Hi,

Recently, I was playing Electron flags in electron-flags.conf file and encountered a bug in electron-launcher.sh (a.k.a. /usr/bin/elecron) script. In case there is multiple empty lines at the end of electron-flags.conf file, startup fails.
Running with bash -x shows that empty lines were converted into empty strings as arguments:
+ exec /usr/lib/electron/electron --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto '' '' '' '' '' '' /usr/lib/discord/app.asar

Complete output of bash -x:
[strela@stardust bin]$ bash -x ./electron /usr/lib/discord/app.asar
+ set -euo pipefail
+ name=electron
+ flags_file=/home/strela/.config/electron-flags.conf
+ declare -a flags
+ [[ -f /home/strela/.config/electron-flags.conf ]]
+ mapfile -t
+ for line in "${MAPFILE[@]}"
+ [[ ! --enable-features=WaylandWindowDecorations =~ ^[[:space:]]*#.* ]]
+ flags+=("${line}")
+ for line in "${MAPFILE[@]}"
+ [[ ! --ozone-platform-hint=auto =~ ^[[:space:]]*#.* ]]
+ flags+=("${line}")
+ for line in "${MAPFILE[@]}"
+ [[ ! '' =~ ^[[:space:]]*#.* ]]
...snip...
+ flags+=("${line}")
+ for line in "${MAPFILE[@]}"
+ [[ ! '' =~ ^[[:space:]]*#.* ]]
+ flags+=("${line}")
+ exec /usr/lib/electron/electron --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto '' '' '' '' '' '' /usr/lib/discord/app.asar

Electron apps that don't use the default script, like VScode, don't suffer from this problem. VSvode launcher "sed" instead of a bash array to print the flags.
Sed command in VScode launching script:
"$(sed 's/#.*//' $XDG_CONFIG_HOME/code-flags.conf | tr '\n' ' ')"

Solution is to use VScode launching script or to modify the current electron-laucher.sh to use "sed".

Modified VScode sript for electron is available in attachments under: "VScode-modified-electron-launcher.sh"
Modified electron-laucher.sh to use sed is available in attachments under: "modified electron-launcher.sh"


Additional info:
* package version(s): all of them

Affected apps:
* All apps that use /usr/bin/electron to startup
* And all apps that copied electron launcher for their own flags (e.g. Discord)

Not affected:
* Apps with custom starting/flag reading scripts (VScode) and run /usr/lib/electron/electron directly

Steps to reproduce:
1. Create electron-flags.conf file with multiple empty lines after the last line
2. Run app with /usr/bin/electron /usr/lib/discord/app.asar (or any app that calls /usr/bin/electron or copies electron-launcher.sh script (e.g. discord))

Workaround:
- Remove empty lines in electron-config

Regards,
Lightning5