SI-7501 Pickler: owner adjustment for param syms in annotation args

Pickling of trees within annotation arguments led to an unfortunate
situation: the MethodType of a symbol contained a value parameter
symbol that was pickled as though it were owned by the enclosing
class (the root symbol of the pickle.)

Under separate compilation, this would appear as a member of that
class.

Anyone using `@deprecatedName('oldName)` was exposed to this problem,
as the argument expands to `Symbol.apply("oldName")`.

This commit extends some similar treatment of local type parameters
to also consider value parameters.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/neg/t7501.check b/test/files/neg/t7501.check
new file mode 100644
index 0000000000..2ded07c7ed
--- /dev/null
+++ b/test/files/neg/t7501.check
@@ -0,0 +1,7 @@
+t7501_2.scala:2: error: value name is not a member of A
+  def foo(a: A) = a.name
+                    ^
+t7501_2.scala:4: error: not found: type X
+  type TP = X // already failed before this fix
+            ^
+two errors found