[SR-12275] JSONEncoder on Linux can't encode number JSON fragments

[swift-ci]

Previous ID	SR-12275
Radar	rdar://problem/59830261
Original Reporter	xavier.lowmiller (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Environment

I tested this in the 5.1.4 Swift Docker Container from https://hub.docker.com/\_/swift

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Bug
Assignee	@spevans
Priority	Medium

md5: 824ef3e9951a0e0fa1f7b095708f76f3

relates to:

• SR-6163 JSONDecoder cannot decode RFC 7159 JSON

Issue Description:

Consider the following program:

import Foundation


let data = 2


do {
    let stored = try String(data: JSONEncoder().encode(data), encoding: .utf8)!


    print(stored)


    print(try JSONDecoder().decode(Int.self, from: Data(stored.utf8)))


} catch {
    print(error)
}

On macOS, this will work: The `JSONEncoder` produces a `Data` with contents `2`.

On Linux, this prints the following error:

invalidValue(2, Swift.EncodingError.Context(codingPath: [], debugDescription: "Top-level Int encoded as number JSON fragment.", underlyingError: nil))

[hborla]

@swift-ci create

[spevans]

#2713