get_stack() returns a empty arrary in EditorPlugin

[MikeSchulze]

Godot version: Godot Engine v3.2.2.stable.mono.official (c) 2007-2020 Juan Linietsky, Ariel Manzur & Godot Contributors.

OS/device including version: Windows 10

Issue description: I want to use get_stack() in my editor plugin to show line numbers of failing tests. When call 'get_stack()' inside running editor plugin it returns a empty array

Steps to reproduce:

• create a empty editor plugin and add

  
  tool
  extends EditorPlugin

func _enter_tree(): prints("_enter_tree", get_stack())

output

_enter_tree []

[Vaasref]

I think this issue is due to get_stack() not working on any thread other than the main thread.

[ctrlraul]

It also does that in builds, I wonder if it's for the same reason.

Since push_error doesn't include the stack trace in the .log files I wrote a logger that would do it using get_stack(), but doesn't seem to be possible, which makes the .log files less useful.

func log_error(message: String) -> void:

    if OS.has_feature("editor"):
        push_error(message)

    else:

        # Not running from editor, so create an error
        # message that actually shows up in the logs

        var stack: Array = get_stack()
        var error: String = "ERROR: %s" % message

        stack.pop_front() # Remove the "log_error" call itself from the stack

        for point in stack:
            error += "\n  at %s:%s - %s" % [point.source, point.line, point.function]

        printerr(error)

Suddenly it makes sense why push_error doesn't log the stack trace.