Arduino-pro-ide: Installed on Ubuntu, got "not found: clangd" on launch

[djsegfault]

Describe the bug
When I launched the program I got a "Failed to start Arduino language server: Error: not found: clangd" dialog box

To Reproduce
Steps to reproduce the behavior:
1 Downloaded
2 I untarred the file under /opt on my Kubuntu 18.04.3 machine
3 Ran "/opt/Arduino-PoC-0.0.1-06ef598-linux/arduino-electron"
4 Got a dialog box "Failed to start Arduino language server: Error: not found: clangd"

Expected behavior
No error dialog

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]

Additional context

Here is the command line output, which includes a stack trace on that error

david@tracer:/dload/graphics/jdownloader$  /opt/Arduino-PoC-0.0.1-06ef598-linux/arduino-electron 

(arduino-electron:19598): Gtk-WARNING **: 04:20:27.857: Theme parsing error: gtk.css:68:35: The style property GtkButton:child-displacement-x is deprecated and shouldn't be used anymore. It will be removed in a future version

(arduino-electron:19598): Gtk-WARNING **: 04:20:27.857: Theme parsing error: gtk.css:69:35: The style property GtkButton:child-displacement-y is deprecated and shouldn't be used anymore. It will be removed in a future version

(arduino-electron:19598): Gtk-WARNING **: 04:20:27.857: Theme parsing error: gtk.css:73:46: The style property GtkScrolledWindow:scrollbars-within-bevel is deprecated and shouldn't be used anymore. It will be removed in a future version
root INFO Theia app listening on http://localhost:44067.
daemon INFO >>> Starting 'arduino-cli' daemon... [/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/build/arduino-cli]
daemon INFO [INFO] Checking for config file in: /home/david/.arduino15/arduino-cli.yaml
daemon INFO [INFO] Checking if CLI is Bundled into the IDE
daemon INFO [INFO] Candidate IDE Directory: /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/build
daemon INFO [INFO] CLI is not bundled into the IDE
daemon INFO [INFO] Checking for config in: /arduino-cli.yaml
daemon INFO [INFO] error loading [error: open /arduino-cli.yaml: no such file or directory]
daemon INFO [INFO] Checking for config in: /dload/arduino-cli.yaml
daemon INFO [INFO] error loading [error: open /dload/arduino-cli.yaml: no such file or directory]
daemon INFO [INFO] Checking for config in: /dload/graphics/arduino-cli.yaml
daemon INFO [INFO] error loading [error: open /dload/graphics/arduino-cli.yaml: no such file or directory]
daemon INFO [INFO] Checking for config in: /dload/graphics/jdownloader/arduino-cli.yaml
daemon INFO [INFO] error loading [error: open /dload/graphics/jdownloader/arduino-cli.yaml: no such file or directory]
daemon INFO [INFO] Configuration set
daemon INFO [INFO] arduino-cli-0.3.7-alpha.preview
daemon INFO [INFO] Starting root command preparation (`arduino`)
daemon INFO [INFO] Formatter set
daemon INFO <<< The 'arduino-cli' daemon is up an running.
root WARN please install @theia/[email protected] as a runtime dependency
root INFO Git askpass helper is listening on http://127.0.0.1:45827.
root WARN Failed to resolve module: @theia/editor
root WARN Failed to resolve module: @theia/electron
root WARN Failed to resolve module: @typefox/monaco-editor-core
root WARN Failed to resolve module: @theia/messages
root WARN Failed to resolve module: @theia/monaco
root WARN Failed to resolve module: @theia/navigator
root WARN Failed to resolve module: @theia/preferences
root WARN Failed to resolve module: @theia/textmate-grammars
root INFO Using Git [2.17.1] from the PATH. (/usr/bin/git)
root WARN Collided keybinding is ignored;  {"command":"monaco.editor.action.toggleTabFocusMode","keybinding":"ctrl+m"}  collided with  {"command":"core.toggleMaximized","keybinding":"ctrl+m"}
root WARN Could not register keybinding:
  {"command":"monaco.editor.action.toggleTabFocusMode","keybinding":"ctrl+m"}
Error: "ctrl+m" is in collision with something else [scope:0]
root WARN Collided keybinding is ignored;  {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"}  collided with  {"command":"terminal:clear","keybinding":"ctrlcmd+k","context":"terminalActive"}
root WARN Could not register keybinding:
  {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"}
Error: "ctrl+k" is in collision with something else [scope:0]
root WARN Collided keybinding is ignored;  {"command":"serial-monitor:toggle","keybinding":"ctrl+shift+m"}  collided with  {"command":"problemsView:toggle","keybinding":"ctrlcmd+shift+m"}
root WARN Could not register keybinding:
  {"command":"serial-monitor:toggle","keybinding":"ctrl+shift+m"}
Error: "ctrl+shift+m" is in collision with something else [scope:0]
root INFO [nsfw-watcher: 19689] Started watching: /home/david/Arduino/sketch_october20a
root INFO [nsfw-watcher: 19689] Started watching: /home/david/Arduino/sketch_october20b
root INFO [nsfw-watcher: 19689] Started watching: /home/david/Arduino/sketch_october20a
root INFO  >>> Creating and caching a new client for file:///home/david/Arduino/sketch_october20b...
root INFO [nsfw-watcher: 19689] Started watching: /home/david/Arduino/sketch_october20b
root WARN EditorNavigationContribution.onStart is slow, took: 112.09999999846332 ms
daemon INFO [INFO] Checking if CLI is Bundled into the IDE
daemon INFO [INFO] Candidate IDE Directory: /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/build
daemon INFO [INFO] Loading hardware from: /home/david/.arduino15/packages
daemon INFO [INFO] Loading package arduino from: /home/david/.arduino15/packages/arduino/hardware
daemon INFO [INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.2",Latest:"1.8.3",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/arduino/tools
root INFO Config file tasks.json does not exist under file:///home/david/Arduino/sketch_october20b
daemon INFO [INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO [INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/Arduino/libraries, location: sketchbook]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/.arduino15/packages/arduino/hardware/samd/1.8.2/libraries, location: platform]
daemon INFO [INFO] Installing tool [tool: Version: 5.8-arduino11 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Tool installed [tool: Version: 5.8-arduino11 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Installing tool [tool: Version: 1.0.0 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: arm64-linux-gnueabihf]]
daemon INFO [INFO] Tool installed [tool: Version: 1.0.0 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: arm64-linux-gnueabihf]]
daemon INFO [INFO] Loading hardware from: /home/david/.arduino15/packages
daemon INFO [INFO] Loading package arduino from: /home/david/.arduino15/packages/arduino/hardware
daemon INFO [INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.2",Latest:"1.8.3",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO [INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO [INFO] Loading package builtin from: /home/david/.arduino15/packages/builtin
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loaded tool [tool: Version: 5.8-arduino11 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.0.0 Systems: [OS: i686-pc-linux-gnu, OS: x86_64-pc-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: arm-linux-gnueabihf, OS: arm64-linux-gnueabihf]]
daemon INFO [INFO] instance:<id:1 >
root ERROR Request search failed with error: Could not retrieve instance from the initialize response. Error: Could not retrieve instance from the initialize response.
    at CoreClientProviderImpl.<anonymous> (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/lib/node/core-client-provider-impl.js:159:35)
    at step (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/lib/node/core-client-provider-impl.js:41:23)
    at Object.next (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/lib/node/core-client-provider-impl.js:22:53)
    at fulfilled (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/lib/node/core-client-provider-impl.js:13:58)
    at process._tickCallback (internal/process/next_tick.js:68:7)
root INFO Using Git [2.17.1] from the PATH. (/usr/bin/git)
root WARN Collided keybinding is ignored;  {"command":"monaco.editor.action.toggleTabFocusMode","keybinding":"ctrl+m"}  collided with  {"command":"core.toggleMaximized","keybinding":"ctrl+m"}
root WARN Could not register keybinding:
  {"command":"monaco.editor.action.toggleTabFocusMode","keybinding":"ctrl+m"}
Error: "ctrl+m" is in collision with something else [scope:0]
root WARN Collided keybinding is ignored;  {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"}  collided with  {"command":"terminal:clear","keybinding":"ctrlcmd+k","context":"terminalActive"}
root WARN Could not register keybinding:
  {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"}
Error: "ctrl+k" is in collision with something else [scope:0]
root WARN Collided keybinding is ignored;  {"command":"serial-monitor:toggle","keybinding":"ctrl+shift+m"}  collided with  {"command":"problemsView:toggle","keybinding":"ctrlcmd+shift+m"}
root WARN Could not register keybinding:
  {"command":"serial-monitor:toggle","keybinding":"ctrl+shift+m"}
Error: "ctrl+shift+m" is in collision with something else [scope:0]
root INFO [nsfw-watcher: 19814] Started watching: /home/david/.theia
root INFO [nsfw-watcher: 19814] Started watching: /home/david/Arduino/sketch_october20b
root INFO [nsfw-watcher: 19814] Started watching: /home/david/Arduino/sketch_october20b
root INFO  >>> Creating and caching a new client for file:///home/david/Arduino/sketch_october20b...
root INFO [nsfw-watcher: 19814] Started watching: /home/david/Arduino/sketch_october20b
daemon INFO [INFO] Checking if CLI is Bundled into the IDE
daemon INFO [INFO] Candidate IDE Directory: /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/arduino-ide-extension/build
daemon INFO [INFO] Loading hardware from: /home/david/.arduino15/packages
daemon INFO [INFO] Loading package arduino from: /home/david/.arduino15/packages/arduino/hardware
daemon INFO [INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.2",Latest:"1.8.3",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO [INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO [INFO] Loading package builtin from: /home/david/.arduino15/packages/builtin
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO [INFO] Loaded tool [tool: Version: 1.0.0]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/Arduino/libraries, location: sketchbook]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/.arduino15/packages/arduino/hardware/samd/1.8.2/libraries, location: platform]
root INFO [nsfw-watcher: 19814] Started watching: /home/david/Arduino/sketch_october20b
root INFO Config file tasks.json does not exist under file:///home/david/Arduino/sketch_october20b
root INFO [nsfw-watcher: 19814] Started watching: /home/david/Arduino/sketch_october20b/sketch_october20b.ino
daemon INFO [INFO] instance:<id:2 >
daemon INFO [INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
daemon INFO [INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
root WARN "[ino].editor.suggest.filteredTypes" preference is not supported
daemon INFO [INFO] Loading hardware from: /home/david/.arduino15/packages
daemon INFO [INFO] Loading package arduino from: /home/david/.arduino15/packages/arduino/hardware
daemon INFO [INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.2",Latest:"1.8.4",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO [INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO [INFO] Loading package builtin from: /home/david/.arduino15/packages/builtin
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO [INFO] Loaded tool [tool: Version: 1.0.0]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/Arduino/libraries, location: sketchbook]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/.arduino15/packages/arduino/hardware/samd/1.8.2/libraries, location: platform]
languages ERROR Error occurred while starting language contribution. /services/languages/ino/:id. Error: not found: clangd
    at getNotFoundError (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:13:12)
    at F (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:68:19)
    at E (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:80:29)
    at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:89:16
    at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/isexe/index.js:42:5
    at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/isexe/mode.js:8:5
    at FSReqWrap.oncomplete (fs.js:154:21)
daemon INFO [INFO] Updating libraries index
root ERROR The ws channel does not exist 25
daemon INFO [INFO] Loading hardware from: /home/david/.arduino15/packages
daemon INFO [INFO] Loading package arduino from: /home/david/.arduino15/packages/arduino/hardware
daemon INFO [INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.2",Latest:"1.8.4",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/arduino/tools
daemon INFO [INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO [INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO [INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO [INFO] Loading package builtin from: /home/david/.arduino15/packages/builtin
daemon INFO [INFO] Checking existence of 'tools' path: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loading tools from dir: /home/david/.arduino15/packages/builtin/tools
daemon INFO [INFO] Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO [INFO] Loaded tool [tool: Version: 1.0.0]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/Arduino/libraries, location: sketchbook]
daemon INFO [INFO] Adding libraries dir [dir: /home/david/.arduino15/packages/arduino/hardware/samd/1.8.2/libraries, location: platform]
root INFO  <<< New client has been successfully created and cached for file:///home/david/Arduino/sketch_october20b.
discovery INFO Initialized attached boards. - Discovered boards: []
root INFO Attached boards changed:  {"oldState":{"boards":[]},"newState":{"boards":[]}}

[gvarisco]

Hi! This can be solved by:
snap install clangd --classic

We will amend this requirement in the next build. /cc @mastrolinux

[djsegfault]

OK I tried "sudo apt-get install clang-tools-5.0" and that didn't fix it I just tried "sudo snap install clangd --classic" and that also didn't fix it. I got the same error

languages ERROR Error occurred while starting language contribution. /services/languages/ino/:id. Error: not found: clangd
at getNotFoundError (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:13:12)
at F (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:68:19)
at E (/opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:80:29)
at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/which/which.js:89:16
at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/isexe/index.js:42:5
at /opt/Arduino-PoC-0.0.1-06ef598-linux/resources/app/node_modules/isexe/mode.js:8:5
at FSReqWrap.oncomplete (fs.js:154:21)

[djsegfault]

$ snap info clangd
name: clangd
summary: Language Server Protocol implementation for C/C++ IDEs
publisher: Marco Trevisan (Treviño) (3v1n0)
license: unset
description: |
Clangd is an implementation of the Language Server Protocol leveraging Clang.
Clangd’s goal is to provide language “smartness” features like code
completion, find references, etc. for clients such as C/C++ Editors.

Clangd is not meant to be used by C/C++ developers directly but rather from a
client implementing the protocol. A client would be typically implemented in
an IDE or an editor.
commands:

• clangd
  snap-id: Nw2SyqKbD2SvyuOu5fFAxXJ1sjeOw8zx
  tracking: stable
  refresh-date: today at 04:40 EDT
  channels:
  stable: 6.0.0+git2102885 2018-01-06 (123) 6MB classic
  candidate: 6.0.0+gitbe38a81 2017-11-24 (37) 5MB classic
  beta: 6.0.0+gitbe38a81 2017-11-24 (37) 5MB classic
  edge: 10.0.0+gitc624032 2019-10-20 (2503) 9MB classic
  installed: 6.0.0+git2102885 (123) 6MB classic

[gvarisco]

Duplicate of #6

[djsegfault]

It looks like a duplicate of #6 however in my case the suggested fix did not work

[hulkco]

Hi! This can be solved by:
snap install clangd --classic

We will amend this requirement in the next build. /cc @mastrolinux

This work for me!!!

[mastrolinux]

some more details, if I run just the IDE:
root ERROR Arduino: 2019/11/15 17:38:33 Timeout exceeded while waiting for a reply from clangd: initialize
While if I run clangd manually everything starts to work correctly. It can be a timeout issue @kittaakos

[jankeromnes]

v0.0.3 has been released, so I guess let's move this issue to the v0.0.4 milestone.

@rsora Please let me know if I can help you produce a clangd binary for Linux somehow.

[spoenemann]

The next version v0.0.4 will bundle clangd also for Linux. Please open a new issue if there are problems running the bundled clangd with your Linux distribution.