trying to get rid of segfault

Dockerfile

@@ -27,7 +27,7 @@ RUN sed -i.bak 's/#ServerName www.example.com:80/ServerName svn.cpi.imtek.uni-fr
 RUN sed -i.bak 's/LogLevel warn/LogLevel debug/' /etc/apache2/httpd.conf
 RUN sed -i.bak 's/#LoadModule deflate_module/LoadModule deflate_module/' /etc/apache2/httpd.conf
 RUN sed -i.bak 's/#LoadModule logio_module/LoadModule logio_module/' /etc/apache2/httpd.conf
-RUN sed -i.bak 's/#LoadModule watchdog_module/CoreDumpDirectory /tmp/' /etc/apache2/httpd.conf
+RUN sed -i.bak 's/#LoadModule watchdog_module/CoreDumpDirectory \/tmp/' /etc/apache2/httpd.conf
 
 # copy the script to run httpd in foreground
 COPY httpd-foreground /usr/local/bin/