Not enough space in (military rucksack?) pocket debug error after using heatpack

[PaulBlay]

Describe the bug

While heating up an entree from an MRE with a heat pack I got a debug error. It looks like more is being placed in the backpack that can actually fit there but it only notices when you try to use something?

DEBUG : volume exceeds capacity (3502ml > 3400ml)

FUNCTION : float item_contents::relative_encumbrance() const
FILE : src/item_contents.cpp
LINE : 1500

Steps To Reproduce

You can reliably reproduce the bug from the save below:

Narnia.zip

1. Load save. Note that you get the following error

DEBUG : error: item heatpack_used cannot fit into pocket while loading: not enough space

FUNCTION : void item_contents::combine(const item_contents&, bool)
FILE : src/item_contents.cpp
LINE : 335

Which looks like the same problem as #46852

2. Debug spawn in a heat pack
3. (a)ctivate heat pack and use it to heat something.
4. Observe error message

DEBUG : volume exceeds capacity (3502ml > 3400ml)

FUNCTION : float item_contents::relative_encumbrance() const
FILE : src/item_contents.cpp
LINE : 1500

Expected behavior

Not to have debug errors while using heat pack. There should probably be a "Heat pack is too heavy to pick up" shown when you try to find it in the list to (a)ctivate it (if it is too heavy). I'm not sure exactly what is going on.

Screenshots

Versions and configuration

• OS: Windows x64 8.1
• Game Version: 0.E-9155-g1319073-dirty [64-bit]
• Graphics Version: Tiles
• Game Language: English [en]
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Bionic Professions [package_bionic_professions],
  No Fungal Monsters [No_Fungi],
  Stats Through Skills [StatsThroughSkills],
  SpeedyDex [speedydex],
  Stats Through Kills [stats_through_kills]
  ]

Additional context

The heatpack is probably a little broken - you can use one to reheat an entire 20L of frozen water in a steel jerry can.

[PaulBlay]

Both this and the RC Car bug involve objects that change into other objects (heat pack -> used heat pack, RC Car -> RC Car (on) ). Maybe something is getting lost (or added) in the transformation?

[BrettDong]

Seems should add item_contents::overflow somewhere to enforce item pocket volume constraints.

[Night-Pryanik]

Can't confirm on 0.F-12701.