Bug Report

esp32:esp32 and esp8266:esp8266 cores installed via core install but an error is generated during board list and no boards are discovered. There are currently 2 network connected esp32 boards both supporting OTA which works flawlessly from the IDE.

Current behavior

$arduino-cli board list
arduino-cli board list
Downloading missing tool builtin:serial-discovery@1.3.0-rc1...
builtin:serial-discovery@1.3.0-rc1 downloaded
Installing builtin:serial-discovery@1.3.0-rc1...
builtin:serial-discovery@1.3.0-rc1 installed
Error initializing instance: loading platform release esp8266:esp8266@3.0.0: loading boards: skipping loading of boards esp8266:esp8266:espduino: malformed custom board options
Port Type Board Name FQBN Core
/dev/cu.Bluetooth-Incoming-Port Serial Port Unknown
/dev/cu.SLAB_USBtoUART Serial Port (USB) Unknown

Expected behavior

List discoverable boards, similar to those IDE v1 port menu. Allow flashing over the network to one of those boards.

Environment

• CLI version (output of arduino-cli version): arduino-cli alpha Version: nightly-20210620 Commit: 2173c12 Date: 2021-06-20T01:25:39Z
• OS and platform: MacOS Mojave 10.14.6 18.7.0 Darwin Kernel Version 18.7.0: Tue Jan 12 22:04:47 PST 2021; root:xnu-4903.278.56~1/RELEASE_X86_64 x86_64

Additional context

This does not happen with version 0.18.3

./arduino-cli version
arduino-cli alpha Version: 0.18.3 Commit: d710b64 Date: 2021-05-14T12:36:58Z

./arduino-cli board list
Port Type Board Name FQBN Core
/dev/cu.Bluetooth-Incoming-Port Serial Port Unknown
/dev/cu.SLAB_USBtoUART Serial Port (USB) Unknown