Adventure map, crash during AI turn

[Branikolog]

Preliminary checks

• I've checked that there aren't other open issues on the same topic.
• I've checked that this issue is reproducible on the latest snapshot build.

Platform

Windows

Describe the bug

Application crashes without any message when blue AI appears in a stone liths near to my hero:

Two blue heroes jump into stone liths:

App crashes only in a case one of them appears near my hero. (Probably need some reloads to catch this exit exactly)

Save file

crash 01.zip

Additional info

No response

[Branikolog]

Actually, crashes each time any AI enemy appears in this stone liths.

[oleg-derevenetz]

This crash is due to failed assertion on UI turn. That's because ore mine at tile 8543 (that one to the right from the Witch's Hut on your screenshot) has no metadata regarding its production (its _metadata field contains only zeroes). I can reproduce this crash in debug build just by clicking the right mouse button on this mine because of additional debug output that causes this assertion failure as well. I believe it's related to #7084.

[oleg-derevenetz]

Hi @Branikolog was this map started on the latest build (at least after merging of #7084) or was it loaded from an earlier save (if yes, can we get this save somehow as well)?

[ihhub]

It's an Ore Mine at tile 8543 nearby Orange Knight castle. Most likely this save is made from an old one as for a new game it works absolutely fine.

[Branikolog]

Hi, @ihhub and @oleg-derevenetz
I've decided to continue one of my old save files yesterday but overwritten it.
But I've found one from the same walkthrough even more old. Accidentally it's the one with the exact moment I've captured this mine. Which is crashing on the current build.
On older build I can check the mine info without crashes.
221.zip

[ihhub]

The problem is that there is a hero standing on this mine and since heroes were not loaded at the time of processing metadata for the mine the object type is OBJ_NONE.