Handle warnings from unquote functions

Author: josevalim

Diff for: lib/elixir/lib/module/parallel_checker.ex

@@ -334,7 +334,7 @@ defmodule Module.ParallelChecker do
 
   defp position_to_tuple(position) do
     case position[:column] do
-      nil -> position[:line]
+      nil -> position[:line] || 0
       col -> {position[:line], col}
     end
   end

Diff for: lib/elixir/test/elixir/kernel/diagnostics_test.exs

@@ -153,7 +153,7 @@ defmodule Kernel.DiagnosticsTest do
              """
     end
 
-    test "trim inbetween lines if too many" do
+    test "trim in between lines if too many" do
       output =
         capture_raise(
           """

Diff for: lib/elixir/test/elixir/module/types/integration_test.exs

@@ -695,6 +695,29 @@ defmodule Module.Types.IntegrationTest do
 
       assert_warnings(files, warnings)
     end
+
+    test "reports unquote functions" do
+      files = %{
+        "a.ex" => """
+        defmodule A do
+          @deprecated "oops"
+          def a, do: :ok
+        end
+        """,
+        "b.ex" => """
+        defmodule B do
+          def b, do: unquote(&A.a/0)
+        end
+        """
+      }
+
+      warnings = [
+        "A.a/0 is deprecated. oops",
+        "b.ex: B.b/0"
+      ]
+
+      assert_warnings(files, warnings)
+    end
   end
 
   defp assert_warnings(files, expected) when is_binary(expected) do