http://d.puremagic.com/issues/show_bug.cgi?id=8774

           Summary: 2.059 worked 2.060 does not: Unable to join thread
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: regression
          Priority: P2
         Component: druntime
        AssignedTo: nobody@puremagic.com
        ReportedBy: russel@winder.org.uk


--- Comment #0 from Russel Winder <russel@winder.org.uk> 2012-10-07 04:22:54 PDT ---
The attached code compiles and runs fine under DMD 2.059 installed on Debian Unstable via the distributed deb file. Under 2.060 it compiles but at runtime gives:

core.thread.ThreadException@src/core/thread.d(780): Unable to join thread
----------------
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(void
pi_d_threadsGlobalState_array_declarative.execute(immutable(int))+0x129)
[0x44dac5]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(_Dmain+0x28)
[0x44db8c]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(extern
(C) int rt.dmain2.main(int, char**).void runMain()+0x1c) [0x45b34c]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(extern
(C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a)
[0x45acc6]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(extern
(C) int rt.dmain2.main(int, char**).void runAll()+0x3b) [0x45b393]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(extern
(C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a)
[0x45acc6]
/tmp/.rdmd-1000/rdmd-pi_d_threadsGlobalState_array_declarative.d-C963C499401209E276E9BB7F98EEB447/pi_d_threadsGlobalState_array_declarative(main+0xd1)
[0x45ac51]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fe18bb3aead]

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--- Comment #1 from Russel Winder <russel@winder.org.uk> 2012-10-07 04:24:24 PDT ---
Created an attachment (id=1146)
.

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Russel Winder <russel@winder.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #1146|.                           |pi_d_threadsGlobalState_arr
        description|                            |ay_declarative.d


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Alex Rønne Petersen <alex@lycus.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alex@lycus.org


--- Comment #2 from Alex Rønne Petersen <alex@lycus.org> 2012-10-07 13:56:30 CEST ---
pi_d_threadsGlobalState_array_declarative.d(13): Error: module output_d is in
file 'output_d.d' which cannot be read
import path[0] = .
import path[1] = /usr/include/dmd/phobos
import path[2] = /usr/include/dmd/druntime/import
Failed: 'dmd' '-v' '-o-' 'pi_d_threadsGlobalState_array_declarative.d' '-I.'

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--- Comment #3 from Russel Winder <russel@winder.org.uk> 2012-10-07 05:00:53 PDT ---
Created an attachment (id=1148)
output_d.d

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--- Comment #4 from Alex Rønne Petersen <alex@lycus.org> 2012-10-07 14:19:57 CEST ---
What's happening is that pthread_join() is giving us ESRCH because the thread handle is apparently no longer valid.

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--- Comment #5 from Alex Rønne Petersen <alex@lycus.org> 2012-10-07 15:11:18 CEST ---
Something is very wrong here and I'm not sure whether to blame the compiler or Phobos:

starting 0 7FCE6E0B3E00
joining 0 7FCE6E0B3D00

First value is the thread number, second is its address. Notice how the address it attempts to join with is very wrong.

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--- Comment #6 from Russel Winder <russel@winder.org.uk> 2012-10-07 07:44:02 PDT ---
Perhaps worth noting that using ldc2 compiled from the Git repository gives effectively the same result.

core.thread.ThreadException@/home/Checkouts/Git/Git/LDC/runtime/druntime/src/core/thread.d(788): Unable to join thread

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luka8088 <luka8088@owave.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luka8088@owave.net


--- Comment #7 from luka8088 <luka8088@owave.net> 2012-10-19 00:32:12 PDT ---
*** Issue 8852 has been marked as a duplicate of this issue. ***

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--- Comment #8 from luka8088 <luka8088@owave.net> 2012-10-19 00:33:58 PDT ---
Here is a simple test case:

-----

module program;

import std.stdio;
import core.thread;

void main () {

  Thread t1, t2;

  t1 = new Thread(delegate { t2.start(); });
  t2 = new Thread(delegate { Thread.sleep(dur!"seconds"(1)); });

  t1.start();
  t2.join();

}

-----

http://dpaste.dzfl.pl/0d24dd06

output:
  core.thread.ThreadException@src/core/thread.d(780): Unable to join thread

if t2.join occurs after t2 already finished then exception is not thrown, hence the sleep

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