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Showing content from https://github.com/nodejs/node/issues/44014 below:

This issue is opened to track known bugs and limitations of the run-time user-land snapshot.

Currently known limitations/bugs in Node.js builtins:

Support modules that generate system requests e.g. net, http (without supporting the snapshotting of those requests, which we can't resurrect. But user should be able to snapshot the application after all pending requests are completed).
Certain global event listeners on the process object need to be removed during snapshot serialization, and re-installed during deserialization
Support user-land modules
Integration with SEA (Single Executable Application): src,doc: Experimental support for SEA #42334
Support of more embedder objects and bindings: Support Node.js embedder objects and bindings in the snapshot #37476
Support diagnostics channels: src: support WeakReference, diagnostics_channel and net in the snapshot #44193
Support vm contexts
Support workers

Currently known limitations/bugs that are being fixed in the V8 upstream:

V8 hits a DCHECK when deserializing certain mutated globals, e.g. Error.stackTraceLimit (it should work fine in the release build, however): https://bugs.chromium.org/p/v8/issues/detail?id=12772 (fix in https://chromium-review.googlesource.com/c/v8/v8/+/3319481) (switch to bootstrap: fixup Error.stackTraceLimit for user-land snapshot #44203)
Layout of V8's read-only heap can be inconsistent after deserialization, resulting in memory corruption: snapshot cause EXC_BAD_ACCESS #40832 & https://bugs.chromium.org/p/v8/issues/detail?id=12921 (fixed)

legendecas, benjamingr, SimonSiefke and styflelue-bird

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