Copying large output causes crash of all gnome-terminal instances

Steps to reproduce

1. Clone and update gnome-build-meta and install bst as instructed
2. Install ipython3 on the host
3. Build and start the latest development state with bst shell core/gnome-terminal.bst and then run gnome-terminal in the started shell
4. Start ipython3 and run

   for i in range(0, 14209470):
      print(i)

   and let it finish (10657101 allows to reproduce the issue, 7104735 is too low)
5. Click on Edit -> Select all in the menu

Expected outcome

gnome-terminal selects the text or displays a warning that it can't handle the large output for selection. The dialog should in the latter case recommend saving the content of the terminal into a file.

Actual outcome

All windows of gnome-terminal crash after allocating around 1GB RAM.

Unlimited scrollback is configured. This is probably troublesome, but should cause the application to crash.

This can also be reproduced with 3.36.2 using VTE 0.60.3 +BIDI +GNUTLS +ICU +SYSTEMD shipped with Ubuntu 20.04.