commit https://github.com/vim/vim/commit/c8dcbb12c5d7f3eb0c334daebb4475bb015b91e7 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 25 23:10:17 2016 +0100 patch 7.4.1421 Problem: May free a channel when a callback may need to be invoked. Solution: Keep the channel when refcount is zero.

/* if_tcl.c */
void vim_tcl_init(char *arg);
int tcl_enabled(int verbose);
void tcl_end(void);
void ex_tcl(exarg_T *eap);
void ex_tclfile(exarg_T *eap);
void ex_tcldo(exarg_T *eap);
void tcl_buffer_free(buf_T *buf);
void tcl_window_free(win_T *win);
/* vim: set ft=c : */