Direct method count off: 15 vs 16

java.lang.IncompatibleClassChangeError: Structural change of com.xxx.xxx is hazardous (/data/app/com.xxx.xxx-1/oat/arm/base.odex at compile time, /data/user/0/com.xxx.xxx/cache/temp/opt/86a1cac5b4192c5f3d21af84ded67e3e/merged.dex at runtime): Direct method count off: 15 vs 16。
某个页面修改，用freeline编译，进入到该页面直接奔溃。这个一般会是什么原因？
我环境是：
macOS 10.12.2
Android 2.2.3
freelien 0.8.4
真机Android 7.0.0

Start by reproducing the crash after modifying a page and compiling with Freeline 0.8.4 on the reported Android 7.0 device. Compare the structural-change error involving base.odex and merged.dex, then determine the cause and document a reproducible fix or limitation.

Written by the indexing model from the issue text.