patch 8.1.0960: when using ConPTY garbage collection has undefined behavior commit https://github.com/vim/vim/commit/8caa43d8159555076af6acc242185f5475c1d199 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 20 22:45:06 2019 +0100 patch 8.1.0960: when using ConPTY garbage collection has undefined behavior Problem: When using ConPTY garbage collection has undefined behavior. Solution: Free the channel in a better way. (Nobuhiro Takasaki, closes https://github.com/vim/vim/issues/4020)