SI-5877 Support implicit classes in package objects

This used to crash, as both the package and the package object
had the synthetic method in `decls`, and the typer tried to add
the tree to both places.

Now, synthetics in the package object are excluded from the pacakge
itself.

1 files changed, 13 insertions, 0 deletions

diff --git a/test/files/pos/t5877b.scala b/test/files/pos/t5877b.scala
new file mode 100644
index 0000000000..6b8cbd473e
--- /dev/null
+++ b/test/files/pos/t5877b.scala
@@ -0,0 +1,13 @@
+package foo
+
+class Foo
+
+object Test {
+  new Foo().huzzah
+}
+
+object `package` {
+  implicit class PimpedFoo2(value: Foo) {
+    def huzzah = ""
+  }
+}