"render_buffer" breaks after being disconnected from texture "scale"

[TheMindVirus]

Modules
texture;buffers;render_buffer
texture;modifiers;scale

Description
When you connect up a scenario with a "render_buffer" followed by a texture "scale", it works fine until you delete the "scale" and reconnect the "render_buffer" back to a "textured_rectangle" (connected to screen).

Steps to Replicate
1. Open VSXu Artiste.
2. Add the following modules from the module list in this order:
"colored_rectangle"
"buffer_clear"
"render_buffer"
"scale"
"textured_rectangle"
3. Connect the following modules to each other as specified below:
"colored_rectangle" "render_out" -> "buffer_clear" "render_in"
"buffer_clear" "render_out" -> "render_buffer" "render_in"
"render_buffer" "texture_out" -> "scale" "texture_in"
"scale" "texture_scale_out" -> "textured_rectangle" "texture_in"
"textured_rectangle" "render_out" -> "screen0" "screen"
4. Change the "color_buffer" and "depth_buffer" parameters of "buffer_clear" to "yes".
5. Mess around with the parameters of "colored_rectangle" and "scale".
This should work fine.
6. Delete the "scale" module.
7. Connect the "texture_out" of "render_buffer" to the "texture_in" of "textured_rectangle".
8. Mess around with the parameters of "colored_rectangle".
This should result in unexpected behaviour, such as a whited-out preview screen.
To temporarily fix the problem, delete the "render_buffer" module and replace it with a new one.