Segmentation fault during garbage collection after process.exit

[JCMais]

* thread #1: tid = 48586, 0x0000000000a7c690 node`v8::Context::GetIsolate(), name = 'node', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)
  * frame #0: 0x0000000000a7c690 node`v8::Context::GetIsolate()
    frame #1: node_libcurl.node`NodeLibcurl::AdjustMemory(diff=-12) at Curl.cc:1114
    frame #2: node_libcurl.node`NodeLibcurl::FreeCallback(void*) at Curl.cc:1174
    frame #3: node_libcurl.node`NodeLibcurl::FreeCallback(p=0x00000000023fece8)
    frame #4: 0x00007ffff4558a59 node_libcurl.node`curl_formfree + 57
    frame #5: node_libcurl.node`NodeLibcurl::CurlHttpPost::Reset(this=0x00000000024172d0) at CurlHttpPost.cc:39
    frame #6: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] std::default_delete<NodeLibcurl::CurlHttpPost>::operator(this=<unavailable>, __ptr=0x00000000024172d0)(NodeLibcurl::CurlHttpPost*) const at unique_ptr.h:78
    frame #7: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() at unique_ptr.h:268
    frame #8: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] void std::_Destroy<std::unique_ptr<NodeLibcurl::CurlHttpPost, std::default_delete<NodeLibcurl::CurlHttpPost> > >(__pointer=<unavailable>) at stl_construct.h:98
    frame #9: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] void std::_Destroy_aux<false>::__destroy<std::unique_ptr<NodeLibcurl::CurlHttpPost, std::default_delete<NodeLibcurl::CurlHttpPost> >*>(__last=<unavailable>, __first=0x00000000024177a0) at stl_construct.h:108
    frame #10: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() at stl_construct.h:137
    frame #11: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] void std::_Destroy<std::unique_ptr<NodeLibcurl::CurlHttpPost, std::default_delete<NodeLibcurl::CurlHttpPost> >*, std::unique_ptr<NodeLibcurl::CurlHttpPost, std::default_delete<NodeLibcurl::CurlHttpPost> > >((null)=<unavailable>, __last=0x00000000024177a8, __first=<unavailable>) at stl_construct.h:206
    frame #12: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] _ZNSt6vectorISt10unique_ptrIN11NodeLibcurl12CurlHttpPostESt14default_deleteIS2_EESaIS5_EED4Ev(this=0x00007fffdc001630) at stl_vector.h:434
    frame #13: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] _ZN11NodeLibcurl4Easy6ToFreeD4Ev(this=0x00007fffdc001600) at Easy.cc:47
    frame #14: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] void __gnu_cxx::new_allocator<NodeLibcurl::Easy::ToFree>::destroy<NodeLibcurl::Easy::ToFree>(this=<unavailable>, __p=0x00007fffdc001600) at new_allocator.h:140
    frame #15: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() [inlined] void std::allocator_traits<std::allocator<NodeLibcurl::Easy::ToFree> >::destroy<NodeLibcurl::Easy::ToFree>(__a=<unavailable>, __p=0x00007fffdc001600) at alloc_traits.h:487
    frame #16: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() at shared_ptr_base.h:1310
    frame #17: node_libcurl.node`std::_Sp_counted_deleter<NodeLibcurl::Easy::ToFree*, std::__shared_ptr<NodeLibcurl::Easy::ToFree, (__gnu_cxx::_Lock_policy)2>::_Deleter<std::allocator<NodeLibcurl::Easy::ToFree> >, std::allocator<NodeLibcurl::Easy::ToFree>, (__gnu_cxx::_Lock_policy)2>::_M_dispose(this=<unavailable>) at shared_ptr_base.h:470
    frame #18: node_libcurl.node`NodeLibcurl::Easy::~Easy() [inlined] std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release(this=0x0000000002417090) at shared_ptr_base.h:154
    frame #19: node_libcurl.node`NodeLibcurl::Easy::~Easy() [inlined] std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release(this=0x0000000002417090)
    frame #20: node_libcurl.node`NodeLibcurl::Easy::~Easy() [inlined] _ZNSt14__shared_countILN9__gnu_cxx12_Lock_policyE2EED4Ev(this=0x0000000002417828) at shared_ptr_base.h:684
    frame #21: node_libcurl.node`NodeLibcurl::Easy::~Easy() [inlined] _ZNSt12__shared_ptrIN11NodeLibcurl4Easy6ToFreeELN9__gnu_cxx12_Lock_policyE2EED4Ev(this=0x0000000002417820) at shared_ptr_base.h:1123
    frame #22: node_libcurl.node`NodeLibcurl::Easy::~Easy() [inlined] _ZNSt10shared_ptrIN11NodeLibcurl4Easy6ToFreeEED4Ev(this=0x0000000002417820) at shared_ptr.h:93
    frame #23: node_libcurl.node`NodeLibcurl::Easy::~Easy(this=0x00000000024177c0) at Easy.cc:122
    frame #24: node_libcurl.node`NodeLibcurl::Easy::~Easy(this=0x00000000024177c0) at Easy.cc:128
    frame #25: 0x0000000000ddc82e node`v8::internal::GlobalHandles::DispatchPendingPhantomCallbacks(bool) + 238
    frame #26: 0x0000000000ddca9a node`v8::internal::GlobalHandles::PostGarbageCollectionProcessing(v8::internal::GarbageCollector, v8::GCCallbackFlags) + 42
    frame #27: 0x0000000000e0bb87 node`v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::GCCallbackFlags) + 567
    frame #28: 0x0000000000e0c9ce node`v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) + 798
    frame #29: 0x0000000000db07e2 node`v8::internal::Factory::NewFillerObject(int, bool, v8::internal::AllocationSpace) + 82
    frame #30: 0x000000000102a8c0 node`v8::internal::Runtime_AllocateInNewSpace(int, v8::internal::Object**, v8::internal::Isolate*) + 96
    frame #31: 0x00002ea133d042fd <exit>
    frame #32: 0x00002ea133e05c4b <stub>
    frame #33: 0x00002ea133dbedb6 lookupAndListen(this=0x27c2211822d1:<undefined>, 0x20697cd033e1:<Object: Server>, <Smi: 3443>, 0x5794c94f119:<String: "localhost">, 0x27c2211823e1:<false>, 0x27c2211822d1:<undefined>) at net.js:1504:25 fn=0x00001d98be96c4b1
    frame #34: 0x00002ea133dbedb6 Server.listen(this=0x20697cd033e1:<Object: Server>) at net.js:1433:35 fn=0x00001d9180d4d479
    frame #35: 0x00002ea133d0535f <adaptor>
    frame #36: 0x00002ea133dbedb6 (anonymous)(this=0x20697cd03639:<Object: Context>, 0x20697cd035f1:<function: (anonymous) at /home/jcm/node-libcurl/node_modules/mocha/lib/runnable.js:400:39>) at /home/jcm/node-libcurl/test/curl/ssl.js:28:16 fn=0x000020697cd03571
    frame #37: 0x00002ea133dbedb6 callFnAsync(this=0x27c2211822d1:<undefined>, 0x20697cd03571:<function: (anonymous) at /home/jcm/node-libcurl/test/curl/ssl.js:28:16>) at /home/jcm/node-libcurl/node_modules/mocha/lib/runnable.js:399:23 fn=0x000020697cd03711
    frame #38: 0x00002ea133dbedb6 Runnable.run(this=0x20697cd03821:<Object: Hook>, 0x20697cd037d9:<function: (anonymous) at /home/jcm/node-libcurl/node_modules/mocha/lib/runner.js:317:22>) at /home/jcm/node-libcurl/node_modules/mocha/lib/runnable.js:275:34 fn=0x0000203bd3628961
    frame #39: 0x00002ea133dbedb6 next(this=0x27c2211822d1:<undefined>, <Smi: 0>) at /home/jcm/node-libcurl/node_modules/mocha/lib/runner.js:300:16 fn=0x000020697cd03929
    frame #40: 0x00002ea133dbedb6 (anonymous)(this=0x20697cd039f9:<Object: Immediate>) at /home/jcm/node-libcurl/node_modules/mocha/lib/runner.js:346:30 fn=0x000020697cd039b1
    frame #41: 0x00002ea133dbedb6 runCallback(this=0x27c2211822d1:<undefined>, 0x20697cd039f9:<Object: Immediate>) at timers.js:98:18 fn=0x00001d9180d1e6b9
    frame #42: 0x00002ea133dbedb6 tryOnImmediate(this=0x27c2211822d1:<undefined>, 0x20697cd039f9:<Object: Immediate>, 0x20697cd039f9:<Object: Immediate>) at timers.js:98:18 fn=0x00001d9180d1e671
    frame #43: 0x00002ea133dbedb6 processImmediate(this=0x7bf9c009cf9:<Object: process>) at timers.js:98:18 fn=0x00001d9180d1e629
    frame #44: 0x00002ea133d04239 <internal>
    frame #45: 0x00002ea133d04101 <entry>
    frame #46: 0x0000000000da611a node`v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*) + 266
    frame #47: 0x0000000000a78b43 node`v8::Function::Call(v8::Local<v8::Context>, v8::Local<v8::Value>, int, v8::Local<v8::Value>*) + 355
    frame #48: 0x00000000008cf861 node`node::InternalMakeCallback(node::Environment*, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context) + 177
    frame #49: 0x00000000008cfb93 node`node::MakeCallback(v8::Isolate*, v8::Local<v8::Object>, v8::Local<v8::String>, int, v8::Local<v8::Value>*, node::async_context) + 163
    frame #50: 0x00000000008bca6f node`node::Environment::CheckImmediate(uv_check_s*) + 111
    frame #51: node`uv__run_check(loop=0x0000000002184aa0) at loop-watcher.c:67
    frame #52: node`uv_run(loop=0x0000000002184aa0, mode=UV_RUN_DEFAULT) at core.c:371
    frame #53: 0x00000000008d6665 node`node::Start(uv_loop_s*, int, char const* const*, int, char const* const*) + 1205
    frame #54: 0x00000000008d59c0 node`node::Start(int, char**) + 352
    frame #55: libc.so.6`__libc_start_main(main=(node`main), argc=7, argv=0x00007fffffffde68, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=0x00007fffffffde58) at libc-start.c:310
    frame #56: 0x000000000089f101 node`_start + 41

Caused by not checking if current context is dead on Curl::AdjustMemory