 Thu Apr 19 12:36:18 CEST 2007
267 - Coro::Storable caused an endless loop when thawing invalid
268 pst's sometimes.
269 - use a Semaphore in Coro::Storable, as Storable doesn't
270 seem to be reentrant (although it is documented to
271 be threadsafe...).
272 - fix Coro::Signal to bring back the original unreliable
273 but stateful semantics.
274 - fixed a lot of typos in Coro.pm (patch submitted by David
275 Steinbrunner, which applied flawlessly).
276
2773.6 Sat Apr 14 17:13:31 CEST 2007
278 - added some bugfixes to get eg/myhttpd working again.
279 - added Coro::Storable for often-cede'ing freeze/thaw.
280 - try to do a clean exit when a coroutine calls exit
281 (EXPERIMENTAL).
282 - got rid of indirect call through _coro_init.
283 - updated the partly antique examples in eg/ to
284 work again and be a bit less magic, too.
285 - fixed Coro::Signal semantics to work as documented again.
286
2873.55 Sun Mar 25 01:20:47 CET 2007
288 - add SAVE_DEFFH to save the default filehandle and enable
289 it by default.
290 - finally move socket-operations from Coro::Socket to Coro::Handle
291 to be able to unblock foreign sockets.
292 - add Coro::State::save_also and guarded_save.
293 - add count accessor to Coro::Semaphore.
294 - add Coro::State::cctx_stacksize.
295 - just for the fun of it, do not rely on implicit context,
296 which can dramatically improve performance, but people
297 using windows-process-emulation perls do not care much about
298 performance.
299
3003.51 Sun Mar 4 14:18:04 CET 2007
301 - fixed a problem when you weakened references to Coro::State's
302 (patch by Yuval Kogman).
303
3043.501 Wed Feb 28 12:44:07 CET 2007
305 - rename some global symbols as macosx from hell redefines
306 them without asking.
307
3083.5 Tue Feb 13 20:22:53 CET 2007
309 - do AnyEvent model detection earlier, avoiding problems
310 caused by first using AnyEvent and later Coro::Event.
311 - implement and document Coro::Event event objects.
312 - fix a potential problem in Coro::Event causing crashes.
313 - initialise PL_comppad when creating a new coroutine,
314 avoids crashes on early coro destruction.
315
3163.41 Mon Jan 22 19:19:49 CET 2007
317 - readline on Coro::Handle did not support undefined $/,
318 nor did it deliver partial lines on EOF or error.
319 - implement malloc fallback for stack allocation because
320 stupid broken idiotic OSX has a stupid broken
321 idiotic fits-the-whole-os mmap "implementation" and
322 my dick feels longer if Coro is portable even to
323 obsolete platforms.
324
3253.4 Fri Jan 19 21:52:54 CET 2007
326 - remove t/09_timer.t, as it isn't really testing much
327 but was rather flaky in practise.
328 - async_pool coro would keep arguments and callback alive until
329 it was reused.
330 - cancellation of a coroutine could cause spurious idle calls
331 in cede_notself.
332
3333.3 Sat Jan 6 03:45:00 CET 2007
334 - implement $coro->on_destroy.
335 - Coro::Event blocking semantics have been changed,
336 documented and - hopefully - improved.
337 - fix nice adding, not subtracting, from priority.
338 - fix ->prio and api_is_ready (patch by Mark Hinds).
339 - fixed an assert ("... == prev__cctx->idle_te")
340 that could errronously trigger.
341 - fix various large and small memleaks.
342 - use a (hopefully) more stable cancel implementation
343 that immediately frees the coroutine data.
344 - cede/cede_notself return a status now.
345 - added Coro::guard function.
346 - added a global coroutine pool for jobs (on my machine,
347 I can create and execute 48k simple coros/s with async,
348 and 128k coros with async_pool).
349 - Coro::AIO now uses the coroutine priority as io priority.
350
3513.2 Fri Dec 22 05:07:09 CET 2006
352 - improve portability to slightly older perls.
353 - use cleaner coroutine destruction.
354 - simplify configuration for users.
355 - optionally (unrecommended) prefer perl functions over
356 their coro replacements.
357
3583.11 Tue Dec 5 13:11:24 CET 2006
359 - fixed some bogus assert's, but as perl.h disables assert even
360 without NDEBUG (thank you very much), not too many people should
361 notice (that did include myself). Andreas König noticed, though :)
362 - do not save/restore PL_sortcxix on >= 5.9.x, it doesn't seem to have
363 it. Also noticed by Andreas König :)
364 - save/restore tainted status.
365 - verified to pass the testsuite on my 5.9.5.
366
3673.1 Mon Dec 4 23:03:40 CET 2006
368 - INCOMPATIBLE CHANGE: $/ is now per-coroutine (but slow).
369 - incompatible change: transfer flags are now per-state.
370 - give a better error message on deadlock.
371 - document Coro::nready.
372 - enhanced testsuite.
373
3743.01 Sun Dec 3 23:47:42 CET 2006
375 - forgot to include Coro::Timer.
376
3773.0 Sun Dec 3 22:57:25 CET 2006
378 - the "FINALLY COMPLETELY STABLE" release (coming soon:
379 the "FAMOUS LAST WORDS" release).
380 - implement a new stack sharing algorithm, which uses a stack
381 pool (size currently hardcoded).
382 - make stack sharing mandatory (it no longer uses a heuristic).
383 - eval/die no longer cause weird problems under heavy use.
384 - Coro::Event could cause livelocks if it was used but
385 no Coro::Event watchers were used.
386 - Coro::Event now uses asynccheck as prepare does not
387 check for changed watchers.
388 - Coro::Event allows multiple waiting coros and will wake up one
389 per event.
390 - Coro::Event should be cleaner and more efficient now.
391 - new utility function Coro::unblock_sub.
392 - document the sad fact that Event is no longer reentrant.
393 - putting a coroutine into the ready queue twice could under
394 some circumstances lead to stack corruption.
395 - minor incompatibility: subclassing Coro::State is supported
396 directly now without going through a _coro_state member.
397 - state/coro switching is much faster now.
398 - very minor optimisations and code/documentation cleanup.
399 - avoid problems due to compiler inlining.
400 - removed timers from Coro::Timer -> use AnyEvent instead.
401 - replaced Coro::idle coroutine by (cleaner) idle handler.
402 - updated to newest libcoro.
403 - implement enhanced support for valgrind.
404 - implement is_ready and return value for ready.
405 - removed Coro::Cont, it was a misnomer (it's generators),
406 and it was somewhat annoying to get it right. Will come back
407 if somebody asks for it :)
408 - many ->wait methods and Coro::Event could return
409 spuriously without the event having happened.
410
4112.5 Tue Nov 7 12:22:33 CET 2006
412 - made Coro::Util, Coro::Select, Coro::Handle and Coro::Socket
413 use AnyEvent, moved them to Coro/.
414 - added Coro::LWP which contains all the uglyness required to
415 make LWP non-blocking.
416 - should work with perl 5.9.x now (Andreas König made me do it).
417 - fixed another bug in Coro::Select when the timeout was undef.
418 - reuse PL_start_env for all coros, saves some memory per coroutine.
419 - manage PL_top_env differently, hopefully to avoid panic: top_env.
420 - timeout argument was not properly used in Coro::Socket.
421 - allow limited forms of subclassing in Coro::Handle/Coro::Socket.
422 - emulate undocumented(!) functionality of IO::Socket required
423 by LWP(!!).
424 - updated eg/lwp to work with newer lwp's.
425 - remove "FATAL: uncaught exception" prefix. Coroutines that die
426 kill the whole process, just as exceptions in the main "coroutine"
427 did already.
428
4292.1 Wed Nov 1 23:01:13 CET 2006
430 - fix a long-standing bug in Coro::Select where select with
431 zero timeout would instead change the current default filehandle.
432 - use a simpler and hopefully more robust way to clone padlists
433 (uses less memory and a perl function instead of our own).
434 - coro can now create a stack guard area on many architectures.
435 - Coro::AIO properly reexports additional functions from IO::AIO.
436 - updated libcoro with a workaround for OS X,
437 pach and testing by Michael Schwern.
438
4392.0 Tue Oct 24 05:47:17 CEST 2006
440 - support additional aio requests in Coro::AIO.
441
4421.9 (never properly released due to a glitch)
443
4441.8 Thu Feb 2 00:59:06 CET 2006
445 - applied suggested patch by SAMV to avoid problems during stupid
446 mark & sweep gc run.
447 - applied patch by Scott Walters for 5.9.3 compatibility.
448
4491.7 Tue Dec 27 01:41:58 CET 2005
450 - added Coro::AIO, a thin wrapper around IO::AIO.
451 - improved Makefile.PL explanations.
452
4531.6 Mon Dec 12 21:30:05 CET 2005
454 - additionally save PM_curpm might fix as-of-yet
455 unseen problems with regex matches being attributed to the
456 wrong package.
457 - add t/10_bugs.t, which currently checks against imho broken
458 perls that use 0.26MB of stack space per Perl_magic_get
459 invocation (newer linuxes) as opposed to the 0.0002MB perl
460 normally uses.
461 - make stacksize configurable for the ultimate debian experience.
462
4631.51 Mon Dec 12 18:48:36 CET 2005
464 - remove debugging warn() accidentally left in Coro::Select.
465
4661.5 Tue Nov 29 13:32:44 CET 2005
467 - use Coro::Event inside Coro::Select to avoid spurious deadlocks.
468 - fix Coro::Select 'select'.
469 - strict'ify some modules.
470 - libcoro errornously restored the SIGUSR2 handler to SIGUSR1.
471 - use XSLoader in selected modules.
472 - remove some 5.6 compatibility cruft.
473
4741.4 Tue Sep 6 00:11:05 CEST 2005
475 - libcoro did not take into account the trampoline on amd64,
476 when 'l'inux method was used.
477
4781.31 Tue Aug 30 23:31:33 CEST 2005
479 - some portability fixes/workarounds.
480
4811.3 Sat Aug 20 03:08:56 CEST 2005
482 - no code changes. module seems to work fine.
483 - improve Coro::State docs, remove reference to nonexisting
484 Coro::State::flush method.
485 - no longer autodetect windows, present it as an option instead.
486
4871.2 Mon May 16 02:00:55 CEST 2005
3 - included libcoro.c earlier in State.xs, might improve portability. 488 - included libcoro.c earlier in State.xs, might improve portability.
489 - use a faster and possibly more stable Coro::Cont implementation.
490 - accept x86_64 in addition to amd64 for optimized linux-amd64 support.
491 - fix bugs Coro::SemaphoreSet that could cause locks never to be freed.
492 - fix bugs in CoroAPI.h and document it in Coro::MakeMaker.
4 493
51.11 Thu Mar 3 18:00:52 CET 2005 4941.11 Thu Mar 3 18:00:52 CET 2005
6 - change of contact address. 495 - change of contact address.
7 496
81.1 Tue Feb 22 20:51:16 CET 2005 4971.1 Tue Feb 22 20:51:16 CET 2005
9 - support [l]inux method on amd64. 498 - support [l]inux method on amd64.
10 - make some context switches while compiling/eval'ing work. 499 - allow some context switches while compiling/eval'ing.
11 500
121.0 Tue Aug 10 03:47:27 CEST 2004 5011.0 Tue Aug 10 03:47:27 CEST 2004
13 - Event 0.89 fixes the bug again. 502 - Event 0.89 fixes the bug again.
14 - fix the remaining(??) memleak. I didn't free the cache-AV for 503 - fix the remaining(??) memleak. I didn't free the cache-AV for
15 padlists, so one AV per created anon-sub leaked. 504 padlists, so one AV per created anon-sub leaked.
16 505
170.97 Fri May 14 15:23:32 CEST 2004 5060.97 Fri May 14 15:23:32 CEST 2004
18 - remove stupid gcc extension that was an experiment only anyway. 507 - remove stupid gcc extension that was an experiment only anyway.
19 508
200.96 Thu May 13 18:09:29 CEST 2004 5090.96 Thu May 13 18:09:29 CEST 2004
21 - tell people if they have yet anothe rbroken Event variant. 510 - tell people if they have yet another broken Event variant.
22 - made Coro to work _better_ with threads (it seems that, as long 511 - made Coro to work _better_ with threads (it seems that, as long
23 as you use Coros in one thread only everything will work fine. 512 as you use Coros in one thread only everything will work fine.
24 Looking at the perl source the problem might be missing locking 513 Looking at the perl source the problem might be missing locking
25 between Coro and some perl internal routines. That's not easily 514 between Coro and some perl internal routines. That's not easily
26 fixable). 515 fixable).

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