Disable parallel compilation

The code related to thread poool crashes the container.
Running it on Windows has no problem.
It seems to be a bug with JDK/JVM.

Author: liufengyun

Diff for: compiler/test/dotty/tools/dotc/FromTastyTests.scala

@@ -22,7 +22,7 @@ class FromTastyTests extends ParallelTesting {
   def testFilter = Properties.testsFilter
   def updateCheckFiles: Boolean = Properties.testsUpdateCheckfile
 
-  @Test def posTestFromTasty: Unit = if (!scala.util.Properties.isWin) {
+  @Test def posTestFromTasty: Unit = {
     // Can be reproduced with
     // > sbt
     // > dotc -Ythrough-tasty -Ycheck:all <source>
@@ -33,7 +33,7 @@ class FromTastyTests extends ParallelTesting {
     ).checkCompile()
   }
 
-  @Test def runTestFromTasty: Unit = if (!scala.util.Properties.isWin) {
+  @Test def runTestFromTasty: Unit = {
     // Can be reproduced with
     // > sbt
     // > dotc -Ythrough-tasty -Ycheck:all <source>

Diff for: compiler/test/dotty/tools/vulpix/ParallelTesting.scala

@@ -541,26 +541,26 @@ trait ParallelTesting extends RunnerOrchestration { self =>
         }
 
         val eventualResults = filteredSources.map { target =>
-          pool.submit(encapsulatedCompilation(target))
+          encapsulatedCompilation(target)
         }
 
-        pool.shutdown()
+        // pool.shutdown()
 
-        if (!pool.awaitTermination(20, TimeUnit.MINUTES)) {
-          val remaining = new ListBuffer[TestSource]
-          filteredSources.lazyZip(eventualResults).foreach { (src, res) =>
-            if (!res.isDone)
-              remaining += src
-          }
+        // if (!pool.awaitTermination(20, TimeUnit.MINUTES)) {
+        //   val remaining = new ListBuffer[TestSource]
+        //   filteredSources.lazyZip(eventualResults).foreach { (src, res) =>
+        //     if (!res.isDone)
+        //       remaining += src
+        //   }
 
-          pool.shutdownNow()
-          System.setOut(realStdout)
-          System.setErr(realStderr)
-          throw new TimeoutException(s"Compiling targets timed out, remaining targets: ${remaining.mkString(", ")}")
-        }
+        //   pool.shutdownNow()
+        //   System.setOut(realStdout)
+        //   System.setErr(realStderr)
+        //   throw new TimeoutException(s"Compiling targets timed out, remaining targets: ${remaining.mkString(", ")}")
+        // }
 
         eventualResults.foreach { x =>
-          try x.get()
+          try x.run()
           catch {
             case ex: Exception =>
               System.err.println(ex.getMessage)