Comment 1 for bug 1645790

I have exactly the same problem. Here is the full output of the program:

$ pantheon-mail
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-2ubuntu0.16.04.2-b14)
OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'StylishWebView': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'GtkGrid': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'GtkGrid': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'GtkRevealer': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'GtkGrid': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'ConversationWidget': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gtk-WARNING **: drawing failure for widget 'GtkListBox': invalid value (typically too big) for the size of the input (surface, pattern, etc.)

(pantheon-mail:4193): Gdk-ERROR **: The program 'pantheon-mail' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAlloc (insufficient resources for operation)'.
  (Details: serial 4773 error_code 11 request_code 53 (core protocol) minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
Trace/breakpoint trap (core dumped)