[Compiler errors building swift] error: cannot find 'swiftCompilerLexRegexLiteral' in scope

Hi all,

Does anyone have ideas on how to resolve these compilation errors while building swift?

/Users/jreach/swift/SwiftCompilerSources/Sources/Parse/Regex.swift:53:34: error: cannot find 'swiftCompilerLexRegexLiteral' in scope
guard let (resumePtr, error) = swiftCompilerLexRegexLiteral(
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/jreach/swift/SwiftCompilerSources/Sources/Parse/Regex.swift:104:28: error: cannot find 'swiftCompilerParseRegexLiteral' in scope
let (_, version) = try swiftCompilerParseRegexLiteral(
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/jreach/swift/SwiftCompilerSources/Sources/Parse/Regex.swift:108:24: error: cannot find type 'CompilerParseError' in scope
} catch let error as CompilerParseError {
^~~~~~~~~~~~~~~~~~
/Users/jreach/swift/SwiftCompilerSources/Sources/Parse/Regex.swift:111:53: error: type of expression is ambiguous without more context
if let _diagLoc = diagLoc, let errorLoc = error.location {