don't store subpats bound to underscore

also, tweak fix in place for SI-5158 to appease SI-6941
don't store mutable fields from scala.* as we can assume
these classes are well-behaved and do not mutate their
case class fields

1 files changed, 15 insertions, 0 deletions

diff --git a/test/files/jvm/patmat_opt_ignore_underscore/test.scala b/test/files/jvm/patmat_opt_ignore_underscore/test.scala
new file mode 100644
index 0000000000..6179101a7e
--- /dev/null
+++ b/test/files/jvm/patmat_opt_ignore_underscore/test.scala
@@ -0,0 +1,15 @@
+import scala.tools.partest.BytecodeTest
+
+import scala.tools.nsc.util.JavaClassPath
+import java.io.InputStream
+import scala.tools.asm
+import asm.ClassReader
+import asm.tree.{ClassNode, InsnList}
+import scala.collection.JavaConverters._
+
+object Test extends BytecodeTest {
+  def show: Unit = {
+    val classNode = loadClassNode("SameBytecode")
+    sameBytecode(getMethod(classNode, "a"), getMethod(classNode, "b"))
+  }
+}