commit https://github.com/vim/vim/commit/6100d02aab7c8294b581cb299250eea164b50e9d Author: Bram Moolenaar <Bram@vim.org> Date: Sun Oct 2 16:51:57 2016 +0200 patch 8.0.0020 Problem: The regexp engines are not reentrant. Solution: Add regexec_T and save/restore the state when needed.

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")