PHP吞咽异常

我试图调试一个失败的PHP脚本。PHP吞咽异常

我发现引发异常的位置，但是该进程在可以被捕获之前退出。

我已经添加了两个try-catch块。周围的代码来自Magento。

class Varien_Image { 
    function __construct($fileName=null, $adapter=Varien_Image_Adapter::ADAPTER_GD2) 
    { 
     try { 
      $this->_getAdapter($adapter); 
      $this->_fileName = $fileName; 
      if (isset($fileName)) { 
       $this->open(); // throws here from a few frames deeper 
      } 
     } catch(Exception $e) { 
      echo "WE DO GET HERE\n"; 
      throw $e; 
     } 
    } 
    //... 
} 

class Mage_Catalog_Model_Product_Image ... { 
    //... 
    public function getImageProcessor() { 
     //... 
     try { 
      echo "START\n"; 
      $this->_processor = new Varien_Image($this->getBaseFile()); 
     } catch(Exception $e) { 
      echo "BUT WE NEVER GET HERE - THE PROCESS EXITS INSTEAD\n"; 
     } 
     //... 
    } 
    //... 
}

输出是

START 
WE DO GET HERE

为什么会异常被吞噬或导致进程死吗？

编辑

它退出时的状态码255

通过使用strace运行：

write(1, "WE DO GET HERE\n", 15WE DO GET HERE 
)  = 15 
write(3, "\1\0\0\0\1", 5)    = 5 
shutdown(3, SHUT_RDWR)     = 0 
close(3)        = 0 
munmap(0x7f254d9f3000, 151552)   = 0 
close(2)        = 0 
close(1)        = 0 
munmap(0x7f254da1f000, 4096)   = 0 
close(0)        = 0 
munmap(0x7f254da20000, 4096)   = 0 
munmap(0x7f2548d95000, 266240)   = 0 
munmap(0x7f2548d54000, 266240)   = 0 
munmap(0x7f2548c91000, 266240)   = 0 
brk(0x691f000)       = 0x691f000 
brk(0x679f000)       = 0x679f000 
brk(0x641e000)       = 0x641e000 
brk(0x5b9e000)       = 0x5b9e000 
brk(0x4f5e000)       = 0x4f5e000 
brk(0x4dde000)       = 0x4dde000 
brk(0x4c5e000)       = 0x4c5e000 
brk(0x4ade000)       = 0x4ade000 
brk(0x47de000)       = 0x47de000 
brk(0x465e000)       = 0x465e000 
brk(0x439e000)       = 0x439e000 
brk(0x3e9e000)       = 0x3e9e000 
brk(0x3813000)       = 0x3813000 
brk(0x3693000)       = 0x3693000 
brk(0x3513000)       = 0x3513000 
brk(0x3393000)       = 0x3393000 
munmap(0x7f2548c50000, 266240)   = 0 
munmap(0x7f2548cd2000, 266240)   = 0 
munmap(0x7f2548d13000, 266240)   = 0 
munmap(0x7f2548dd6000, 266240)   = 0 
munmap(0x7f2549e93000, 2126744)   = 0 
munmap(0x7f2549c63000, 2293440)   = 0 
munmap(0x7f2549a3a000, 2264288)   = 0 
munmap(0x7f254a09b000, 2131176)   = 0 
munmap(0x7f254a2a4000, 2247424)   = 0 
munmap(0x7f254aa01000, 2151656)   = 0 
munmap(0x7f254a4c9000, 5471824)   = 0 
munmap(0x7f254ac0f000, 2164040)   = 0 
munmap(0x7f254ae20000, 2209936)   = 0 
munmap(0x7f254b03c000, 2267912)   = 0 
brk(0x2c3a000)       = 0x2c3a000 
munmap(0x7f254d89e000, 1052672)   = 0 
munmap(0x7f254d99f000, 266240)   = 0 
munmap(0x7f254d84f000, 323584)   = 0 
exit_group(255)       = ? 
+++ exited with 255 +++

它立即呼应 '我们得到HERE'，然后开始关机。 fd 3上的SHUTDOWN是数据库的套接字。

来源

2015-10-22 Joel