type migration: fix AIOOBE for method with generic varargs migration (EA-87127) update (IDEA-CR-19211)

java/typeMigration/testData/refactoring/typeMigration/genericEllipsis2/after/Test.items

@@ -0,0 +1,12 @@
+Types:
+PsiField:migrationField : Test<java.lang.Short>
+PsiMethodCallExpression:migrationField.method(x1, x2) : void
+PsiReferenceExpression:migrationField : Test<java.lang.Short>
+
+Conversions:
+migrationField.method(x1, x2) -> $
+x1 -> $
+x2 -> $
+
+New expression type changes:
+Fails:

java/typeMigration/testData/refactoring/typeMigration/genericEllipsis2/after/test.java

@@ -0,0 +1,11 @@
+class Test<X> {
+    private static Test<Short> migrationField;
+
+    private static void m(Short x1, Short x2) {
+        migrationField.method(x1, x2);
+    }
+
+    void method(X... xes) {
+
+    }
+}

java/typeMigration/testData/refactoring/typeMigration/genericEllipsis2/before/test.java

@@ -0,0 +1,11 @@
+class Test<X> {
+    private static Test<Number> migrationField;
+
+    private static void m(Short x1, Short x2) {
+        migrationField.method(x1, x2);
+    }
+
+    void method(X... xes) {
+
+    }
+}