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ulimit -c unlimited
            

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gdb php core 
gdb php /tmp/core.4596

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(gdb)bt
Program terminated with signal 11, Segmentation fault.
#0  0x00007f1cdbe205e0 in swServer_onTimer (reactor=<value optimized out>, event=...)  
    at /usr/local/php/swoole-swoole-1.5.9b/src/network/Server.c:92
92                              serv->onTimer(serv, timer_node->interval);
Missing separate debuginfos, use: debuginfo-install php-cli-5.3.3-22.el6.x86_64

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(gdb)f 1
(gdb)f 0

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CFLAGS = -Wall -pthread -g -O0

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