"proxy 0x63fa0a611d50 already has listener" error

When I create a new project using Builder, the application window is not resizable. I get the error below on the terminal when I move the cursor in and out of the window. What could be the reason for this? It happens with the default built-in template before even adding any line of code.

The debugging message is coming from the wayland-client library. I cannot reproduce with Builder and the latest GNOME run time; which version of Builder are you using? Which version of the GNOME run time? Which version of GNOME Shell are you using?

You’ll have to step through the execution with a debugger like GDB (which is also integrated in Builder) to see what’s causing that message—though I’d like to point out that “DEBUG” priority messages are invisible by default, and are only shown by Builder during development.

Thanks for the quick response. I use:

  • Builder v46.1
  • The org.gnome.Platform runtime v46
  • GNOME Shell 42.9

I don’t know how to fix it in Wayland but the error seems to disappear after switching to x11.