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Turbopack Build Fails Fatally On Node-Pre-Gyp Packages Without Napi_versions (E.G. Duckdb)

Next.js Turbopack build crashes with TurbopackInternalError when tracing native modules whose node-pre-gyp binary config omits the optional napi_versions field. The Rust serde struct marks napi_versions as required, causing fatal deserialization errors for valid packages like duckdb.

highConfidence 95%Next.js Affected V16.1.6 Affected V16.3.1-Canary.25 Affected V16.4.0-Canary.8

Origin Analysis

In turbopack/crates/turbopack-resolve/src/node_native_binding.rs, NodePreGypConfig derives Deserialize with napi_versions: Vec<u32> lacking #[serde(default)]. node-pre-gyp's binary config treats napi_versions as optional; its absence is valid but serde rejects the missing field, surfacing a fatal TurbopackInternalError instead of parsing the config.

1. Create a minimal Next.js app with next@canary. 2. Add dependency duckdb and import it in a server route. 3. Run npx next build. The build aborts with missing field `napi_versions` in TurbopackInternalError. The same build succeeds with --webpack.

Fixing Code Block

0x7F 45 4C 46 02 01 01 000x90 12 AB 04 C1 7E 33 08
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0x00 00 00 00 03 00 3E 000x01 00 B7 4D 55 90 0C 61
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0xDE C0 DE 01 8B 45 FC 890xC7 5D 20 6F 91 03 E4 78
0x13 37 00 4F 9A 2D E1 700x08 B4 5C 22 71 D0 4A 16
0x48 8D 3D 22 01 00 00 E80x91 FF 0A 63 2E 57 B8 04
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0xFF 15 40 20 60 00 48 890xC3 90 7A 01 4C 28 B1 56
0x0F 1F 44 00 00 55 48 890xE5 C3 18 6D 92 0B 33 A7

Edge Case Audit

If a package omits napi_versions but module_path contains the {napi_build_version} token, the output path will contain the literal token and binary tracing may fail; add a warning if the resolved path does not exist or the token remains. Rolling back this patch will reintroduce the fatal crash for valid configs; instead, consider capturing a scoped, non-fatal diagnostic if issues arise. Ensure tests cover both empty and non-empty napi_versions, including multiple versions and path templates.