Delay ForbidInferringTypeVariablesIntoEmptyIntersection to 2.*

Note: here we set sinceVersion = null for this feature.
However, we plan in 1.9.* - 2.0 time frame to solve KT-56377
and to enable this feature in 2.0, the latest in 2.1.

compiler/testData/diagnostics/tests/when/TypeParameterError.fir.kt

@@ -0,0 +1,25 @@
+// !LANGUAGE: +ForbidInferringTypeVariablesIntoEmptyIntersection
+// FILE: ObjectNode.java
+
+public interface ObjectNode {
+    <T extends JsonNode> T set(String fieldName, JsonNode value);
+}
+
+// FILE: JsonNode.java
+
+public class JsonNode
+
+// FILE: test.kt
+
+interface JsonObject
+class SomeJsonObject() : JsonObject
+
+fun String.put(value: JsonObject?, node: ObjectNode) {
+    <!INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION!>when (value) {
+        null -> node.set(this, null)
+        is SomeJsonObject -> Unit
+        else -> TODO()
+    }<!>
+}
+
+fun TODO(): Nothing = null!!

compiler/testData/diagnostics/tests/when/TypeParameterError.kt

@@ -0,0 +1,25 @@
+// !LANGUAGE: +ForbidInferringTypeVariablesIntoEmptyIntersection
+// FILE: ObjectNode.java
+
+public interface ObjectNode {
+    <T extends JsonNode> T set(String fieldName, JsonNode value);
+}
+
+// FILE: JsonNode.java
+
+public class JsonNode
+
+// FILE: test.kt
+
+interface JsonObject
+class SomeJsonObject() : JsonObject
+
+fun String.put(value: JsonObject?, node: ObjectNode) {
+    <!INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_ERROR!>when (value) {
+        null -> node.set(this, null)
+        is SomeJsonObject -> Unit
+        else -> TODO()
+    }<!>
+}
+
+fun TODO(): Nothing = null!!

compiler/testData/diagnostics/tests/when/TypeParameterError.txt

@@ -0,0 +1,32 @@
+package
+
+public fun TODO(): kotlin.Nothing
+public fun kotlin.String.put(/*0*/ value: JsonObject?, /*1*/ node: ObjectNode): kotlin.Unit
+
+public open class JsonNode {
+    public constructor JsonNode()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface JsonObject {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface ObjectNode {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract operator fun </*0*/ T : JsonNode!> set(/*0*/ fieldName: kotlin.String!, /*1*/ value: JsonNode!): T!
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class SomeJsonObject : JsonObject {
+    public constructor SomeJsonObject()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+

compiler/testData/diagnostics/tests/when/TypeParameterWarning.fir.kt

@@ -0,0 +1,25 @@
+// !LANGUAGE: -ForbidInferringTypeVariablesIntoEmptyIntersection
+// FILE: ObjectNode.java
+
+public interface ObjectNode {
+    <T extends JsonNode> T set(String fieldName, JsonNode value);
+}
+
+// FILE: JsonNode.java
+
+public class JsonNode
+
+// FILE: test.kt
+
+interface JsonObject
+class SomeJsonObject() : JsonObject
+
+fun String.put(value: JsonObject?, node: ObjectNode) {
+    <!INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION!>when (value) {
+        null -> node.set(this, null)
+        is SomeJsonObject -> Unit
+        else -> TODO()
+    }<!>
+}
+
+fun TODO(): Nothing = null!!

compiler/testData/diagnostics/tests/when/TypeParameterWarning.kt

@@ -0,0 +1,25 @@
+// !LANGUAGE: -ForbidInferringTypeVariablesIntoEmptyIntersection
+// FILE: ObjectNode.java
+
+public interface ObjectNode {
+    <T extends JsonNode> T set(String fieldName, JsonNode value);
+}
+
+// FILE: JsonNode.java
+
+public class JsonNode
+
+// FILE: test.kt
+
+interface JsonObject
+class SomeJsonObject() : JsonObject
+
+fun String.put(value: JsonObject?, node: ObjectNode) {
+    <!INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_WARNING!>when (value) {
+        null -> node.set(this, null)
+        is SomeJsonObject -> Unit
+        else -> TODO()
+    }<!>
+}
+
+fun TODO(): Nothing = null!!