✓ Using Herb config file at .herb.yml

<--- Last few GCs --->

[307186:0x33677c60]    42409 ms: Mark-Compact 4011.5 (4136.3) -> 4003.3 (4142.3) MB, 862.13 / 0.00 ms  (average mu = 0.336, current mu = 0.012) allocation failure; scavenge might not succeed
[307186:0x33677c60]    44020 ms: Mark-Compact 4019.4 (4142.6) -> 4011.1 (4150.6) MB, 1598.40 / 0.00 ms  (average mu = 0.154, current mu = 0.008) allocation failure; scavenge might not succeed


<--- JS stacktrace --->

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
----- Native stack trace -----

 1: 0xc8610c node::Abort() [node]
 2: 0xb754bc void node::FPrintF<>(_IO_FILE*, char const*) [node]
 3: 0xe83f6c v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [node]
 4: 0xe8413c v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [node]
 5: 0x108be4c  [node]
 6: 0x10a2324 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [node]
 7: 0x107b08c v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [node]
 8: 0x107be50 v8::internal::HeapAllocator::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [node]
 9: 0x105bb8c v8::internal::Factory::NewFillerObject(int, v8::internal::AllocationAlignment, v8::internal::AllocationType, v8::internal::AllocationOrigin) [node]
10: 0x146c934 v8::internal::Runtime_AllocateInYoungGeneration(int, unsigned long*, v8::internal::Isolate*) [node]
11: 0x186da84  [node]
Aborted```

I'm not sure what information I might provide could help diagnose this, but of course happy to help provide more information as needed.