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fix #1027: :wundo segfault in new, non-empty buffer

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This commit is contained in:
Justin M. Keyes 2014-10-26 20:03:02 +00:00
parent 3fc542b45b
commit 49d5ed5591
2 changed files with 24 additions and 3 deletions
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7
src/nvim/undo.c
View File

@ -1009,7 +1009,7 @@ void u_write_undo(char_u *name, int forceit, buf_T *buf, char_u *hash)
int fd;
FILE *fp = NULL;
int perm;
int write_ok = FALSE;
bool write_ok = false;
if (name == NULL) {
file_name = u_get_undo_file_name(buf->b_ffname, FALSE);
@ -1116,7 +1116,8 @@ void u_write_undo(char_u *name, int forceit, buf_T *buf, char_u *hash)
*/
FileInfo file_info_old;
FileInfo file_info_new;
if (os_fileinfo((char *)buf->b_ffname, &file_info_old)
if (buf->b_ffname != NULL
&& os_fileinfo((char *)buf->b_ffname, &file_info_old)
&& os_fileinfo((char *)file_name, &file_info_new)
&& file_info_old.stat.st_gid != file_info_new.stat.st_gid
&& os_fchown(fd, -1, file_info_old.stat.st_gid) != 0) {
@ -1177,7 +1178,7 @@ void u_write_undo(char_u *name, int forceit, buf_T *buf, char_u *hash)
}
if (put_bytes(fp, (long_u)UF_HEADER_END_MAGIC, 2) == OK)
write_ok = TRUE;
write_ok = true;
#ifdef U_DEBUG
if (headers_written != buf->b_u_numhead) {
EMSGN("Written %" PRId64 " headers, ...", headers_written);

20
test/functional/ex_cmds/wundo_spec.lua Normal file
View File

@ -0,0 +1,20 @@
-- Specs for
-- :wundo
local helpers = require('test.functional.helpers')
local execute, eq, clear, eval, feed =
helpers.execute, helpers.eq, helpers.clear, helpers.eval, helpers.feed
describe(':wundo', function()
before_each(clear)
it('safely fails on new, non-empty buffer', function()
feed('iabc<esc>')
execute('wundo foo') -- This should not segfault. #1027
--TODO: check messages for error message
os.remove(eval('getcwd()') .. '/foo') --cleanup
end)
end)