Good catch! Thank you for reporting this issue. I see that @UdjinM6 reviewed the issue, gave it a thumbs-up and a fix has been submitted.
I will give this a P4 priority rating, which has a bounty range of $100-$500 USD (see https://bugcrowd.com/dashdigitalcash). Does 0.5 Dash sound like a reasonable bounty? If so, private message me your Dash address and I will send you the bounty payment.
Thanks again for strengthening Dash by reporting this bug.
Whatever tip you decide to give me, its fine for me!
My address is always public as shown in my profile, because it will be used for the universal dividend foundation.
So please send the tip there:
To be honest. The bug I discovered is totally insignificant, because it doesnt affect the system during the runtime. It is just a nuisance during the compilation. This nuisance can be avoided if you upgrade to qt > 5.2, which can easily be done by almost everyone (except the ones who are using really old computers or the ones who are using unflexible embedded hardware devices). Fortunately after @UdjinM6 fixed the bug, not even this nuisance exists anymore. In conclusion, 0.5 dash is more than enough as a reward for the discovery of this bug.