Description:
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When you put this into php.ini:
memory_limit = 50;

The output results in:
Could not startup.


There should be a notification to let you know that the memory_limit isn't set 
properly. Maybe it's possible to do memory leaking or something like that through 
this? My knowledge for memory-related stuff is one to none, but maybe there's a 
potential bug here...

Test script:
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Change php.ini memory_limit to "50" like so:

memory_limit = 50;