patch 8.1.1898: crash when out of memory during startup

Problem:    Crash when out of memory during startup.
Solution:   When out of memory message given during initialisation bail out.
            (closes #4842)
diff --git a/src/misc2.c b/src/misc2.c
index db8392c..8cdd0d4 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -1014,14 +1014,19 @@
 {
     if (!did_outofmem_msg)
     {
-	/* Don't hide this message */
+	// Don't hide this message
 	emsg_silent = 0;
 
-	/* Must come first to avoid coming back here when printing the error
-	 * message fails, e.g. when setting v:errmsg. */
+	// Must come first to avoid coming back here when printing the error
+	// message fails, e.g. when setting v:errmsg.
 	did_outofmem_msg = TRUE;
 
 	semsg(_("E342: Out of memory!  (allocating %lu bytes)"), (long_u)size);
+
+	if (starting == NO_SCREEN)
+	    // Not even finished with initializations and already out of
+	    // memory?  Then nothing is going to work, exit.
+	    mch_exit(123);
     }
 }
 
diff --git a/src/version.c b/src/version.c
index 14a9528..0689e03 100644
--- a/src/version.c
+++ b/src/version.c
@@ -766,6 +766,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1898,
+/**/
     1897,
 /**/
     1896,