Fix empty message crash. (#162)

* Fix empty message crash.

* wip

* wip

Author: mbrandonw

Sources/IssueReportingTestSupport/SwiftTesting.swift

@@ -14,6 +14,7 @@ private func __recordIssue(
   column: Int
 ) {
   #if canImport(Testing)
+    let message = message == "" ? nil : message
     Issue.record(
       message.map(Comment.init(rawValue:)),
       sourceLocation: SourceLocation(

Tests/IssueReportingTests/SwiftTestingTests.swift

@@ -129,6 +129,36 @@
           && issue.description == "Issue recorded: Something went wrong"
       }
     }
+
+    @Test
+    func emptyMessage() {
+      withKnownIssue {
+        reportIssue("")
+      }
+    }
+
+    @Test
+    func emptyMessage_async() async {
+      await withKnownIssue {
+        await Task.yield()
+        reportIssue("")
+      }
+    }
+
+    @Test
+    func emptyMessage_throws() throws {
+      withKnownIssue {
+        reportIssue("")
+      }
+    }
+
+    @Test
+    func emptyMessage_asyncThrows() async throws {
+      await withKnownIssue {
+        await Task.yield()
+        reportIssue("")
+      }
+    }
   }
 
   private struct Failure: Error {}