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committed 54a94951231xxxxxxxxxxFrom https://ftp.gnu.org/gnu/bash/bash-4.4-patches/bash44-012Signed-off-by: Peter Korsgaard <peter@korsgaard.com> BASH PATCH REPORT =================Bash-Release: 4.4Patch-ID: bash44-012Bug-Reported-by: Clark Wang <dearvoid@gmail.com>Bug-Reference-ID: <CADv8-ojttPUFOZXqbjsvy83LfaJtQKZ5qejGdF6j0VJ3vtrYOA@mail.gmail.com>Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2016-11/msg00106.htmlBug-Description:When -N is used, the input is not supposed to be split using $IFS, butleading and trailing IFS whitespace was still removed.Patch (apply with `patch -p0'):*** bash-4.4-patched/subst.c 2017-01-20 14:22:01.000000000 -0500--- b/subst.c 2017-01-25 13:43:22.000000000 -0500****************** 2826,2834 **** /* Parse a single word from STRING, using SEPARATORS to separate fields. ENDPTR is set to the first character after the word. This is used by! the `read' builtin. This is never called with SEPARATORS != $IFS;! it should be simplified. XXX - this function is very similar to list_string; they should be combined - XXX */ char * get_word_from_string (stringp, separators, endptr)--- b/2826,2838 ---- /* Parse a single word from STRING, using SEPARATORS to separate fields. ENDPTR is set to the first character after the word. This is used by! the `read' builtin.! ! This is never called with SEPARATORS != $IFS, and takes advantage of that. XXX - this function is very similar to list_string; they should be combined - XXX */+ + #define islocalsep(c) (local_cmap[(unsigned char)(c)] != 0)+ char * get_word_from_string (stringp, separators, endptr)****************** 2838,2841 ****--- b/2842,2846 ---- char *current_word; int sindex, sh_style_split, whitesep, xflags;+ unsigned char local_cmap[UCHAR_MAX+1]; /* really only need single-byte chars here */ size_t slen;****************** 2847,2854 **** separators[2] == '\n' && separators[3] == '\0';! for (xflags = 0, s = ifs_value; s && *s; s++) { if (*s == CTLESC) xflags |= SX_NOCTLESC;