[backport] SI-7776 post-erasure signature clashes are now macro-aware

"double definition: macro this and method that have same type after erasure"
This error doesn't make sense when macros are involved, because macros
expand at compile-time, where we're not affected by erasure. Moreover,
macros produce no bytecode, which means that we're safe from VerifyErrors.

1 files changed, 12 insertions, 0 deletions

diff --git a/test/files/pos/t7776.scala b/test/files/pos/t7776.scala
new file mode 100644
index 0000000000..0340facd1b
--- /dev/null
+++ b/test/files/pos/t7776.scala
@@ -0,0 +1,12 @@
+import scala.language.experimental.macros
+import scala.reflect.macros.Context
+
+class MacroErasure {
+  def app(f: Any => Any, x: Any): Any = macro MacroErasure.appMacro
+  def app[A](f: A => Any, x: Any): Any = macro MacroErasure.appMacroA[A]
+}
+
+object MacroErasure {
+  def appMacro(c: Context)(f: c.Expr[Any => Any], x: c.Expr[Any]): c.Expr[Any] = ???
+  def appMacroA[A](c: Context)(f: c.Expr[A => Any], x: c.Expr[Any])(implicit tt: c.WeakTypeTag[A]): c.Expr[Any] = ???
+}
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