CustomSectionsPresenceMismatch - Error on adding parachain

[Douglasacost]

Hello. While adding a parachain chainSpec (e.x: Nodle parachain) to smoldot client versions from v1.0.3 to v1.0.6, the following error is logged and the client get stoped

[smoldot] Smoldot v1.0.6 rococo_:: init [smoldot] Chain initialization complete for rococo_v2_2. Name: "Rococo". Genesis hash: 0x6408…063e. State root hash: 0x8ad9dafeef04674f627ec2112f2206ed271b7270da5143fd11a943872c19f0da. Network identity: 12D3KooWMZPvLihSBdaenqyvHyQS5fqgnxGuWmNSxnhq3cTZfKGL. Chain specification or database starting at: 0xd5e1…d2b7 (#5137882) /Users/douglasacosta/nodle/smoldot-play/node_modules/smoldot/dist/cjs/internals/client.js:8 function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } ^ AddChainError: Failed to build genesis chain information: Error when initializing the virtual machine: Error in runtime spec Wasm sections: CustomSectionsPresenceMismatch at /Users/douglasacosta/nodle/smoldot-play/node_modules/smoldot/dist/cjs/internals/client.js:282:23 at Generator.next (<anonymous>) at fulfilled (/Users/douglasacosta/nodle/smoldot-play/node_modules/smoldot/dist/cjs/internals/client.js:8:58)

While on the browser with the version of smoldot client v1.0.2 I got this error below

Chain info:
parachain chainspec: https://github.com/NodleCode/chain/blob/2.0.30/node/res/eden-testing.json
relay: rococo_v2_2
Platform:
Smoldot version: v1.0.3 - v1.0.6
Node version: v16.15.0
Processor: M1

[tomaka]

I've opened paritytech/substrate#14223

Basically, there are two ways to determine the version of a runtime, the legacy way and the newer way. Your runtime is in a weird in-between state, and smoldot doesn't really know this should be handled so it returns an error.
Assuming that my diagnostic is correct, this is a Substrate bug.
I can easily add a work-around in smoldot, but I'd like to confirm that this is the case based on the comments on that Substrate issue first.

[tomaka]

NodleCode/chain#749 should fix it for your chain. Since your genesis runtime and that the Rococo genesis runtime are affected, I'll need to add a work-around anyway.

[tomaka]

#607 adds a work-around for the problem, and it should now work.