mutated while being enumerated

[Commander McLane]

Still trying to get behind the bugs with the Thargoid Carrier.

After I left the game paused for more than a day and then un-paused it, I suddenly found lots of these in the log:

Code: Select all

00:09:32.288 [exception]: ***** Exception during [update:entity [<ShipEntity 0x101fc9800>{"Armoured Transport Type1" position: (-5831.07, -10958, 464248) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}]] in [Universe update:] : NSGenericException : *** Collection <NSCFSet: 0x11f549ab0> was mutated while being enumerated.<CFBasicHash 0x11f549ab0 [0x7fff70a03ee0]>{type = mutable set, count = 3,
entries =>
	1 : <ShipEntity 0x103b0b000>{"Mamba" position: (-6474.58, -4252.76, 486440) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}
	5 : <ShipEntity 0x1023fe400>{"Tiger Mark I" position: (-917.711, -5008.28, 487335) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}
	6 : <ShipEntity 0x102320800>{"Delta Long-Range Escort" position: (-5959.98, -8662.71, 470530) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}
}
 *****

Any ideas about this?

[JensAyton]

It means that (native) code is looping over a set of ships – looks like an escort group – and changing it during the traversal, which is not allowed. This is happening during the simulation step of the Armoured Transport Type1, which is probably the mothership of the escort group.

Edit: After some searching through the code, it seems unlikely that it’s actually an escort group.

[Eric Walch]

it seems unlikely that it’s actually an escort group.

The official escorts of the "Armoured Transport Type1" ship should be all the same and have the name: "Armoured Transport Viper". And there should only be 4 escorts maximum.

[cim]

I wonder if these two are other aspects of https://bb.oolite.space/viewtopic.php?f=3&t=13480 , which also appears to be some Mac-only memory corruption problem. There's certainly no obvious code path for either.

Do you still get the carrier oddities in the latest Mac nightly?

[Commander McLane]

I wonder if these two are other aspects of https://bb.oolite.space/viewtopic.php?f=3&t=13480 , which also appears to be some Mac-only memory corruption problem. There's certainly no obvious code path for either.

Do you still get the carrier oddities in the latest Mac nightly?

I haven't got around to installing the nightly, but I'm going to try over the weekend.

[Eric Walch]

It is also happening with ships that never have escorts:

Code: Select all

[exception]: ***** Exception during [update:entity [<ShipEntity 0x15163ba00>{"Urutu MkIV" position: (-2021.87, -5268.48, 40757.4) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}]] in [Universe update:] : NSGenericException : *** Collection <NSCFSet: 0x11ace3ef0> was mutated while being enumerated.<CFBasicHash 0x11ace3ef0 [0x7fff7129cee0]>{type = mutable set, count = 2,
entries =>
	2 : <ShipEntity 0x163982400>{"Cat Mark I" position: (-6272.51, 3709.3, 59673) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}
	5 : <ShipEntity 0x1512ed600>{"Delta Long-Range Escort" position: (-8532.48, 6728.94, 62275.9) scanClass: CLASS_NEUTRAL status: STATUS_IN_FLIGHT}
}
 *****

I tested the "Urutu MkIV" after the error message and the shipGroup and escortGroup were empty. This "Urutu MkIV" is always spawned as trader without escorts.

(1.77.1 build 5695-testrelease)