No __ as lambda parameter

compiler/frontend/src/org/jetbrains/kotlin/types/expressions/FunctionsTypingVisitor.kt

@@ -27,11 +27,8 @@ import org.jetbrains.kotlin.diagnostics.DiagnosticUtils
 import org.jetbrains.kotlin.diagnostics.Errors.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getAnnotationEntries
-import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.BindingContext.EXPECTED_RETURN_TYPE
-import org.jetbrains.kotlin.resolve.BindingContextUtils
-import org.jetbrains.kotlin.resolve.BindingTrace
-import org.jetbrains.kotlin.resolve.FunctionDescriptorUtil
 import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil
 import org.jetbrains.kotlin.resolve.scopes.LexicalWritableScope
 import org.jetbrains.kotlin.resolve.source.toSourceElement
@@ -141,7 +138,10 @@ public class FunctionsTypingVisitor(facade: ExpressionTypingInternals) : Express
         val functionTypeExpected = !noExpectedType(expectedType) && KotlinBuiltIns.isFunctionOrExtensionFunctionType(expectedType)
 
         val functionDescriptor = createFunctionLiteralDescriptor(expression, context)
-        expression.valueParameters.forEach { components.identifierChecker.checkDeclaration(it, context.trace) }
+        expression.valueParameters.forEach {
+            components.identifierChecker.checkDeclaration(it, context.trace)
+            UnderscoreChecker.checkNamed(it, context.trace)
+        }
         val safeReturnType = computeReturnType(expression, context, functionDescriptor, functionTypeExpected)
         functionDescriptor.setReturnType(safeReturnType)
 

compiler/testData/diagnostics/tests/Underscore.kt

@@ -14,3 +14,7 @@ fun <!UNDERSCORE_IS_DEPRECATED!>__<!>(<!UNDERSCORE_IS_DEPRECATED!>___<!>: Int, y
     val `_` = __________
     <!UNDERSCORE_IS_DEPRECATED!>__<!>@ return if (y != null) __(____, y) else __(`_`, ______)
 }
+
+fun doIt(f: (Any?) -> Any?) = f(null)
+
+val something = doIt { <!UNDERSCORE_IS_DEPRECATED!>__<!> -> __ }

compiler/testData/diagnostics/tests/Underscore.txt

@@ -1,7 +1,9 @@
 package
 
 public val ______: _<kotlin.Int>
+public val something: kotlin.Any?
 public fun __(/*0*/ ___: kotlin.Int, /*1*/ y: _<kotlin.Int>?): kotlin.Int
+public fun doIt(/*0*/ f: (kotlin.Any?) -> kotlin.Any?): kotlin.Any?
 
 @kotlin.Deprecated(message = "") @kotlin.data() public final class Pair {
     public constructor Pair(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)