Test for using dynamic types in type inference

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/DataFlowUtils.java

@@ -269,7 +269,8 @@ public class DataFlowUtils {
     @Nullable
     public static JetType checkImplicitCast(@Nullable JetType expressionType, @NotNull JetExpression expression, @NotNull ExpressionTypingContext context, boolean isStatement) {
         if (expressionType != null && context.expectedType == NO_EXPECTED_TYPE && context.contextDependency == INDEPENDENT && !isStatement
-                && (KotlinBuiltIns.getInstance().isUnit(expressionType) || KotlinBuiltIns.getInstance().isAnyOrNullableAny(expressionType))) {
+                && (KotlinBuiltIns.getInstance().isUnit(expressionType) || KotlinBuiltIns.getInstance().isAnyOrNullableAny(expressionType))
+                && !TypesPackage.isDynamic(expressionType)) {
             context.trace.report(IMPLICIT_CAST_TO_UNIT_OR_ANY.on(expression, expressionType));
         }
         return expressionType;

compiler/testData/diagnostics/tests/dynamicTypes/inference.kt

@@ -0,0 +1,29 @@
+// !MARK_DYNAMIC_CALLS
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+// MODULE[js]: m1
+// FILE: k.kt
+
+fun <T> foo(t1: T, t2: T): T = t1
+
+trait Tr
+class C: Tr
+fun <T: Tr> foo1(t1: T, t2: T): T = t1
+
+fun test(d: dynamic, b: Boolean, n: String?) {
+    foo(d, "").<!DEBUG_INFO_DYNAMIC!>foo<!>()
+    foo1(d, C()).<!DEBUG_INFO_DYNAMIC!>foo<!>()
+
+    val fromIf = if (b) d else ""
+    fromIf.<!DEBUG_INFO_DYNAMIC!>doo<!>()
+
+    val fromElvis = n ?: d
+    fromElvis.<!DEBUG_INFO_DYNAMIC!>doo<!>()
+}
+
+class In<in T>(t: T)
+fun <T> contra(a: In<T>, b: In<T>): T = null!!
+
+fun testContra(d: dynamic) {
+    contra(In(d), In("")).get(0) // not a dynamic call
+}

compiler/testData/diagnostics/tests/dynamicTypes/inference.txt

@@ -0,0 +1,27 @@
+package
+
+internal fun </*0*/ T> contra(/*0*/ a: In<T>, /*1*/ b: In<T>): T
+internal fun </*0*/ T> foo(/*0*/ t1: T, /*1*/ t2: T): T
+internal fun </*0*/ T : Tr> foo1(/*0*/ t1: T, /*1*/ t2: T): T
+internal fun test(/*0*/ d: dynamic, /*1*/ b: kotlin.Boolean, /*2*/ n: kotlin.String?): kotlin.Unit
+internal fun testContra(/*0*/ d: dynamic): kotlin.Unit
+
+internal final class C : Tr {
+    public constructor C()
+    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
+}
+
+internal final class In</*0*/ in T> {
+    public constructor In</*0*/ in T>(/*0*/ t: T)
+    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
+}
+
+internal trait Tr {
+    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/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -3758,6 +3758,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("inference.kt")
+            public void testInference() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/dynamicTypes/inference.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("membersOfAny.kt")
             public void testMembersOfAny() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/dynamicTypes/membersOfAny.kt");