CLI: don't fail on a wrong "-script" usage

compiler/cli/src/org/jetbrains/jet/cli/jvm/K2JVMCompiler.java

@@ -44,8 +44,7 @@ import java.util.Collections;
 import java.util.List;
 
 import static com.google.common.base.Predicates.in;
-import static org.jetbrains.jet.cli.common.ExitCode.INTERNAL_ERROR;
+import static org.jetbrains.jet.cli.common.ExitCode.*;
-import static org.jetbrains.jet.cli.common.ExitCode.OK;
 
 @SuppressWarnings("UseOfSystemOutOrSystemErr")
 public class K2JVMCompiler extends CLICompiler<K2JVMCompilerArguments> {
@@ -90,6 +89,11 @@ public class K2JVMCompiler extends CLICompiler<K2JVMCompilerArguments> {
         else if (arguments.module != null) {
         }
         else if (arguments.script) {
+            if (arguments.freeArgs.isEmpty()) {
+                messageCollector.report(CompilerMessageSeverity.ERROR, "Specify script source path to evaluate",
+                                        CompilerMessageLocation.NO_LOCATION);
+                return COMPILATION_ERROR;
+            }
             configuration.add(CommonConfigurationKeys.SOURCE_ROOTS_KEY, arguments.freeArgs.get(0));
         }
         else {

compiler/testData/cli/jvm/wrongScriptWithNoSource.args

@@ -0,0 +1 @@
+-script

compiler/testData/cli/jvm/wrongScriptWithNoSource.out

@@ -0,0 +1,2 @@
+ERROR: Specify script source path to evaluate
+COMPILATION_ERROR

compiler/tests/org/jetbrains/jet/cli/KotlincExecutableTestGenerated.java

@@ -109,6 +109,11 @@ public class KotlincExecutableTestGenerated extends AbstractKotlincExecutableTes
             doJvmTest("compiler/testData/cli/jvm/wrongKotlinSignature.args");
         }
         
+        @TestMetadata("wrongScriptWithNoSource.args")
+        public void testWrongScriptWithNoSource() throws Exception {
+            doJvmTest("compiler/testData/cli/jvm/wrongScriptWithNoSource.args");
+        }
+        
         @TestMetadata("compiler/testData/cli/jvm/wrongAbiVersionLib")
         @InnerTestClasses({})
         public static class WrongAbiVersionLib extends AbstractKotlincExecutableTest {