Option added: switch off compilation of stdlib and jdk-headers

To achieve the desired result, in your run configuration add an environment variable named kotlin.tests.actually.compile and set it to "NO!"

compiler/tests/org/jetbrains/jet/codegen/forTestCompile/ForTestCompileJdkHeaders.java

@@ -50,6 +50,6 @@ public class ForTestCompileJdkHeaders {
 
     @NotNull
     public static File jdkHeadersForTests() {
-        return JdkHeaders.jdkHeaders.getJarFile();
+        return ForTestCompileSomething.ACTUALLY_COMPILE ? JdkHeaders.jdkHeaders.getJarFile() : new File("dist/kotlinc/lib/alt/kotlin-jdk-headers.jar");
     }
 }

compiler/tests/org/jetbrains/jet/codegen/forTestCompile/ForTestCompileRuntime.java

@@ -113,7 +113,7 @@ public class ForTestCompileRuntime {
 
     @NotNull
     public static File runtimeJarForTests() {
-        return Runtime.runtime.getJarFile();
+        return ForTestCompileSomething.ACTUALLY_COMPILE ? Runtime.runtime.getJarFile() : new File("dist/kotlinc/lib/kotlin-runtime.jar");
     }
 
 }

compiler/tests/org/jetbrains/jet/codegen/forTestCompile/ForTestCompileSomething.java

@@ -36,6 +36,8 @@ import java.util.jar.JarOutputStream;
  */
 abstract class ForTestCompileSomething {
 
+    public static final boolean ACTUALLY_COMPILE = "true".equals(System.getenv("kotlin.tests.actually.compile"));
+
     @NotNull
     private final String jarName;
     private Throwable error;