Case aside, there's only two possible strings it can match: 

AEEatomic.h
AEEatomic.h<LF>

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The string you tried to match 
./data/basic-socket-test/basic-socket-test.cpp:#include "AEEatomic.h"

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is neither. Perhaps you wanted 
/\Q$line\E/i

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In reply to Re: Why is the grep failing? by ikegami
in thread Why is the grep failing? by Anonymous Monk

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