fix more tests

Author: olhotak

compiler/src/dotty/tools/dotc/typer/RefChecks.scala

@@ -1238,6 +1238,7 @@ object RefChecks {
     if ctx.explicitNulls && !ctx.isJava
         && sym.exists && sym.owner.isClass
         && !sym.owner.isAnonymousClass
+        && !sym.owner.name.isReplWrapperName
         && !sym.isOneOf(JavaOrPrivateOrSynthetic | InlineProxy | Param | Exported) then
       val resTp = sym.info.finalResultType
       if resTp.existsPart(_.isInstanceOf[FlexibleType], StopAt.Static) then

compiler/test/dotty/tools/backend/jvm/DottyBytecodeTests.scala

@@ -1591,7 +1591,7 @@ class DottyBytecodeTests extends DottyBytecodeTest {
       assertInvoke(getMethod(c, "f1"), "[Ljava/lang/String;", "clone") // array descriptor as receiver
       assertInvoke(getMethod(c, "f2"), "java/lang/Object", "hashCode") // object receiver
       assertInvoke(getMethod(c, "f3"), "java/lang/Object", "hashCode")
-      assertInvoke(getMethod(c, "f4"), "java/lang/Object", "toString")
+      assertInvoke(getMethod(c, "f4"), "java/util/Objects", "toString")
     }
   }
 

repl/test/dotty/tools/repl/ReplCompilerTests.scala

@@ -120,8 +120,8 @@ class ReplCompilerTests extends ReplTest:
     assert(storedOutput().startsWith("java.lang.StackOverflowError"))
 
   @Test def `i3305 NPE`: Unit = initially:
-    run("null.toString")
-    assert(storedOutput().startsWith("java.lang.NullPointerException"))
+    run("null.hashCode")
+    assert(storedOutput().contains("java.lang.NullPointerException"))
 
   @Test def `i3305 IAE`: Unit = initially:
     run("""throw new IllegalArgumentException("Hello")""")

repl/test/dotty/tools/repl/SaveTests.scala

@@ -174,7 +174,7 @@ class SaveTests extends ReplTest, SessionFileHelpers {
     } andThen {
       storedOutput()
       run("s.trim")
-      assertEquals(List("val res0: String = \":help\""), lines())
+      assertEquals(List("val res0: (String)? = \":help\""), lines())
     }
 
   @Test def roundTripsSeparatorInStringViaLoad =

repl/test/dotty/tools/repl/TabcompleteTests.scala

@@ -279,8 +279,8 @@ class TabcompleteTests extends ReplTest {
       List(
         "(separator: Char): Array[String]",
         "(separators: Array[Char]): Array[String]",
-        "(x$0: String): Array[String]",
-        "(x$0: String, x$1: Int): Array[String]"
+        "(x$0: (String)?): (Array[(String)?])?",
+        "(x$0: (String)?, x$1: Int): (Array[(String)?])?"
       ),
       tabCompleteSignatures(""""".split""", "split")
     )