Description from the reporter:
"Those crashes occur from JDK7u7 via JDK7u9 to JDK7u10 dev builds, which I'm using during regular work with NetBeans IDE. They do not have steps to reproduce (most of the time ordinary development work in IDE), I'd say that each crash happened after very different set of actions. Sometimes JVM crashes even when IDE is idle"

Most of the logs looks like:
Thread 6 Crashed:
0 libsystem_kernel.dylib 0x00007fff92232212 __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff92f5daf4 pthread_kill + 90
2 libsystem_c.dylib 0x00007fff92fa1dce abort + 143
3 libjvm.dylib 0x0000000110129073 os::abort(bool) + 25
4 libjvm.dylib 0x000000011021782e VMError::report_and_die() + 2306
5 libjvm.dylib 0x000000011012a767 JVM_handle_bsd_signal + 1073
6 libsystem_c.dylib 0x00007fff92f4a8ea _sigtramp + 26
7 libjvm.dylib 0x000000010fef0238 Klass::layout_helper() const + 4
8 libjvm.dylib 0x000000010fef0947 oopDesc::size_given_klass(Klass*) + 27
9 libjvm.dylib 0x000000011015fbe5 oopDesc* PSPromotionManager::copy_to_survivor_space<false>(oopDesc*) + 53
10 libjvm.dylib 0x000000011016271f void PSRootsClosure<false>::do_oop_work<oopDesc*>(oopDesc**) + 103
11 libjvm.dylib 0x00000001100a8cd1 LoaderConstraintTable::oops_do(OopClosure*) + 103
12 libjvm.dylib 0x00000001101beb60 SystemDictionary::oops_do(OopClosure*) + 110
13 libjvm.dylib 0x0000000110162015 ScavengeRootsTask::do_it(GCTaskManager*, unsigned int) + 253
14 libjvm.dylib 0x000000010ff97772 GCTaskThread::run() + 406
15 libjvm.dylib 0x0000000110129595 java_start(Thread*) + 173
16 libsystem_c.dylib 0x00007fff92f5c742 _pthread_start + 327
17 libsystem_c.dylib 0x00007fff92f49181 thread_start + 13


Or:
Thread 53 Crashed:
0 libjvm.dylib 0x0000000103d94b60 VMError::report_and_die() + 20
1 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
2 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
3 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
4 libsystem_c.dylib 0x00007fff96125dff abort + 192
5 libjvm.dylib 0x0000000103ca6c51 os::die() + 9
6 libjvm.dylib 0x0000000103d94dde VMError::report_and_die() + 658
7 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
8 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
9 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
10 libsystem_c.dylib 0x00007fff96125dff abort + 192
11 libjvm.dylib 0x0000000103ca6c51 os::die() + 9
12 libjvm.dylib 0x0000000103d94dde VMError::report_and_die() + 658
13 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
14 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
15 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
16 libsystem_c.dylib 0x00007fff96125dff abort + 192
17 libjvm.dylib 0x0000000103ca6c51 os::die() + 9
18 libjvm.dylib 0x0000000103d94dde VMError::report_and_die() + 658
19 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
20 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
21 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
22 libsystem_c.dylib 0x00007fff96125dff abort + 192
23 libjvm.dylib 0x0000000103ca6c51 os::die() + 9
24 libjvm.dylib 0x0000000103d94dde VMError::report_and_die() + 658
25 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
26 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
27 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
28 libsystem_c.dylib 0x00007fff96125dff abort + 192
29 libjvm.dylib 0x0000000103ca6c51 os::die() + 9
30 libjvm.dylib 0x0000000103d94dde VMError::report_and_die() + 658
31 libjvm.dylib 0x0000000103ca8387 JVM_handle_bsd_signal + 1073
32 libsystem_c.dylib 0x00007fff960ce8ea _sigtramp + 26
33 libsystem_c.dylib 0x00007fff96125ee5 __abort + 230
34 libsystem_c.dylib 0x00007fff96125dff abort + 192
35 libjvm.dylib 0x0000000103ca6c51 os::die() + 9