Merge pull request #8149 from dotty-staging/issue/8096/add-regression

fix #8096: add regression

Author: odersky

tests/neg/i8096.scala

@@ -0,0 +1,13 @@
+def k: Unit =
+  val s: String = try
+    "WUT"
+  catch case _ => println("caught something") // error: Type Mismatch Error
+
+  "OK" // warning: A pure expression does nothing in statement position
+
+def block: String = try "" catch case _ => () // error: Type Mismatch Error
+  "" // error: Expected a toplevel definition
+
+def i: Int = try 0 catch
+  case _ => () // error: Type Mismatch Error
+  1 // error: Expected a toplevel definition