Changing export float to INF, then saving will write inf.0 to tscn and prevent it from opening

[nathanfranke]

Godot version:
3.2 RC 2

OS/device including version:
Linux Mint 19.3

Issue description:
Setting an export(float) through code such as my_float_value = INF followed by saving will save the float to the tscn file with a value inf.0.

Steps to reproduce:

• Open TestScene.tscn in the reproduction project
• Click on TestScene and view Script Variables
• Click on "Make Infinite" boolean thing in order to test the problem
• No modifications will be seen due to Exported variables are not updated in the inspector when their value is changed via GDScript #21009
• Scene -> Save Scene (or Control + S)
• Scene -> Close Scene (or Control + Shift + W)
• Open the scene again
  

$ cat TestScene.tscn
...
[node name="TestScene" type="Node2D"]
script = ExtResource( 1 )
my_float_value = inf.0

Minimal reproduction project:
Test1.zip

[tastesliketriangle]

I was able to reproduce this error. On Windows 7 with a version of godot built from source a couple weeks ago.

[aaronfranke]

Can reproduce on Linux (Ubuntu 18.04 64-bit, 3.2 rc2), same error as described in the OP.

Can't reproduce on Windows 10 (3.2 rc2). In the editor it says 1.#IO, but 1.#INF is saved into the TSCN file. Still a weird issue, but neither causes the file from failing to load.