[SR-11192] XML Parsing Error Inconsistency

[swift-ci]

Previous ID	SR-11192
Radar	None
Original Reporter	drewag (JIRA User)
Type	Bug

Attachment: Download

Environment

Ubuntu 18.04.1 LTS

Additional Detail from JIRA

Votes	1
Component/s	Foundation
Labels	Bug
Assignee	None
Priority	Medium

md5: ff9373b93ccc832173ee59bb0c861712

Issue Description:

I'm getting different error results on Linux compared to Apple platforms. Here is a minimal example (file attached):

import Foundation

let data = "<blah //>".data(using: .utf8)!
let parser = XMLParser(data: data)
print(parser.parse())
// Prints 2 on Apple platforms
// Prints 7 on Linux
print("Column: \(parser.columnNumber)")