patch 7.4.1656
Problem:    Crash when using partial with a timer.
Solution:   Increment partial reference count. (Hirohito Higashi)
diff --git a/src/testdir/test_timers.vim b/src/testdir/test_timers.vim
index 9f58a35..7ef51e5 100644
--- a/src/testdir/test_timers.vim
+++ b/src/testdir/test_timers.vim
@@ -30,3 +30,16 @@
   call assert_true(s:val > 1)
   call assert_true(s:val < 5)
 endfunc
+
+func Test_with_partial_callback()
+  let s:val = 0
+  let s:meow = {}
+  function s:meow.bite(...)
+    let s:val += 1
+  endfunction
+
+  call timer_start(50, s:meow.bite)
+  sleep 200m
+  call assert_equal(1, s:val)
+endfunc
+" vim: ts=2 sw=0 et