Assert in cuckoo/mean_cuckoo.cpp:952

[daves0]

Describe the issue

I did a git pull of this repo this afternoon and build merit v0.5.6.0-d7a6129 on my Ubuntu 16.04 laptop. Next, I fired up merit-qt from a console window and starting mining. Since I didn't add the & to detach from the console, it stayed open and attached to the merit-qt process, which ran fine. After leaving for about two hours, I returned to find merit-qt gone and the following assertion in the console window:

merit-qt: cuckoo/mean_cuckoo.cpp:952: void edgetrimmer<offset_t, EDGEBITS, XBITS>::trimrename1(uint32_t, uint32_t) [with bool TRIMONV = false; offset_t = unsigned int; unsigned char EDGEBITS = 26u; unsigned char XBITS = 5u; uint32_t = unsigned int]: Assertion `maxnnid < P::NYZ2' failed.

Can you reliably reproduce the issue?

No. I ran merit-qt the same way again and it synced up the two hours of blocks, and then I started mining again without issue. Before I did this, I did back up my ~/.merit directory just in case it might hold something useful. I will leave merit-qt running and mining overnight and will update this report if it asserts again.

What version of merit-core are you using?

Self-compiled v0.5.6.0-d7a6129 .

Machine specs:

• OS: Ubuntu 16.04
• CPU: Intel Core i7-3610QM
• RAM: 15/6 GiB according to Ubuntu
• Disk size: 500GB
• Disk Type (HD/SDD): HD