patch 9.0.0332: overwrite check may block BufWriteCmd
Problem: Overwrite check may block BufWriteCmd.
Solution: Do not use overwrite check when 'buftype' is "acwrite".
(closes #11011)
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index d9f1c99..1cf090c 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2094,12 +2094,17 @@
/*
* Write to another file or b_flags set or not writing the whole file:
* overwriting only allowed with '!'.
+ * If "other" is FALSE and bt_nofilename(buf) is TRUE, this must be
+ * writing an "acwrite" buffer to the same file as its b_ffname, and
+ * buf_write() will only allow writing with BufWriteCmd autocommands,
+ * so there is no need for an overwrite check.
*/
if ( (other
- || (buf->b_flags & BF_NOTEDITED)
- || ((buf->b_flags & BF_NEW)
- && vim_strchr(p_cpo, CPO_OVERNEW) == NULL)
- || (buf->b_flags & BF_READERR))
+ || (!bt_nofilename(buf)
+ && ((buf->b_flags & BF_NOTEDITED)
+ || ((buf->b_flags & BF_NEW)
+ && vim_strchr(p_cpo, CPO_OVERNEW) == NULL)
+ || (buf->b_flags & BF_READERR))))
&& !p_wa
&& vim_fexists(ffname))
{