No print to Output panel in infinite loop

[akien-mga]

Rephrasing issue #1287 which has become hard to read given the various other debugging issues which have been raised (and fixed) there.

Godot version:
All up to current master branch (ebd14a7).

OS/device including version:
Linux, likely other OSes too.

Issue description:
When using a print statement in an infinite loop, nothing will be printed to the Output panel. There are however prints to the system console/stdout.

Steps to reproduce:
Run a script with:

func _ready():
    var i = 0
    while true:
        i += 1
        print(i)

No text in Output panel. Terminal shows:

1
2
3
...
281694
281695
281696
281697
...

[DeuxAlpha]

Reproducible on Windows 10. Also, the type of loop does not matter, for and while-loop provide the same behavior.

EDIT:
Forgot to mention: If the loop breaks, the output-panel displays numbers up to a certain number in this manner:

[more numbers above]
6122
6123
6124
6125
6126[...]
[output overflow, print less text!]

The number where output overflow occurs seems arbitrary, and does not occur every time (might be worth opening another issue about, just thought I'd mention it)

[rogeriodec]

Same here...
Godot 3.1 official
Windows 10 x64

.
.
.
********pos_atu_eixo: -0.961239, meio eixo:1.698761
********pos_atu_eixo: -1.241239, meio eixo:1.698761
********pos_atu_eixo: -1.521239, meio eixo:1.698761
********pos_atu_eixo: -1.801239, meio eixo:1.698761
-----angulo_atu: -109.571818
********pos_atu_eixo: -1.801239, meio eixo:1.698761
-----angulo_atu: -163.047879
********pos_atu_eixo: -1.801239[...]
[output overflow, print less text!

How to solve this?

[KoBeWi]

Seems to be fixed since at least 3.1.2.

[Gameoholic]

Same issue is present in version 3.4.2