Run slow flexible type assertions only in test mode

compiler/tests/org/jetbrains/kotlin/jvm/compiler/FlexibleTypeAssertionsEnabledTest.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.jvm.compiler
+
+import org.jetbrains.kotlin.load.java.lazy.types.LazyJavaTypeResolver
+import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.test.KotlinTestWithEnvironmentManagement
+
+class FlexibleTypeAssertionsEnabledTest : KotlinTestWithEnvironmentManagement() {
+
+    fun testAssertionsAreOn() {
+        val builtIns = JvmPlatform.builtIns
+
+        try {
+            LazyJavaTypeResolver.FlexibleJavaClassifierTypeCapabilities.create(
+                    builtIns.intType, builtIns.stringType).arguments
+        } catch (e: AssertionError) {
+            assertEquals("Lower bound Int of a flexible type must be a subtype of the upper bound String", e.message)
+            return
+        }
+
+        fail("Assertion error expected")
+    }
+}

compiler/tests/org/jetbrains/kotlin/test/KotlinTestWithEnvironmentManagement.java

@@ -19,10 +19,12 @@ package org.jetbrains.kotlin.test;
 import com.intellij.testFramework.UsefulTestCase;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment;
+import org.jetbrains.kotlin.types.DelegatingFlexibleType;
 
 public abstract class KotlinTestWithEnvironmentManagement extends UsefulTestCase {
     static {
         System.setProperty("java.awt.headless", "true");
+        DelegatingFlexibleType.RUN_SLOW_ASSERTIONS = true;
     }
 
     @NotNull

core/descriptors/src/org/jetbrains/kotlin/types/flexibleTypes.kt

@@ -128,7 +128,8 @@ open class DelegatingFlexibleType protected constructor(
             return DelegatingFlexibleType(lowerBound, upperBound, extraCapabilities)
         }
 
-        internal val ASSERTIONS_ENABLED = DelegatingFlexibleType::class.java.desiredAssertionStatus()
+        @JvmField
+        var RUN_SLOW_ASSERTIONS = false
     }
 
      // These assertions are needed for checking invariants of flexible types.
@@ -140,7 +141,7 @@ open class DelegatingFlexibleType protected constructor(
     private var assertionsDone = false
 
     private fun runAssertions() {
-        if (assertionsDone || !ASSERTIONS_ENABLED) return
+        if (!RUN_SLOW_ASSERTIONS || assertionsDone) return
         assertionsDone = true
 
         assert (!lowerBound.isFlexible()) { "Lower bound of a flexible type can not be flexible: $lowerBound" }