php5.6 install swoole-2.0.11 get Segmentation fault

[bestlong]

Dockerfile:

FROM phusion/baseimage:latest

ENV DEBIAN_FRONTEND noninteractive

RUN set -xe && apt-get update && apt-get -y install software-properties-common
RUN add-apt-repository -y ppa:ondrej/php && apt-get update
RUN apt-get install -y php5.6-common php5.6-xml php5.6-dev

RUN pecl channel-update pecl.php.net

RUN pecl install swoole-2.0.11
RUN echo "extension=swoole.so" >> /etc/php/5.6/mods-available/swoole.ini
RUN ln -s /etc/php/5.6/mods-available/swoole.ini /etc/php/5.6/cli/conf.d/20-swoole.ini
RUN set -xe && php -m | grep -q 'swoole'

error info:

Step 10/10 : RUN set -xe && php -m | grep -q 'swoole'
 ---> Running in 59fbd32e3dba
+ php -m
+ grep -q swoole
Segmentation fault
The command '/bin/sh -c set -xe && php -m | grep -q 'swoole'' returned a non-zero code: 1
~/projects/docker/laradock$

[twose]

Coroutine version no longer supports PHP5

[bestlong]

Okay, i see. downgrade to 2.0.10.