Merge branch 'devel' of https://github.com/Araq/Nimrod into devel

tests/async/tasyncexceptions.nim

@@ -0,0 +1,38 @@
+discard """
+  file: "tasyncexceptions.nim"
+  exitcode: 1
+  outputsub: "Error: unhandled exception: foobar [E_Base]"
+"""
+import asyncdispatch
+
+proc accept(): PFuture[int] {.async.} =
+  await sleepAsync(100)
+  result = 4
+
+proc recvLine(fd: int): PFuture[string] {.async.} =
+  await sleepAsync(100)
+  return "get"
+
+proc processClient(fd: int) {.async.} =
+  # these finish synchronously, we need some async delay to emulate this bug.
+  var line = await recvLine(fd)
+  var foo = line[0]
+  if foo == 'g':
+    raise newException(EBase, "foobar")
+  
+
+proc serve() {.async.} =
+
+  while true:
+    var fut = await accept()
+    await processClient(fut)
+
+when isMainModule:
+  var fut = serve()
+  fut.callback =
+    proc () =
+      if fut.failed:
+        # This test ensures that this exception crashes the application
+        # as it is not handled.
+        raise fut.error
+  runForever()