Stop using deprecated APIs

compiler/backend-common/src/bridges/bridges.kt

@@ -109,7 +109,7 @@ private fun <Function : FunctionHandle> findConcreteSuperDeclaration(function: F
     result.removeAll(toRemove)
 
     val concreteRelevantDeclarations = result.filter { !it.isAbstract }
-    if (concreteRelevantDeclarations.size != 1) {
+    if (concreteRelevantDeclarations.size() != 1) {
         error("Concrete fake override $function should have exactly one concrete super-declaration: $concreteRelevantDeclarations")
     }
 

compiler/backend-common/src/org/jetbrains/jet/backend/common/CodegenUtilKt.kt

@@ -62,7 +62,7 @@ public object CodegenUtilKt {
                                         (listOf(it) + DescriptorUtils.getAllOverriddenDescriptors(it)).map { it.getOriginal() }.contains(overriddenDescriptor.getOriginal())
                                     }
                         }
-                assert(actualDelegates.size <= 1) { "Meny delegates found for $delegatingMember: $actualDelegates" }
+                assert(actualDelegates.size() <= 1) { "Meny delegates found for $delegatingMember: $actualDelegates" }
 
                 actualDelegates.firstOrNull()
             }

compiler/backend-common/src/output.kt

@@ -24,7 +24,7 @@ public trait OutputFileCollection {
 }
 
 public class SimpleOutputFileCollection(private val outputFiles: List<OutputFile>) : OutputFileCollection {
-    override fun get(relativePath: String): OutputFile? = outputFiles.find { it.relativePath == relativePath }
+    override fun get(relativePath: String): OutputFile? = outputFiles.firstOrNull { it.relativePath == relativePath }
     override fun asList(): List<OutputFile> = outputFiles
 }