crash during "make unittests"

[fceller]

Sometimes there is a crash at the end of the "unittests-http-server":

Core was generated by `./bin/arangod /tmp/vocdir.3707 --javascript.startup-directory ./js --javascript'.
Program terminated with signal 11, Segmentation fault.
#0 0x000000000055ccfb in v8::internal::FixedArray::get(int) ()

(gdb) info threads
25 Thread 4019 0x00007fc28ce6dd53 in epoll_wait () at ../sysdeps/unix/syscall-template.S:82
24 Thread 4020 0x00007fc28ce6dd53 in epoll_wait () at ../sysdeps/unix/syscall-template.S:82
23 Thread 4017 0x00007fc28ce3c98d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
22 Thread 4016 0x00007fc28ce3c98d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
21 Thread 4025 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc2837fc7d0) at dl-iteratephdr.c:36
20 Thread 4037 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
19 Thread 4021 0x00007fc28ce6dd53 in epoll_wait () at ../sysdeps/unix/syscall-template.S:82
18 Thread 4034 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
17 Thread 4028 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc281ff9a50) at dl-iteratephdr.c:36
16 Thread 4038 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:86
15 Thread 4032 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
14 Thread 4036 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
13 Thread 4018 0x00007fc28ce3c98d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
12 Thread 4029 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc2817f8a90) at dl-iteratephdr.c:36
11 Thread 4023 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc288973dd0) at dl-iteratephdr.c:36
10 Thread 4026 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc282ffb810) at dl-iteratephdr.c:36
9 Thread 4010 0x00007fc28ce3c98d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
8 Thread 4015 0x00007fc28ce3c98d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
7 Thread 4027 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc2827fa910) at dl-iteratephdr.c:36
6 Thread 4031 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
5 Thread 4024 __dl_iterate_phdr (callback=0x7fc28d3350d0, data=0x7fc283ffdf10) at dl-iteratephdr.c:36
4 Thread 4030 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
3 Thread 4033 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
2 Thread 4035 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162

• 1 Thread 4022 0x000000000055ccfb in v8::internal::FixedArray::get(int) ()

This happens in thread 1 during the GC of a cursor
#0 0x000000000055ccfb in v8::internal::FixedArray::get(int) ()
#1 0x000000000055ae63 in v8::internal::Context::global() ()
#2 0x00000000006ad9be in v8::internal::Isolate::global_context() ()
#3 0x0000000000581479 in v8::Context::GetCurrent() ()
#4 0x000000000046a93c in GetContextVocBase (object=, parameter=0x7fc2840ad3b0) at arangod/V8Server/v8-vocbase.cpp:157
#5 WeakGeneralCursorCallback (object=, parameter=0x7fc2840ad3b0) at arangod/V8Server/v8-vocbase.cpp:1120
#6 0x000000000060e24a in v8::internal::GlobalHandles::Node::PostGarbageCollectionProcessing(v8::internal::Isolate_, v8::internal::GlobalHandles_) ()
#7 0x000000000060f04f in v8::internal::GlobalHandles::PostGarbageCollectionProcessing(v8::internal::GarbageCollector) ()
#8 0x000000000062a161 in v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::internal::GCTracer*) ()
#9 0x00000000006292d6 in v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollector, char const_, char const_) ()
#10 0x00000000005e0d4e in v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, char const*) ()
#11 0x0000000000628fd5 in v8::internal::Heap::CollectAllGarbage(int, char const*) ()
#12 0x00000000006353ec in v8::internal::Heap::IdleGlobalGC() ()
#13 0x0000000000634f38 in v8::internal::Heap::IdleNotification(int) ()
#14 0x000000000080923a in v8::internal::V8::IdleNotification(int) ()
#15 0x0000000000580186 in v8::V8::IdleNotification(int) ()
#16 0x000000000045159a in triagens::arango::JavascriptDispatcherThread::run (this=0xe7b390) at arangod/RestServer/JavascriptDispatcherThread.cpp:168
#17 0x0000000000509605 in triagens::basics::Thread::runMe (this=0xe7b390) at lib/Basics/Thread.cpp:280
#18 0x0000000000509a79 in triagens::basics::Thread::startThread (arg=) at lib/Basics/Thread.cpp:55
#19 0x000000000051aa80 in ThreadStarter (data=0xe8c2b0) at lib/BasicsC/threads-posix.c:93
#20 0x00007fc28d10da3f in start_thread (arg=0x7fc289176700) at pthread_create.c:297
#21 0x00007fc28ce6d71d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#22 0x0000000000000000 in ?? ()

[fceller]

Fixed in a7d0ac6