Shell script syntax highlighting gets confused when using dict with square brackets in key name

[SkyLined]

Type: Bug

Create a new file in VSCode and add the following content:

#!/bin/bash
declare -A a=();
a["[]"]=x;
b=${a["[]"]}; # this is incorrectly highlighted as part of a string
echo ${b}; # this too, it only ends after this double quote: " (this is highlighted as script)

On line 4, the syntax highlighter appears to understand that the code is setting a value of the a dict key named "[]" to x.
On line 5, the syntax highlighter gets confused: the code is getting a value of the a dict key named "[]", but instead of rendering the entire key name as a value, it appears to believe the key name ends at the closing square bracket in the key name (i.e. key name is "[). This also means that the closing double quote in the key name is considered to be an opening quote for a string, causing the remainder of the line (and subsequent lines) to be incorrectly shown as part of that string.

I've left out system information and extensions because they should be irrelevant.

VS Code version: Code 1.85.1 (0ee08df, 2023-12-13T09:49:37.021Z)
OS version: Windows_NT x64 10.0.22000
Modes:

A/B Experiments

vsliv368:30146709
vsreu685:30147344
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes627:30244334
vslsvsres303:30308271
vshan820:30294714
vscod805cf:30301675
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593:30376534
py29gd2263:30899288
vsclangdc:30486549
c4g48928:30535728
azure-dev_surveyone:30548225
f6dab269:30613381
962ge761:30917236
pythongtdpath:30769146
i26e3531:30792625
welcomedialogc:30910334
pythonidxpt:30866567
pythonnoceb:30805159
asynctok:30898717
pythontestfixt:30902429
pythonregdiag2cf:30928864
pyreplss1:30897532
pythonmypyd1:30879173
pythoncet0:30885854
h48ei257:30885898
pythontbext0:30879054
dsvsc016:30899300
dsvsc017:30899301
dsvsc018:30899302
aa_t_chat:30882232
cp7184t3:30927821

[RedCMD]

should move to the orignal repo https://github.com/jeff-hykin/better-shell-syntax

[alexr00]

Copied to jeff-hykin/better-shell-syntax#74