Don't throw just because compilation fails

ahoppen · allevato · commit 156cc9ff2698 · 2018-09-07T00:55:40.000-07:00
This was originally "[swiftSyntax] Add test cases for the SyntaxClassifier" (apple/swift-syntax e7c90be). We don't actually pull in any SyntaxClassifier logic, but this commit does fix a bug where compiler errors cause the entire parse to fail.
diff --git a/Sources/SwiftSyntax/SwiftSyntax.swift b/Sources/SwiftSyntax/SwiftSyntax.swift
@@ -93,9 +93,6 @@ public enum SyntaxTreeParser {
   public static func parse(_ url: URL) throws -> SourceFileSyntax {
     let swiftcRunner = try SwiftcRunner(sourceFile: url)
     let result = try swiftcRunner.invoke()
-    guard result.wasSuccessful else {
-      throw ParserError.swiftcFailed(result.exitCode, result.stderr)
-    }
     let syntaxTreeData = result.stdoutData
     let deserializer = SyntaxTreeDeserializer()
     return try deserializer.deserialize(syntaxTreeData)
