Better safe than sorry! While your replacing the receptable replace
the breaker TOO. I myself would try dead shorting the breaker just too
see if it trips. Then replace it no matter what!

The reason I say short it is if that if the breaker doesnt the OTHER
breakers in your panel may be bad too!!

!!!!If your panel is FPE!!!

Attention you have a known well documented fire hazard! The FPE stap
lock breakers are TERRIBLE! just google FPE

REPLACE PANEL IMMEDIATELY!