$ out/Debug/node --experimental-shadow-realm --max-old-space-size=20 /Users/mzasso/git/nodejs/node/test/parallel/test-shadow-realm-gc-module.js
<--- Last few GCs --->
[61276:0x148008000] 3114 ms: Scavenge 17.0 (20.1) -> 16.4 (25.1) MB, 1.33 / 0.00 ms (average mu = 0.889, current mu = 0.757) allocation failure;
[61276:0x148008000] 3147 ms: Mark-Compact 20.8 (25.8) -> 18.0 (28.6) MB, 11.12 / 0.00 ms (+ 0.7 ms in 0 steps since start of marking, biggest step 0.0 ms, walltime since start of marking 39 ms) (average mu = 0.867, current mu = 0.858) allocation fail
<--- JS stacktrace --->
FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
----- Native stack trace -----
1: 0x1026d59c8 node::DumpNativeBacktrace(__sFILE*) [/Users/mzasso/git/nodejs/node/out/Debug/node]
2: 0x102814ef4 node::Abort() [/Users/mzasso/git/nodejs/node/out/Debug/node]
3: 0x1028151d8 node::ModifyCodeGenerationFromStrings(v8::Local<v8::Context>, v8::Local<v8::Value>, bool) [/Users/mzasso/git/nodejs/node/out/Debug/node]
4: 0x102b9f8f0 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [/Users/mzasso/git/nodejs/node/out/Debug/node]
5: 0x1030362f8 v8::internal::Heap::stack() [/Users/mzasso/git/nodejs/node/out/Debug/node]
6: 0x1030341d4 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/mzasso/git/nodejs/node/out/Debug/node]
...
79: 0x1042501c4 main [/Users/mzasso/git/nodejs/node/out/Debug/node]
80: 0x18157d0e0 start [/usr/lib/dyld]
[1] 61276 abort out/Debug/node --experimental-shadow-realm --max-old-space-size=20