vim-patch:8.0.1423: error in return not caught by try/catch

Problem:    Error in return not caught by try/catch.
Solution:   Call update_force_abort(). (Yasuhiro Matsomoto, closes vim/vim#2483)
fabaf753e2

src/nvim/eval.c

@@ -21800,6 +21800,9 @@ void ex_return(exarg_T *eap)
   }
   /* It's safer to return also on error. */
   else if (!eap->skip) {
+    // In return statement, cause_abort should be force_abort.
+    update_force_abort();
+
     /*
      * Return unless the expression evaluation has been cancelled due to an
      * aborting error, an interrupt, or an exception.

src/nvim/testdir/test_eval_stuff.vim

@@ -0,0 +1,13 @@
+" Tests for various eval things.
+
+function s:foo() abort
+  try
+    return [] == 0
+  catch
+    return 1
+  endtry
+endfunction
+
+func Test_catch_return_with_error()
+  call assert_equal(1, s:foo())
+endfunc