Editor crash - using a non-existing structure property in an expression

[Keith]

Describe what you were doing when the crash happened

Added ammo[1].max for the value of anything. In this case opacity. If the variable isn't defined it crashes when you click away from the field by doing something like clicking the background or another property box. It seems to be related to arrays of structures. It seems to be in the lost focus part. It happens in the app and while using the online version

app:
https://github.com/4ian/GDevelop/assets/113511006/a61d3fab-ac83-47b2-9d93-0386fbbb4ceb

web:

GDevelop version

5.3.186-0a6b0dc78508b65a61cf5bcad98827d8998a80e2

Platform info

System Version: 10.0.19045, Arch: x64, User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) GDevelop5/5.3.186 Chrome/100.0.4896.143 Electron/18.2.2 Safari/537.36, Platform: win32

Additional error context

uniqueErrorId: ecd1a66a-9f87-4481-a709-225f78b1cb62

RuntimeError: memory access out of bounds
at wasm://wasm/00b41e4e:wasm-function[832]:0x495ee
at wasm://wasm/00b41e4e:wasm-function[1266]:0x7cc81
at wasm://wasm/00b41e4e:wasm-function[2561]:0x18aae7
at wasm://wasm/00b41e4e:wasm-function[2590]:0x18bc10
at wasm://wasm/00b41e4e:wasm-function[3968]:0x1c16c8
at Function.ExpressionCompletionFinder.STATIC_GetCompletionDescriptionsFor.ExpressionCompletionFinder.STATIC_GetCompletionDescriptionsFor [as getCompletionDescriptionsFor] (file:///D:/users/keith/appdata/local/Programs/GDevelop/resources/app.asar/www/libGD.js?cache-buster...

Additional component context

in n
in ForwardRef
in div
in s
in f
in div
in div
in s
in div
in ForwardRef
in t
in ForwardRef
in div
in div
in a
in Jg
in div
in ForwardRef
in ForwardRef
in div
in div
in ForwardRef
in ForwardRef
in div
in t
in ForwardRef
in k
in div
in ForwardRef
in ForwardRef
in ForwardRef
in ForwardRef
in Unknown
in dx
in t
in Unknown
in px
in t
in div
in n
in l
in n
in ForwardRef(Em)
in n
in t
in Unknown
in QM
in di...

[Clément Pasteau]

Thanks @doug13579 I can reproduce this consistently, we'll fix it