diff --git a/pom.xml b/pom.xml
index 2ba3992ec..7df98f81d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -230,6 +230,11 @@
             </execution>
           </executions>
         </plugin>
+        <plugin>
+          <groupId>org.apache.felix</groupId>
+          <artifactId>maven-bundle-plugin</artifactId>
+          <version>2.5.3</version>
+        </plugin>
       </plugins>
     </pluginManagement>
   </build>
diff --git a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
index d9f425035..79b934ff1 100644
--- a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
+++ b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
@@ -99,7 +99,10 @@ public class ChromeRDPDebugger implements JavaScriptDebugger, ChromeRDPExchangeC
                     if (jsonMessage.has("id")) {
                         Response response = mapper.reader(Response.class).readValue(jsonMessage);
                         if (response.getError() != null) {
-                            System.err.println("#" + jsonMessage.get("id") + ": " + response.getError().toString());
+                            if (logger.isWarnEnabled()) {
+                                logger.warn("Error message #{} received from browser: {}", jsonMessage.get("id"),
+                                        response.getError().toString());
+                            }
                         }
                         responseHandlers.remove(response.getId()).received(response.getResult());
                     } else {
@@ -338,7 +341,6 @@ public class ChromeRDPDebugger implements JavaScriptDebugger, ChromeRDPExchangeC
                         logger.warn("Error setting breakpoint at {}, message id is {}",
                                 breakpoint.getLocation(), message.getId());
                     }
-                    System.err.println();
                     breakpoint.chromeId = null;
                 }
                 for (JavaScriptDebuggerListener listener : getListeners()) {
diff --git a/teavm-classlib/pom.xml b/teavm-classlib/pom.xml
index b9fc345ec..e6ed96817 100644
--- a/teavm-classlib/pom.xml
+++ b/teavm-classlib/pom.xml
@@ -72,7 +72,6 @@
             <phase>process-test-classes</phase>
             <configuration>
               <minifying>false</minifying>
-              <numThreads>1</numThreads>
               <properties>
                 <java.util.Locale.available>en, en_US, en_GB, ru, ru_RU</java.util.Locale.available>
               </properties>
diff --git a/teavm-core/src/main/java/org/teavm/codegen/SourceWriter.java b/teavm-core/src/main/java/org/teavm/codegen/SourceWriter.java
index aabebf1e5..5e2749cb4 100644
--- a/teavm-core/src/main/java/org/teavm/codegen/SourceWriter.java
+++ b/teavm-core/src/main/java/org/teavm/codegen/SourceWriter.java
@@ -83,7 +83,7 @@ public class SourceWriter implements Appendable, LocationProvider {
             if (csq.charAt(i) == '\n') {
                 appendSingleLine(csq, last, i);
                 newLine();
-                last = i;
+                last = i + 1;
             }
         }
         appendSingleLine(csq, last, end);
diff --git a/teavm-html4j/pom.xml b/teavm-html4j/pom.xml
index b9ad71bd3..cbbf55eae 100644
--- a/teavm-html4j/pom.xml
+++ b/teavm-html4j/pom.xml
@@ -79,7 +79,6 @@
             <phase>process-test-classes</phase>
             <configuration>
               <minifying>false</minifying>
-              <numThreads>1</numThreads>
               <outputDir>${project.build.directory}/javascript-test</outputDir>
               <debugInformationGenerated>true</debugInformationGenerated>
               <sourceMapsGenerated>true</sourceMapsGenerated>
@@ -93,7 +92,6 @@
             <phase>process-test-classes</phase>
             <configuration>
               <minifying>false</minifying>
-              <numThreads>1</numThreads>
               <scanDependencies>true</scanDependencies>
               <outputDir>${project.build.directory}/javascript-tck</outputDir>
               <adapterClass>org.teavm.html4j.testing.KOTestAdapter</adapterClass>