[kovarex] [0.17.5] Crash after removing research

[kenzierocks]

I removed a research from the research queue, and then Factorio crashed. The specific research was Mining Productivity 3, and I had one of the Big Bag's Inventory researches following it.

[RampagingFido]

I also experienced a a crash of my client and server when canceling an item on the research queue. I attempted to reproduce the crash but I was able to cancel the research that caused my first crash with no problem. I began randomly canceling research items, after multiple attempts my server crashed and my client was disconnected. Attached is my save (no mods were used), the log and dumps files from the client and server zipped.

[chrisosa]

I also hit this in 0.17.5: removed several purple techs and refilled the queue with lower tier research. Game crashed as soon as I hit 'T' to exit the research screen. Logs attached in case more data is helpful.

[kovarex]

Thanks for the report, fixed for 0.17.6