sminux

**Description** Return value of a function 'VMGroupRoles::get' is dereferenced at VMGroupXML.cc: https://github.com/OpenNebula/one/blob/1ae1de46dc59b1c277a205fbe16dd7618e6aa57b/src/scheduler/src/pool/VMGroupXML.cc#L177-L179 without checking for NULL, but it is usually checked for this function (4 of 5). Like that: https://github.com/OpenNebula/one/blob/1ae1de46dc59b1c277a205fbe16dd7618e6aa57b/src/scheduler/src/pool/VMGroupXML.cc#L428-L433...

Hello, devs! I'm using afl-ruby instead of ruzzy (because of using ruby2.5, ruzzy doesn't support this version), but AFL-Ruby is very suitable for this reason, thanks a lot! But trying...

fix #67

If q, err := New(content, level) returns an error when the content is too long https://github.com/skip2/go-qrcode/blob/da1b6568686e89143e94f980a98bc2dbd5537f13/qrcode.go#L114C2-L114C31 'q' may be nil and is dereferenced at qrcode.go:116. > panic: runtime error: invalid...