tdf#98797 sw: try to fix crash in SwMailDispatcherListener_Impl

Commit c48df7ad7d49ac093058ceb28d6d3f272f6e2e07 added a isDisposed()
call in SwMailDispatcherListener_Impl::idle() and i can't see why that
would not be necessary in the other functions that access
m_pSendMailDialog if it is necessary in idle() - it's not obvious *why*
it would be necessary in idle() in the first place but obviously i don't
understand when SwSendMailDialog::dispose() is invoked (which is what
deletes m_pStatus, dereferencing which the backtrace crashes).

There is code in SwSendMailDialog::dispose() to handle the case that the
xMailDispatcher thread is still running, and stop it without joining,
which would obviously trigger this crash if it were ever executed.

(Maybe i should actually try what happens at runtime, but these
mail-merge dialogs are all scarily confusing.)

Change-Id: I550f6107b064b0c97f3d33bed5bd3830fa2e86f4
(cherry picked from commit aa35f2981334ba2e5aed4269fe851054bbc584dc)
Reviewed-on: https://gerrit.libreoffice.org/26353
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/sw/source/ui/dbui/mmoutputtypepage.cxx b/sw/source/ui/dbui/mmoutputtypepage.cxx
index 5b7a4a77190b..01249920d212 100644
--- a/sw/source/ui/dbui/mmoutputtypepage.cxx
+++ b/sw/source/ui/dbui/mmoutputtypepage.cxx
@@ -182,7 +182,8 @@ void SwMailDispatcherListener_Impl::mailDelivered(
                         uno::Reference< mail::XMailMessage> xMailMessage)
 {
     SolarMutexGuard aGuard;
-    m_pSendMailDialog->DocumentSent( xMailMessage, true, nullptr );
+    if (!m_pSendMailDialog->isDisposed())
+        m_pSendMailDialog->DocumentSent( xMailMessage, true, nullptr );
     DeleteAttachments( xMailMessage );
 }
 
@@ -192,7 +193,8 @@ void SwMailDispatcherListener_Impl::mailDeliveryError(
                 const OUString& sErrorMessage)
 {
     SolarMutexGuard aGuard;
-    m_pSendMailDialog->DocumentSent( xMailMessage, false, &sErrorMessage );
+    if (!m_pSendMailDialog->isDisposed())
+        m_pSendMailDialog->DocumentSent( xMailMessage, false, &sErrorMessage );
     DeleteAttachments( xMailMessage );
 }