Description

• We have observed intermittent issues when calling NativeFromBinary() on union types.
• After some investigations, we identified that a shared resource cr.allowedTypes was sorted and mutated, therefore causing the issue.

Repro steps:

• Given a codec created as NewCodecForStandardJSONFull([ "null", "long"])

  • When calling first codec.NativeFromTextual() with a long (e.g. codec.NativeFromTextual([]byte("1")))
  • And calling second codec.BinaryFromTextual() with a long value (e.g. codec.NativeFromBinary([]byte{0x02, 0x06}))

• Expected:
  native object is map[string]interface{}["long", 3]

• Actual:
  native object is `map[string]interface{}["null", 3]