build scripts: log exception caused an error if any

build/groovy/org/jetbrains/intellij/build/BuildContext.groovy

@@ -151,6 +151,8 @@ interface BuildMessages {
    */
   void error(String message)
 
+  void error(String message, Throwable cause)
+
   void progress(String message)
   public <V> V block(String blockName, Closure<V> body)
 

build/groovy/org/jetbrains/intellij/build/impl/AntTaskLogger.groovy

@@ -55,7 +55,7 @@ class AntTaskLogger implements BuildListener {
     BuildMessages handler = threadHandlers[Thread.currentThread()] ?: taskHandlers[event.task?.runtimeConfigurableWrapper] ?: defaultHandler
     switch (event.priority) {
       case Project.MSG_ERR:
-        handler.error(message)
+        handler.error(message, event.exception)
         break
       case Project.MSG_WARN:
         handler.warning(message)

build/groovy/org/jetbrains/intellij/build/impl/BuildMessagesImpl.groovy

@@ -92,6 +92,11 @@ class BuildMessagesImpl implements BuildMessages {
     throw new BuildException(message)
   }
 
+  @Override
+  void error(String message, Throwable cause) {
+    throw new BuildException(message, cause)
+  }
+
   @Override
   void progress(String message) {
     if (parentInstance != null) {