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 #2483)

src/Makefile

@@ -2147,6 +2147,7 @@ test_arglist \
 	test_edit \
 	test_erasebackword \
 	test_escaped_glob \
+	test_eval_stuff \
 	test_ex_undo \
 	test_ex_z \
 	test_exec_while_if \

src/testdir/Make_all.mak

@@ -94,6 +94,7 @@ NEW_TESTS = test_arabic.res \
 	    test_edit.res \
 	    test_erasebackword.res \
 	    test_escaped_glob.res \
+	    test_eval_stuff.res \
 	    test_exec_while_if.res \
 	    test_exists.res \
 	    test_exists_autocmd.res \

src/testdir/test_eval.in

@@ -1,5 +1,7 @@
 Test for various eval features.   vim: set ft=vim :
 
+NOTE: Do not add more here, use new style test test_eval_stuff.vim
+
 Note: system clipboard is saved, changed and restored.
 
 clipboard contents
@@ -134,10 +136,10 @@ if has('clipboard')
 let _clipreg = ['*', getreg('*'), getregtype('*')]
 let _clipopt = &cb
 let &cb='unnamed'
-5y
+7y
 AR *
 tabdo :windo :echo "hi"
-6y
+8y
 AR *
 let &cb=_clipopt
 call call('setreg', _clipreg)

src/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

src/userfunc.c

@@ -2972,6 +2972,9 @@ 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/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1423,
 /**/
     1422,
 /**/