Self referencing data classes can't be serialized

[thake]

The following self referencing data class leads to a stack overflow when trying to determine the schema for the associatedProduct field:
@Serializable data class Product(val id: String, val associatedProduct: Product?)

java.lang.StackOverflowError
at kotlin.text.StringsKt__StringsKt.findAnyOf$StringsKt__StringsKt(Strings.kt:897)
at kotlin.text.StringsKt__StringsKt.access$findAnyOf(Strings.kt:1)
at kotlin.text.StringsKt__StringsKt$rangesDelimitedBy$4.invoke(Strings.kt:1170)
at kotlin.text.StringsKt__StringsKt$rangesDelimitedBy$4.invoke(Strings.kt)
at kotlin.text.DelimitedRangesSequence$iterator$1.calcNext(Strings.kt:1098)
at kotlin.text.DelimitedRangesSequence$iterator$1.hasNext(Strings.kt:1127)
at kotlin.sequences.TransformingSequence$iterator$1.hasNext(Sequences.kt:176)
at kotlin.sequences.SequencesKt___SequencesKt.joinTo(_Sequences.kt:1882)
at kotlin.sequences.SequencesKt___SequencesKt.joinToString(_Sequences.kt:1904)
at kotlin.sequences.SequencesKt___SequencesKt.joinToString$default(_Sequences.kt:1903)
at kotlin.text.StringsKt__StringsJVMKt.replace(StringsJVM.kt:76)
at kotlin.text.StringsKt__StringsJVMKt.replace$default(StringsJVM.kt:75)
at com.sksamuel.avro4k.RecordNaming.(RecordNaming.kt:22)
at com.sksamuel.avro4k.RecordNaming$Companion.invoke(RecordNaming.kt:13)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:50)
at com.sksamuel.avro4k.schema.ClassSchemaFor.dataClassSchema(ClassSchemaFor.kt:37)
at com.sksamuel.avro4k.schema.ClassSchemaFor.schema(ClassSchemaFor.kt:25)
at com.sksamuel.avro4k.schema.NullableSchemaFor.schema(SchemaFor.kt:124)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:52)
at com.sksamuel.avro4k.schema.ClassSchemaFor.dataClassSchema(ClassSchemaFor.kt:37)
at com.sksamuel.avro4k.schema.ClassSchemaFor.schema(ClassSchemaFor.kt:25)
at com.sksamuel.avro4k.schema.NullableSchemaFor.schema(SchemaFor.kt:124)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:52)
at com.sksamuel.avro4k.schema.ClassSchemaFor.dataClassSchema(ClassSchemaFor.kt:37)
at com.sksamuel.avro4k.schema.ClassSchemaFor.schema(ClassSchemaFor.kt:25)
at com.sksamuel.avro4k.schema.NullableSchemaFor.schema(SchemaFor.kt:124)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:52)
at com.sksamuel.avro4k.schema.ClassSchemaFor.dataClassSchema(ClassSchemaFor.kt:37)
at com.sksamuel.avro4k.schema.ClassSchemaFor.schema(ClassSchemaFor.kt:25)
at com.sksamuel.avro4k.schema.NullableSchemaFor.schema(SchemaFor.kt:124)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:52)
at com.sksamuel.avro4k.schema.ClassSchemaFor.dataClassSchema(ClassSchemaFor.kt:37)
at com.sksamuel.avro4k.schema.ClassSchemaFor.schema(ClassSchemaFor.kt:25)
at com.sksamuel.avro4k.schema.NullableSchemaFor.schema(SchemaFor.kt:124)
at com.sksamuel.avro4k.schema.ClassSchemaFor.buildField(ClassSchemaFor.kt:52)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[thake]

Still open

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[geomagilles]

Proposed a PR: #78