NullPointerException

[hi-dhl]

v1.0.6

Problem Describe

01-09 15:08:08.781 14743 19215 E AndroidRuntime: java.lang.c: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference 01-09 15:08:08.781 14743 19215 E AndroidRuntime: at com.liulishuo.okdownload.core.download.DownloadCall.execute(DownloadCall.java:149) 01-09 15:08:08.781 14743 19215 E AndroidRuntime: at com.liulishuo.okdownload.core.NamedRunnable.run(NamedRunnable.java:32)

源码DownloadTask里面的url是final 并且不为空， 在我的代码里面，url 也是final 并且不为空，为什么这里会出现，空指针异常，不是必现，50次可能会出现一次

[EMIN3M1986]

if(!TextUtils.isEmpty(task.getURL())) {
...
}