SI-8743 Fix crasher with poly-methods annotated with @varargs

The code that generated the Java varargs forwarder was basing
things on the `ValDef-s` of the parameters of the source method.
But, their types refer to a type parameter skolems of the enclosing
method, which led to a type mismatch when typechecking the forwarder.

Instead, I've reworked the code to simply use the `DefDef`-s symbol's
info, which *doesn't* refer to skolems. This actually simplifies the
surrounding code somewhat; rather than repeated symbols in a map
we can just time travel the pre-uncurry method signatures to figure
out which params are releated.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/files/jvm/varargs/VaClass.scala b/test/files/jvm/varargs/VaClass.scala
index 6343f9c6f6..e94e8a625a 100644
--- a/test/files/jvm/varargs/VaClass.scala
+++ b/test/files/jvm/varargs/VaClass.scala
@@ -9,5 +9,5 @@ class VaClass {
   @varargs def vs(a: Int, b: String*) = println(a + b.length)
   @varargs def vi(a: Int, b: Int*) = println(a + b.sum)
   @varargs def vt[T](a: Int, b: T*) = println(a + b.length)
-
+  @varargs def vt1[T](a: Int, b: T*): T = b.head
 }