Merge pull request scala/scala#10335 from SethTisue/restarr-jdk20

Author: SethTisue

library/src/scala/io/Source.scala

@@ -132,7 +132,7 @@ object Source {
   /** same as fromURL(new URL(s))
    */
   def fromURL(s: String)(implicit codec: Codec): BufferedSource =
-    fromURL(new URL(s))(codec)
+    fromURL(new URI(s).toURL)(codec)
 
   /** same as fromInputStream(url.openStream())(Codec(enc))
    */

library/src/scala/util/Using.scala

@@ -226,6 +226,7 @@ object Using {
   }
 
   private def preferentiallySuppress(primary: Throwable, secondary: Throwable): Throwable = {
+    @annotation.nowarn("cat=deprecation")  // avoid warning on mention of ThreadDeath
     def score(t: Throwable): Int = t match {
       case _: VirtualMachineError                   => 4
       case _: LinkageError                          => 3

library/src/scala/util/control/NonFatal.scala

@@ -36,6 +36,7 @@ object NonFatal {
   /**
    * Returns true if the provided `Throwable` is to be considered non-fatal, or false if it is to be considered fatal
    */
+  @annotation.nowarn("cat=deprecation")  // avoid warning on mention of ThreadDeath
   def apply(t: Throwable): Boolean = t match {
     // VirtualMachineError includes OutOfMemoryError and other fatal errors
     case _: VirtualMachineError | _: ThreadDeath | _: InterruptedException | _: LinkageError | _: ControlThrowable => false