fix(fileio): copy to correct buffer position when reading

fixes #29186 (likely)

fixup for #29093 064483a2b

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nvim/os/fileio.c b/src/nvim/os/fileio.c
index c87b2d359f..5f372b2376 100644
--- a/src/nvim/os/fileio.c
+++ b/src/nvim/os/fileio.c
@@ -300,7 +300,7 @@ ptrdiff_t file_read(FileDescriptor *const fp, char *const ret_buf, const size_t
     } else {
       fp->write_pos += r_ret;
       size_t to_copy = MIN((size_t)r_ret, read_remaining);
-      memcpy(ret_buf, fp->read_pos, to_copy);
+      memcpy(buf, fp->read_pos, to_copy);
       fp->read_pos += to_copy;
       read_remaining -= to_copy;
     }