@theia/task Doesn't run task, creates new terminal

Description

Terminal/Run task does not execute the example tasks in the tasks readme. Instead, it opens new terminals. To verify it wasn't my environment, I spun up a vm in gcloud with a bash environment. Here are some gifs to demonstrate:

• On my zsh environment:

• On the gcloud bash environment:

Reproduction Steps

This is while developing my own extension, so to be sure I started a new "hello world" extension project using the tutorial steps. Then I go into "browser-app", execute:

yarn add @theia/task

to add the extension. I also tried running yarn add in my extension directory.

Restart the project and try to run a task.

OS and Theia version:

• zsh environment:

Linux pop-os 5.0.0-21-generic #22+system76-Ubuntu SMP Tue Jul 16 19:57:52 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

-gcloud bash environment:

Linux 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u3 (2019-06-16) x86_64 GNU/Linux

Diagnostics: There the errors that I see: :

0|api | root WARN Collided keybinding is ignored; {"command":"outlineView:toggle","keybinding":"ctrlcmd+shift+s"} collided with {"command":"file.saveAs","keybinding":"ctrl+shift+s"} 0|api | root WARN Could not register keybinding: 0|api | {"command":"outlineView:toggle","keybinding":"ctrlcmd+shift+s"} 0|api | Error: "ctrlcmd+shift+s" is in collision with something else [scope:0] 0|api | root WARN Collided keybinding is ignored; {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"} collided with {"command":"terminal:clear","keybinding":"ctrlcmd+k","context":"terminalActive"} 0|api | root WARN Could not register keybinding: 0|api | {"command":"passthrough","keybinding":"ctrl+k","context":"terminalActive"} 0|api | Error: "ctrl+k" is in collision with something else [scope:0] 0|api | root WARN e.onStart is slow, took: 108.82500000298023 ms 0|api | root WARN e.onStart is slow, took: 1282.455000007758 ms 0|api | root ERROR Error(s) reading config file: file:///home/david/georq_workspace/.theia/tasks.json 0|api | root ERROR Couldn't resize terminal -1, because it doesn't exist. 0|api | root ERROR Couldn't resize terminal -1, because it doesn't exist. 0|api | terminal ERROR Couldn't attach - can't find terminal with id: 12 0|api | terminal ERROR Error attaching to terminal id 12, the terminal is most likely gone. Starting up a new terminal instead.

On the zsh environment it is a little more verbose:

Started watching: /home/david/src/map_workspace/.theia/tasks.json task INFO Created new task, id: 0, process id: 10, OS PID: 14940, context: file:///home/david/src/map_workspace terminal ERROR Couldn't attach - can't find terminal with id: 10 root ERROR Couldn't resize terminal -1, because it doesn't exist. terminal ERROR Error attaching to terminal id 10, the terminal is most likely gone. Starting up a new terminal instead.

So clearly, the task extension cannot find the current terminal and then starts a new terminal, but doesn't run the task either way.