Missiles buttons not showing up

[lolo101]

Observed behaviour

I have 6 smart missiles loaded in my ship
However in the HUD, the missile button is absent, so I cannot fire them

Note that on a previous flight, I had guided missiles and the butotn showed up correctly

button missing:

But missiles loaded:

Expected behaviour

The missile button is present so I can fire them

Steps to reproduce

Just load the savegame

My pioneer version (and OS):

20240710 (e123a3f) (Linux)

My output.txt (required) and game save (optional, but recommended)
output.txt
lolo2.gz

[impaktor]

I assume this issue will be fixed by the weapon re-write that's in the pipe line (assuming time & motivation to finish it).

[lolo101]

Note: I could fire a missile with the shortcut key.
Later I bought another smart missile to replace the one I used, and then the button showed up but displayed only 1 available missile whereas 6 of them were loaded into the ship

[sturnclaw]

This is a bug with the current equipment system. A rewrite is in progress and is targeted for merge before the next major update.

[dr-pegasus]

I think the problem lies in that the missile equipment slot is not always sorted, and is not sorted right after firing - causing the gui LUA script to have trouble doing a missile headcount.
A dirty quick-fix would be replacing ipairs() with pairs() in \data\pigui\modules\equipment.lua
in
local function displayMissiles(uiPos)

[sturnclaw]

Note that the underlying cause of this issue is already fixed in #5734.