invalid cast from 'GMimeMultipart' to 'GMimePart'
I'm on Ubuntu 20.04.
Today I pulled the latest Geary from git mainline and tried running it. The first time I tried to send an email message, I got this error:
*[wrn] 05:00:22.0177 GLib-GObject:invalid cast from 'GMimeMultipart' to 'GMimePart'
![crt] 05:01:13.0502 gmime:g_mime_part_get_content: assertion 'GMIME_IS_PART (mime_part)' failed
Here's a log with a full backtrace:
(Given this bug I'll have to switch back to 3.37.1 for now.)