Error generating resolvers for federated schema with interface fields in @key

[carldunham]

What happened?

Attempting to use a field from an interface in @key results in a SIGSEGV during code gen.

What did you expect?

Proper code gen.

Minimal graphql.schema and models to reproduce

See the simple schema change at carldunham@3379526.

extend type Query {
    topProducts(first: Int = 5): [Product]
}

interface Producter {
    id: String!
}

type Manufacturer implements Producter @key(fields: "id") {
    id: String!
    name: String!
}

type Product @key(fields: "manufacturer { id } id") @key(fields: "upc") {
    id: String!
    manufacturer: Producter!
    upc: String!
    name: String!
    price: Int!
}

Run go generate ./...

See the error:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x30 pc=0x10090daf0]

goroutine 1 [running]:
github.com/99designs/gqlgen/plugin/federation/fieldset.fieldByName(0x1009d2902?, {0x140001f40f6, 0x2})
        /Users/carl.dunham/src/gqlgen/plugin/federation/fieldset/fieldset.go:177 +0x20
github.com/99designs/gqlgen/plugin/federation/fieldset.Field.TypeReference({0x14000132ec0, 0x2, 0x140001f40d1?}, 0x3?, {0x140003bec00, 0xb, 0x14000d796a8?})
        /Users/carl.dunham/src/gqlgen/plugin/federation/fieldset/fieldset.go:78 +0x80
github.com/99designs/gqlgen/plugin/federation.(*federation).GenerateCode(0x1400007da70, 0x140000ee0b0)
        /Users/carl.dunham/src/gqlgen/plugin/federation/federation.go:308 +0x1048
github.com/99designs/gqlgen/api.Generate(0x14000151448, {0x0, 0x0, 0x0?})
        /Users/carl.dunham/src/gqlgen/api/generate.go:111 +0x9d4
main.main()
        /Users/carl.dunham/src/gqlgen/testdata/gqlgen.go:43 +0x2d8
exit status 2
federation/products/server.go:1: running "go": exit status 1

versions

• go run github.com/99designs/gqlgen version? v0.17.45-dev
• go version? go version go1.22.1 darwin/arm64