Ruby library infected ???

[Pavel Fedin]

 Hello!
 Today i have updated 64-bit Cygwin and my antivirus gave me an alert:
--- cut ---
Filename	Risk		Action		Risk Type	Original
Location				Computer	User
Status
rational.so	Trojan.ADH	Pending Analysis	File; Virus
C:\cygwin64\lib\ruby\2.0.0\mathn\	FEDINW7X64	p.fedin	Infected
--- cut ---
 Can anybody recheck this ?

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia