Do not allow inference of type arguments on the rhs if there's no information available

compiler/testData/diagnostics/tests/cast/bare/AsNullableNotEnough.kt

@@ -0,0 +1,8 @@
+trait Tr
+trait G<T>
+
+fun test(tr: Tr) {
+    val v = tr as <!NO_TYPE_ARGUMENTS_ON_RHS!>G?<!>
+    // If v is not nullable, there will be a warning on this line:
+    v!!: G<*>
+}

compiler/testData/diagnostics/tests/cast/bare/FromErrorType.kt

@@ -0,0 +1,6 @@
+class G<T>
+
+fun foo(p: <!UNRESOLVED_REFERENCE!>P<!>) {
+    val v = <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>p<!> <!USELESS_CAST!>as<!> <!NO_TYPE_ARGUMENTS_ON_RHS!>G?<!>
+    v!!: G<*>
+}

compiler/testData/diagnostics/tests/cast/bare/NullableAsNotEnough.kt

@@ -0,0 +1,7 @@
+trait Tr
+trait G<T>
+
+fun test(tr: Tr?) {
+    val v = tr as <!NO_TYPE_ARGUMENTS_ON_RHS!>G<!>
+    v: G<*>
+}

compiler/testData/diagnostics/tests/cast/bare/NullableAsNullable.kt

@@ -0,0 +1,8 @@
+trait Tr<T>
+trait G<T> : Tr<T>
+
+fun test(tr: Tr<String>?) {
+    val v = tr as G?
+    // If v is not nullable, there will be a warning on this line:
+    v!!: G<String>
+}

compiler/testData/diagnostics/tests/cast/bare/NullableAsNullableNotEnough.kt

@@ -0,0 +1,7 @@
+trait Tr
+trait G<T>
+
+fun test(tr: Tr?) {
+    val v = tr as <!NO_TYPE_ARGUMENTS_ON_RHS!>G?<!>
+    v!!: G<*>
+}

compiler/testData/diagnostics/tests/cast/bare/UnrelatedAs.kt

@@ -2,6 +2,6 @@ trait Tr
 trait G<T>
 
 fun test(tr: Tr) {
-    val v = tr as G
+    val v = tr as <!NO_TYPE_ARGUMENTS_ON_RHS!>G<!>
     v: G<*>
-}
+}

compiler/testData/diagnostics/tests/cast/bare/UnrelatedIs.kt

@@ -1,4 +1,4 @@
 trait Tr
 trait G<T>
 
-fun test(tr: Tr) = tr is G
+fun test(tr: Tr) = tr is <!NO_TYPE_ARGUMENTS_ON_RHS!>G<!>