Dictionary suggests its methods in [] autocompletion

[KoBeWi]

Tested versions

4.3 beta1
I don't remember it happening before.

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 31.0.15.4633) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

The [] operator can be used on Object to access its properties and methods (as Callables), and apparently Dictionary is treated the same way.

Steps to reproduce

var d: Dictionary
d["

2. Put caret after " and press Ctrl+Space

Minimal reproduction project (MRP)

N/A

[matheusmdx]

Actually this happens since 4.0 alpha 1, at least in alpha 1 the autocompletation show the keys, because between 4,0 alpha 1 and 4,0 beta 1 something changed and now only show the dictionary methods

[akien-mga]

Related to #76955 and #79378.

[KoBeWi]

Showing known keys is expected, showing methods is not, because they can't be accessed this way.