From 6ae376a4544cbf93b94dc0a6ba4a78224e0477df Mon Sep 17 00:00:00 2001
From: Guillaume Martres <smarter@ubuntu.com>
Date: Tue, 4 Apr 2017 19:17:42 +0200
Subject: checkNoPrivateLeaks: Do not allow types to refer to leaky aliases

`checkNoPrivateLeaks` can force a lot of things, this lead to
hard-to-reproduce issues in unpickling because we called
`checkNoPrivateLeaks` on the type parameters of a class before anything
in the class was indexed. We fix this by making sure that
`checkNoPrivateLeaks` never transforms type symbols, only term symbols,
therefore we can unpickle type parameters without forcing too many
things. tests/neg/leak-type.scala illustrates the new restriction that
this necessitates.
---
 tests/pos/i1130.scala         |  4 +++-
 tests/pos/leak-inferred.scala | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 tests/pos/leak-inferred.scala

(limited to 'tests/pos')

diff --git a/tests/pos/i1130.scala b/tests/pos/i1130.scala
index 8d71de5e8..c28eaa169 100644
--- a/tests/pos/i1130.scala
+++ b/tests/pos/i1130.scala
@@ -3,4 +3,6 @@ trait A {
 
   def foo: Foo = 1
 }
-class B extends A
+class B extends A {
+  foo
+}
diff --git a/tests/pos/leak-inferred.scala b/tests/pos/leak-inferred.scala
new file mode 100644
index 000000000..5d8a7e3bc
--- /dev/null
+++ b/tests/pos/leak-inferred.scala
@@ -0,0 +1,12 @@
+class A {
+  private val x = List(1,2)
+
+  val elem = x.head
+}
+
+class B extends A {
+  val a: Int = elem
+    // Without `checkNoPrivateLeaks`, we get:
+    // found:    B.this.x.scala$collection$immutable$List$$A(B.this.elem)
+    // required: Int
+}
-- 
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