patch 8.2.1984: cannot use :vimgrep in omni completion

Problem:    Cannot use :vimgrep in omni completion, causing C completion to
            fail.
Solution:   Add the EX_LOCK_OK flag to :vimgrep. (closes #7292)
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 4fe62ca..8873484 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -929,10 +929,10 @@
 	EX_RANGE|EX_FILE1|EX_NEEDARG|EX_CMDWIN|EX_LOCK_OK|EX_RESTRICT,
 	ADDR_LINES),
 EXCMD(CMD_lvimgrep,	"lvimgrep",	ex_vimgrep,
-	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE,
+	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE|EX_LOCK_OK,
 	ADDR_OTHER),
 EXCMD(CMD_lvimgrepadd,	"lvimgrepadd",	ex_vimgrep,
-	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE,
+	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE|EX_LOCK_OK,
 	ADDR_OTHER),
 EXCMD(CMD_lwindow,	"lwindow",	ex_cwindow,
 	EX_RANGE|EX_COUNT|EX_TRLBAR,
@@ -1673,10 +1673,10 @@
 	EX_BANG|EX_FILE1|EX_CMDARG|EX_ARGOPT|EX_TRLBAR,
 	ADDR_NONE),
 EXCMD(CMD_vimgrep,	"vimgrep",	ex_vimgrep,
-	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE,
+	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE|EX_LOCK_OK,
 	ADDR_OTHER),
 EXCMD(CMD_vimgrepadd,	"vimgrepadd",	ex_vimgrep,
-	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE,
+	EX_RANGE|EX_BANG|EX_NEEDARG|EX_EXTRA|EX_NOTRLCOM|EX_TRLBAR|EX_XFILE|EX_LOCK_OK,
 	ADDR_OTHER),
 EXCMD(CMD_vim9script,	"vim9script",	ex_vim9script,
 	EX_CMDWIN|EX_LOCK_OK,
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 395ecc6..cbdc610 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -3091,6 +3091,66 @@
   endtry
 endfunc
 
+func Test_vimgrep_with_textlock()
+  new
+
+  " Simple way to execute something with "textwinlock" set.
+  " Check that vimgrep without jumping can be executed.
+  au InsertCharPre * vimgrep /RunTheTest/j runtest.vim
+  normal ax
+  let qflist = getqflist()
+  call assert_true(len(qflist) > 0)
+  call assert_match('RunTheTest', qflist[0].text)
+  call setqflist([], 'r')
+  au! InsertCharPre
+
+  " Check that vimgrepadd without jumping can be executed.
+  au InsertCharPre * vimgrepadd /RunTheTest/j runtest.vim
+  normal ax
+  let qflist = getqflist()
+  call assert_true(len(qflist) > 0)
+  call assert_match('RunTheTest', qflist[0].text)
+  call setqflist([], 'r')
+  au! InsertCharPre
+
+  " Check that lvimgrep without jumping can be executed.
+  au InsertCharPre * lvimgrep /RunTheTest/j runtest.vim
+  normal ax
+  let qflist = getloclist(0)
+  call assert_true(len(qflist) > 0)
+  call assert_match('RunTheTest', qflist[0].text)
+  call setloclist(0, [], 'r')
+  au! InsertCharPre
+
+  " Check that lvimgrepadd without jumping can be executed.
+  au InsertCharPre * lvimgrepadd /RunTheTest/j runtest.vim
+  normal ax
+  let qflist = getloclist(0)
+  call assert_true(len(qflist) > 0)
+  call assert_match('RunTheTest', qflist[0].text)
+  call setloclist(0, [], 'r')
+  au! InsertCharPre
+
+  " trying to jump will give an error
+  au InsertCharPre * vimgrep /RunTheTest/ runtest.vim
+  call assert_fails('normal ax', 'E565:')
+  au! InsertCharPre
+
+  au InsertCharPre * vimgrepadd /RunTheTest/ runtest.vim
+  call assert_fails('normal ax', 'E565:')
+  au! InsertCharPre
+
+  au InsertCharPre * lvimgrep /RunTheTest/ runtest.vim
+  call assert_fails('normal ax', 'E565:')
+  au! InsertCharPre
+
+  au InsertCharPre * lvimgrepadd /RunTheTest/ runtest.vim
+  call assert_fails('normal ax', 'E565:')
+  au! InsertCharPre
+
+  bwipe!
+endfunc
+
 " Tests for the quickfix buffer b:changedtick variable
 func Xchangedtick_tests(cchar)
   call s:setup_commands(a:cchar)
diff --git a/src/version.c b/src/version.c
index 43cd9cb..8d21a4a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1984,
+/**/
     1983,
 /**/
     1982,