I was doing some fiddling around in the lab scenario of the Editor Extensions mod, and this error popped up when I attempted to use Shift+R to reverse rotate a piece of belt:

The mod Stack Combinator (1.6.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event stack-combinator::dolly-rotate-rectangle (ID 203)
__stack-combinator__/scripts/other-mods/picker-dollies.lua:29: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
__stack-combinator__/scripts/other-mods/picker-dollies.lua:29: in function 'handler'
__stdlib__/stdlib/event/event.lua:342: in function 'pcall'
__stdlib__/stdlib/event/event.lua:362: in function 'dispatch_event'
__stdlib__/stdlib/event/event.lua:438: in function <__stdlib__/stdlib/event/event.lua:396>

All controls that I currently have mapped to Shift + R include:
- Base game: Reverse rotate
- Picker Dollies: Rotate oblong combinator
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