commit https://github.com/vim/vim/commit/c7f0ebc6d1e1cdaed816b88a0d6092c5ace615eb Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 27 21:10:09 2016 +0100 patch 7.4.1438 Problem: Can't get buffer number of a channel. Solution: Add ch_getbufnr().

Tests for file with some lines ending in CTRL-M, some not

STARTTEST
:set ta tx
:e!
:$-3,$w! test.out
:qa!
ENDTEST

this lines ends in a
this one doesn't
this one does
and the last one doesn't