# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1648987203 -7200
# Node ID aa533dc41223a08ac40ac21cb0e8f53103d1cd20
# Parent  5143c731bd61113d36a3ef3ae516be5fd8db4de9
patch 8.2.4672: using :normal with Ex mode may make :substitute hang

Commit: https://github.com/vim/vim/commit/ce416b453a849c837f9f6ffc91dd4792d84e1bfd
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sun Apr 3 12:59:34 2022 +0100

    patch 8.2.4672: using :normal with Ex mode may make :substitute hang

    Problem:    Using :normal with Ex mode may make :substitute hang.
    Solution:   When getting an empty line behave like 'q' was typed.
                (closes #10070)

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -4233,6 +4233,11 @@ ex_substitute(exarg_T *eap)
 			    {
 				typed = *resp;
 				vim_free(resp);
+				// When ":normal" runs out of characters we get
+				// an empty line.  Use "q" to get out of the
+				// loop.
+				if (ex_normal_busy && typed == NUL)
+				    typed = 'q';
 			    }
 			}
 			else
diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -2641,6 +2641,15 @@ func Test_normal33_g_cmd2()
   bw!
 endfunc
 
+func Test_normal_ex_substitute()
+  " This was hanging on the substitute prompt.
+  new
+  call setline(1, 'a')
+  exe "normal! gggQs/a/b/c\<CR>"
+  call assert_equal('a', getline(1))
+  bwipe!
+endfunc
+
 " Test for g CTRL-G
 func Test_g_ctrl_g()
   new
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4672,
+/**/
     4671,
 /**/
     4670,