Bug 1440835

Thanks for a bug report. It sounds like:
https://bugzilla.gnome.org/show_bug.cgi?id=775075

but that change is part of evolution 3.22.3. I'll check what failed this time.

(In reply to Milan Crha from comment #2)
> I'll check what failed this time.

Works for me with local Drafts folder. I'm afraid there failed to save the draft, or it had been stuck in the background for some reason. Do you store Draft messages locally (under On This Computer/Drafts) o r remotely? It's viewed in Properties of the mail account, Defaults tab.

Could you grab a backtrace of the evolution, to see whether it does something in the background, please? You can get the backtrace with command like this:
   $ gdb --batch --ex "t a a bt" -pid=`pidof evolution` &>bt.txt
Please check the bt.txt for any private information, like passwords, email address, server addresses,... I usually search for "pass" at least (quotes for clarity only).

Only make sure that you'll have installed debuginfo packages for glib2, evolution and evolution-data-server (not for its dependencies, these three are enough) of the same version as their binary packages. Thanks in advance.

With Michal's help we discovered the issue. Its callstack is below and the steps are:
a) open evolution
b) File->New->Mail message
c) a new composer window opens, with focus on the To entry
d) type some address, like: a
e) press Tab twice, thus you are in Subject now
f) type: aaa
g) press Shift+Tab twice, thus back in the To entry
f) press Escape

This opens the dialog to Discard/Continue editing/Save draft. Click Save Draft, which, well, saves the draft, but doesn't close the composer.

The callstack:

webkit_editor_set_changed: editor:0x506ed10 changed:0~>1
           at g_object_set_valist() at gobject.c:1425
           by g_object_set() at gobject.c:2277
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3419
           by g_signal_emit() at gsignal.c:3449
           by g_object_dispatch_properties_changed() at gobject.c:1063
           by g_object_notify() at gobject.c:1158
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3419
           by g_signal_emit_by_name() at gsignal.c:3487
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3419
           by g_signal_emit_by_name() at gsignal.c:3487
           by end_change() at gtkentry.c:2868
           by gtk_entry_set_text() at gtkentry.c:7641
           by user_focus_in() at e-name-selector-entry.c:2071
           by _gtk_marshal_BOOLEAN__BOXED() at gtkmarshalers.c:90
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3403
           by g_signal_emit() at gsignal.c:3449
           by gtk_widget_event_internal() at gtkwidget.c:7725
           by gtk_widget_send_focus_change() at gtkwidget.c:16154
           by do_focus_change() at gtkwindow.c:8207
           by gtk_window_real_set_focus() at gtkwindow.c:8510
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3419
           by g_signal_emit() at gsignal.c:3449
           by _gtk_entry_grab_focus() at gtkentry.c:4959
           by gtk_entry_grab_focus() at gtkentry.c:4977
           by _g_closure_invoke_va() at gclosure.c:290
           by g_signal_emit_valist() at gsignal.c:3140
           by g_signal_emit() at gsignal.c:3449
           by gtk_widget_grab_focus() at gtkwidget.c:8013
           by e_msg_composer_restore_focus_on_composer() at e-msg-composer.c:5326
           by g_closure_invoke() at gclosure.c:290
           by signal_emit_unlocked_R() at gsignal.c:3140
           by g_signal_emit_valist() at gsignal.c:3419
           by g_signal_emit() at gsignal.c:3449
           by g_object_dispatch_properties_changed() at gobject.c:1063
           by g_object_notify() at gobject.c:1158
           by weak_refs_notify() at gobject.c:2637
           by g_object_unref() at gobject.c:3149
           by activity_bar_timeout_data_free() at e-activity-bar.c:73
           by g_source_callback_unref() at gmain.c:1548

Tested manually on x86_64, ppc64le and aarch64 using evolution-3.22.6-10.el7

I used reproducer from C5. After Esc and "Save Draft", the composer window closed.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:2066