diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 722e05d7a1..c6b248d39f 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -6138,6 +6138,8 @@ mkdir({name} [, {path} [, {prot}]])
 		Example: >
 			:call mkdir($HOME . "/tmp/foo/bar", "p", 0700)
 <		This function is not available in the |sandbox|.
+		There is no error if the directory already exists and the "p"
+		flag is passed (since patch 8.0.1708).
 		Not available on all systems.  To check use: >
 			:if exists("*mkdir")
 <
@@ -8400,6 +8402,24 @@ term_setansicolors({buf}, {colors})			*term_setansicolors()*
 		color codes, like those accepted by |highlight-guifg|.
 		Also see |term_getansicolors()| and |g:terminal_ansi_colors|.
 
+		The colors normally are:
+			0    black
+			1    dark red
+			2    dark green
+			3    brown
+			4    dark blue
+			5    dark magenta
+			6    dark cyan
+			7    light grey
+			8    dark grey
+			9    red
+			10   green
+			11   yellow
+			12   blue
+			13   magenta
+			14   cyan
+			15   white
+
 		These colors are used in the GUI and in the terminal when
 		'termguicolors' is set.  When not using GUI colors (GUI mode
 		or |termguicolors|), the terminal window always uses the 16
@@ -8429,8 +8449,15 @@ term_setrestore({buf}, {command})			*term_setrestore()*
 		Use "NONE" to not restore this window.
 		{only available when compiled with the |+terminal| feature}
 
-term_setsize({buf}, {expr})				*term_setsize()*
-		Not implemented yet.
+term_setsize({buf}, {rows}, {cols})			*term_setsize()*
+		Set the size of terminal {buf}. The size of the window
+		containing the terminal will also be adjusted, if possible.
+		If {rows} or {cols} is zero or negative, that dimension is not
+		changed.
+
+		{buf} must be the buffer number of a terminal window.  Use an
+		empty string for the current buffer.  If the buffer does not
+		exist or is not a terminal window, an error is given.
 		{only available when compiled with the |+terminal| feature}
 
 term_start({cmd}, {options})				*term_start()*
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 07e373cca4..92595690f6 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 8.0.  Last change: 2018 Mar 13
+*options.txt*	For Vim version 8.0.  Last change: 2018 Apr 14
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -8097,6 +8097,16 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Note that the "cterm" attributes are still used, not the "gui" ones.
 	NOTE: This option is reset when 'compatible' is set.
 
+						*'terminalscroll'* *'tlsl'*
+'terminalscroll' 'tlsl'	number	(default 10000)
+			global
+			{not in Vi}
+			{not available when compiled without the
+			|+terminal| feature}
+	Number of scrollback lines to keep.  When going over this limit the
+	first 10% of the scrollback lines are deleted.  This is just to reduce
+	the memory usage.  See |Terminal-Normal|.
+
 						*'termkey'* *'tk'*
 'termkey' 'tk'		string	(default "")
 			local to window
diff --git a/runtime/doc/terminal.txt b/runtime/doc/terminal.txt
index 551a3740c2..8deba3922d 100644
--- a/runtime/doc/terminal.txt
+++ b/runtime/doc/terminal.txt
@@ -72,6 +72,7 @@ See |CTRL-W| for more commands.
 
 Special in the terminal window:			*CTRL-W_.*  *CTRL-W_N* 
 	CTRL-W .	send a CTRL-W to the job in the terminal
+	CTRL-W CTRL-\	send a CTRL-\ to the job in the terminal
 	CTRL-W N	go to Terminal-Normal mode, see |Terminal-mode|
 	CTRL-\ CTRL-N   go to Terminal-Normal mode, see |Terminal-mode|
 	CTRL-W " {reg}  paste register {reg}		*CTRL-W_quote*
@@ -287,7 +288,7 @@ not when 'termsize' is "rowsXcols".
 
 
 Terminal-Job and Terminal-Normal mode ~
-							*Terminal-mode*
+						*Terminal-mode* *Terminal-Job*
 When the job is running the contents of the terminal is under control of the
 job.  That includes the cursor position.  Typed keys are sent to the job.
 The terminal contents can change at any time.  This is called Terminal-Job
@@ -300,7 +301,9 @@ suspended.  CTRL-\ CTRL-N does the same.
 Terminal-Job mode is where |:tmap| mappings are applied. Keys sent by
 |term_sendkeys()| are not subject to tmap, but keys from |feedkeys()| are.
 
-							*E946*
+It is not possible to enter Insert mode from Terminal-Job mode.
+
+						*Terminal-Normal* *E946*
 In Terminal-Normal mode you can move the cursor around with the usual Vim
 commands, Visually mark text, yank text, etc.  But you cannot change the
 contents of the buffer.  The commands that would start insert mode, such as
@@ -311,7 +314,10 @@ In Terminal-Normal mode the statusline and window title show "(Terminal)".  If
 the job ends while in Terminal-Normal mode this changes to
 "(Terminal-finished)".
 
-It is not possible to enter Insert mode from Terminal-Job mode.
+When the job outputs lines in the terminal, such that the contents scrolls off
+the top, those lines are remembered and can be seen in Terminal-Normal mode.
+The number of lines is limited by the 'terminalscroll' option. When going over
+this limit, the first 10% of the scrolled lins are deleted and are lost.
 
 
 Cursor style ~
@@ -643,6 +649,13 @@ the same as any command running in a terminal window.
 When the debugger ends, typically by typing "quit" in the gdb window, the two
 opened windows are closed.
 
+Only one debugger can be active at a time.
+
+To attach gdb to an already running executable, or use a core file, pass extra
+arguments.  E.g.: >
+	:Termdebug vim core
+	:Termdebug vim 98343
+
 
 Example session ~
 							*termdebug-example*
diff --git a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
index 256f7ef60c..ded114a2d7 100644
--- a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
+++ b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
@@ -25,7 +25,7 @@ endif
 
 " The command that starts debugging, e.g. ":Termdebug vim".
 " To end type "quit" in the gdb window.
-command -nargs=* -complete=file Termdebug call s:StartDebug(<q-args>)
+command -nargs=* -complete=file Termdebug call s:StartDebug(<f-args>)
 
 " Name of the gdb command, defaults to "gdb".
 if !exists('termdebugger')
@@ -43,7 +43,12 @@ else
 endif
 hi default debugBreakpoint term=reverse ctermbg=red guibg=red
 
-func s:StartDebug(cmd)
+func s:StartDebug(...)
+  if exists('s:gdbwin')
+    echoerr 'Terminal debugger already running'
+    return
+  endif
+
   let s:startwin = win_getid(winnr())
   let s:startsigncolumn = &signcolumn
 
@@ -90,7 +95,7 @@ func s:StartDebug(cmd)
 
   " Open a terminal window to run the debugger.
   " Add -quiet to avoid the intro message causing a hit-enter prompt.
-  let cmd = [g:termdebugger, '-quiet', '-tty', pty, a:cmd]
+  let cmd = [g:termdebugger, '-quiet', '-tty', pty] + a:000
   echomsg 'executing "' . join(cmd) . '"'
   let s:gdbbuf = term_start(cmd, {
 	\ 'exit_cb': function('s:EndDebug'),
@@ -112,7 +117,7 @@ func s:StartDebug(cmd)
   let try_count = 0
   while 1
     let response = ''
-    for lnum in range(1,20)
+    for lnum in range(1,200)
       if term_getline(s:gdbbuf, lnum) =~ 'new-ui mi '
 	let response = term_getline(s:gdbbuf, lnum + 1)
 	if response =~ 'Undefined command'
@@ -182,6 +187,7 @@ endfunc
 func s:EndDebug(job, status)
   exe 'bwipe! ' . s:ptybuf
   exe 'bwipe! ' . s:commbuf
+  unlet s:gdbwin
 
   let curwinid = win_getid(winnr())
 
@@ -295,6 +301,7 @@ func s:DeleteCommands()
   delcommand Evaluate
   delcommand Gdb
   delcommand Program
+  delcommand Source
   delcommand Winbar
 
   nunmap K
diff --git a/src/auto/configure b/src/auto/configure
index 3beb0bfc6b..60a933ba37 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -3447,6 +3447,97 @@ ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
+$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
+if ${ac_cv_prog_cc_c89+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not '\xHH' hex character constants.
+   These don't provoke an error unfortunately, instead are silently treated
+   as 'x'.  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
+   array size at least.  It's necessary to write '\x00'==0 to get something
+   that's true only with -std.  */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) 'x'
+int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
+	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c89" in
+  x)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+  xno)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+  *)
+    CC="$CC $ac_cv_prog_cc_c89"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
+
+fi
+
 		ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -4113,6 +4204,8 @@ if test "$GCC" = yes; then
       CFLAGS="$CFLAGS -fno-strength-reduce"
     fi
   fi
+
+    CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700"
 fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for clang version" >&5
@@ -4185,7 +4278,7 @@ if test "`(uname) 2>/dev/null`" = Darwin; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
   MACOS_X=yes
-  CPPFLAGS="$CPPFLAGS -DMACOS_X"
+  CPPFLAGS="$CPPFLAGS -D_DARWIN_C_SOURCE -DMACOS_X"
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking --disable-darwin argument" >&5
 $as_echo_n "checking --disable-darwin argument... " >&6; }
@@ -14473,6 +14566,10 @@ if test "$zOSUnix" = "yes"; then
 	CFLAGS="-D_ALL_SOURCE -Wc,float\(ieee\),dll"
 fi
 
+if test "$GCC" = yes -a "$GUITYPE" != "GTK" -a "X$RUBY_CFLAGS" = "X"; then
+  CFLAGS="$CFLAGS -ansi"
+fi
+
 ac_config_files="$ac_config_files auto/config.mk:config.mk.in"
 
 cat >confcache <<\_ACEOF
diff --git a/src/channel.c b/src/channel.c
index 79976cd9e2..5d7a95f9e6 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -691,9 +691,9 @@ channel_open(
     {
 	char		*p;
 
-	/* When using host->h_addr directly ubsan warns for it to not be
-	 * aligned.  First copy the pointer to aviod that. */
-	memcpy(&p, &host->h_addr, sizeof(p));
+	/* When using host->h_addr_list[0] directly ubsan warns for it to not
+	 * be aligned.  First copy the pointer to avoid that. */
+	memcpy(&p, &host->h_addr_list[0], sizeof(p));
 	memcpy((char *)&server.sin_addr, p, host->h_length);
     }
 
diff --git a/src/configure.ac b/src/configure.ac
index 9bb3f0d3ea..53b64e83b3 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -11,7 +11,7 @@ AC_DEFINE(UNIX)
 AC_PROG_MAKE_SET
 
 dnl Checks for programs.
-AC_PROG_CC		dnl required by almost everything
+AC_PROG_CC_C89		dnl required by almost everything
 AC_PROG_CPP		dnl required by header file checks
 AC_PROGRAM_EGREP	dnl required by AC_EGREP_CPP
 AC_PROG_FGREP		dnl finds working grep -F
@@ -61,6 +61,9 @@ if test "$GCC" = yes; then
       CFLAGS="$CFLAGS -fno-strength-reduce"
     fi
   fi
+
+  dnl Declare what standards the code should comply with
+  CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700"
 fi
 
 dnl clang-500.2.75 or around has abandoned -f[no-]strength-reduce and issues a
@@ -135,7 +138,7 @@ AC_MSG_CHECKING([for Darwin (Mac OS X)])
 if test "`(uname) 2>/dev/null`" = Darwin; then
   AC_MSG_RESULT(yes)
   MACOS_X=yes
-  CPPFLAGS="$CPPFLAGS -DMACOS_X"
+  CPPFLAGS="$CPPFLAGS -D_DARWIN_C_SOURCE -DMACOS_X"
 
   AC_MSG_CHECKING(--disable-darwin argument)
   AC_ARG_ENABLE(darwin,
@@ -4500,6 +4503,13 @@ if test "$zOSUnix" = "yes"; then
 	CFLAGS="-D_ALL_SOURCE -Wc,float\(ieee\),dll"
 fi
 
+dnl Declare what standards the code should comply with.
+dnl But not when using GTK, the header files cause all kinds of warnings.
+dnl But not when using Ruby, it needs "inline".
+if test "$GCC" = yes -a "$GUITYPE" != "GTK" -a "X$RUBY_CFLAGS" = "X"; then
+  CFLAGS="$CFLAGS -ansi"
+fi
+
 dnl write output files
 AC_OUTPUT(auto/config.mk:config.mk.in)
 
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 65162dbbda..febe4afa27 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -876,6 +876,7 @@ static struct fst
 # endif
     {"term_setkill",	2, 2, f_term_setkill},
     {"term_setrestore",	2, 2, f_term_setrestore},
+    {"term_setsize",	3, 3, f_term_setsize},
     {"term_start",	1, 2, f_term_start},
     {"term_wait",	1, 2, f_term_wait},
 #endif
@@ -8076,22 +8077,32 @@ f_mkdir(typval_T *argvars, typval_T *rettv)
 
     dir = get_tv_string_buf(&argvars[0], buf);
     if (*dir == NUL)
-	rettv->vval.v_number = FAIL;
-    else
-    {
-	if (*gettail(dir) == NUL)
-	    /* remove trailing slashes */
-	    *gettail_sep(dir) = NUL;
+	return;
 
-	if (argvars[1].v_type != VAR_UNKNOWN)
+    if (*gettail(dir) == NUL)
+	/* remove trailing slashes */
+	*gettail_sep(dir) = NUL;
+
+    if (argvars[1].v_type != VAR_UNKNOWN)
+    {
+	if (argvars[2].v_type != VAR_UNKNOWN)
 	{
-	    if (argvars[2].v_type != VAR_UNKNOWN)
-		prot = (int)get_tv_number_chk(&argvars[2], NULL);
-	    if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
-		mkdir_recurse(dir, prot);
+	    prot = (int)get_tv_number_chk(&argvars[2], NULL);
+	    if (prot == -1)
+		return;
+	}
+	if (STRCMP(get_tv_string(&argvars[1]), "p") == 0)
+	{
+	    if (mch_isdir(dir))
+	    {
+		/* With the "p" flag it's OK if the dir already exists. */
+		rettv->vval.v_number = OK;
+		return;
+	    }
+	    mkdir_recurse(dir, prot);
 	}
-	rettv->vval.v_number = prot == -1 ? FAIL : vim_mkdir_emsg(dir, prot);
     }
+    rettv->vval.v_number = vim_mkdir_emsg(dir, prot);
 }
 #endif
 
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index bb679bd975..9c7e8d5648 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -5607,15 +5607,17 @@ gui_mch_free_font(GuiFont font)
     guicolor_T
 gui_mch_get_color(char_u *name)
 {
+    guicolor_T color = INVALCOLOR;
+
     if (!gui.in_use)		/* can't do this when GUI not running */
-	return INVALCOLOR;
+	return color;
+
+    if (name != NULL)
+	color = gui_get_color_cmn(name);
 
 #if GTK_CHECK_VERSION(3,0,0)
-    return name != NULL ? gui_get_color_cmn(name) : INVALCOLOR;
+    return color;
 #else
-    guicolor_T color;
-
-    color = (name != NULL) ? gui_get_color_cmn(name) : INVALCOLOR;
     if (color == INVALCOLOR)
 	return INVALCOLOR;
 
diff --git a/src/if_python3.c b/src/if_python3.c
index b885deb049..4360fe45c5 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -815,7 +815,7 @@ python3_end(void)
 #endif
     if (Py_IsInitialized())
     {
-	// acquire lock before finalizing
+	/* acquire lock before finalizing */
 	PyGILState_Ensure();
 
 	Py_Finalize();
diff --git a/src/option.c b/src/option.c
index bfc422f8e0..1bf1dbc018 100644
--- a/src/option.c
+++ b/src/option.c
@@ -2824,6 +2824,15 @@ static struct vimoption options[] =
 #else
 			    (char_u*)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)FALSE}
+#endif
+			    SCRIPTID_INIT},
+    {"terminalscroll", "tlsl", P_NUM|P_VI_DEF|P_VIM|P_RBUF,
+#ifdef FEAT_TERMINAL
+			    (char_u *)&p_tlsl, PV_NONE,
+			    {(char_u *)10000L, (char_u *)10000L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)NULL, (char_u *)0L}
 #endif
 			    SCRIPTID_INIT},
     {"termkey", "tk",	    P_STRING|P_ALLOCED|P_RWIN|P_VI_DEF,
diff --git a/src/option.h b/src/option.h
index 55f1bf2f11..e12b66c942 100644
--- a/src/option.h
+++ b/src/option.h
@@ -868,6 +868,9 @@ EXTERN char_u	*p_tcldll;	/* 'tcldll' */
 #ifdef FEAT_ARABIC
 EXTERN int	p_tbidi;	/* 'termbidi' */
 #endif
+#ifdef FEAT_TERMINAL
+EXTERN long	p_tlsl;		/* 'terminalscroll' */
+#endif
 #ifdef FEAT_MBYTE
 EXTERN char_u	*p_tenc;	/* 'termencoding' */
 #endif
diff --git a/src/proto/terminal.pro b/src/proto/terminal.pro
index f7cea5a161..78b640f7a5 100644
--- a/src/proto/terminal.pro
+++ b/src/proto/terminal.pro
@@ -32,19 +32,20 @@ int term_swap_diff(void);
 void f_term_dumpdiff(typval_T *argvars, typval_T *rettv);
 void f_term_dumpload(typval_T *argvars, typval_T *rettv);
 void f_term_getaltscreen(typval_T *argvars, typval_T *rettv);
-void f_term_getansicolors(typval_T *argvars, typval_T *rettv);
 void f_term_getattr(typval_T *argvars, typval_T *rettv);
 void f_term_getcursor(typval_T *argvars, typval_T *rettv);
 void f_term_getjob(typval_T *argvars, typval_T *rettv);
 void f_term_getline(typval_T *argvars, typval_T *rettv);
 void f_term_getscrolled(typval_T *argvars, typval_T *rettv);
 void f_term_getsize(typval_T *argvars, typval_T *rettv);
+void f_term_setsize(typval_T *argvars, typval_T *rettv);
 void f_term_getstatus(typval_T *argvars, typval_T *rettv);
 void f_term_gettitle(typval_T *argvars, typval_T *rettv);
 void f_term_gettty(typval_T *argvars, typval_T *rettv);
 void f_term_list(typval_T *argvars, typval_T *rettv);
 void f_term_scrape(typval_T *argvars, typval_T *rettv);
 void f_term_sendkeys(typval_T *argvars, typval_T *rettv);
+void f_term_getansicolors(typval_T *argvars, typval_T *rettv);
 void f_term_setansicolors(typval_T *argvars, typval_T *rettv);
 void f_term_setrestore(typval_T *argvars, typval_T *rettv);
 void f_term_setkill(typval_T *argvars, typval_T *rettv);
diff --git a/src/screen.c b/src/screen.c
index 5d3c1c1a5a..219ae4bf3a 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -8735,7 +8735,8 @@ screen_fill(
 	if (row == Rows - 1)		/* overwritten the command line */
 	{
 	    redraw_cmdline = TRUE;
-	    if (c1 == ' ' && c2 == ' ')
+	    if (start_col == 0 && end_col == Columns
+		    && c1 == ' ' && c2 == ' ' && attr == 0)
 		clear_cmdline = FALSE;	/* command line has been cleared */
 	    if (start_col == 0)
 		mode_displayed = FALSE; /* mode cleared or overwritten */
diff --git a/src/terminal.c b/src/terminal.c
index 1d946ada7a..b62d27c192 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -40,9 +40,6 @@
  * TODO:
  * - Win32: Make terminal used for :!cmd in the GUI work better.  Allow for
  *   redirection.  Probably in call to channel_set_pipes().
- * - implement term_setsize()
- * - add an optional limit for the scrollback size.  When reaching it remove
- *   10% at the start.
  * - Copy text in the vterm to the Vim buffer once in a while, so that
  *   completion works.
  * - in GUI vertical split causes problems.  Cursor is flickering. (Hirohito
@@ -2061,6 +2058,11 @@ terminal_loop(int blocking)
 		/* "CTRL-W .": send CTRL-W to the job */
 		c = Ctrl_W;
 	    }
+	    else if (termkey == 0 && c == Ctrl_BSL)
+	    {
+		/* "CTRL-W CTRL-\": send CTRL-\ to the job */
+		c = Ctrl_BSL;
+	    }
 	    else if (c == 'N')
 	    {
 		/* CTRL-W N : go to Terminal-Normal mode. */
@@ -2178,7 +2180,7 @@ color2index(VTermColor *color, int fg, int *boldp)
 	    case  2: return lookup_color( 4, fg, boldp) + 1; /* dark red */
 	    case  3: return lookup_color( 2, fg, boldp) + 1; /* dark green */
 	    case  4: return lookup_color( 6, fg, boldp) + 1; /* brown */
-	    case  5: return lookup_color( 1, fg, boldp) + 1; /* dark blue*/
+	    case  5: return lookup_color( 1, fg, boldp) + 1; /* dark blue */
 	    case  6: return lookup_color( 5, fg, boldp) + 1; /* dark magenta */
 	    case  7: return lookup_color( 3, fg, boldp) + 1; /* dark cyan */
 	    case  8: return lookup_color( 8, fg, boldp) + 1; /* light grey */
@@ -2519,7 +2521,27 @@ handle_pushline(int cols, const VTermScreenCell *cells, void *user)
 {
     term_T	*term = (term_T *)user;
 
-    /* TODO: Limit the number of lines that are stored. */
+    /* If the number of lines that are stored goes over 'termscrollback' then
+     * delete the first 10%. */
+    if (term->tl_scrollback.ga_len > p_tlsl)
+    {
+	int	todo = p_tlsl / 10;
+	int	i;
+
+	curbuf = term->tl_buffer;
+	for (i = 0; i < todo; ++i)
+	{
+	    vim_free(((sb_line_T *)term->tl_scrollback.ga_data + i)->sb_cells);
+	    ml_delete(1, FALSE);
+	}
+	curbuf = curwin->w_buffer;
+
+	term->tl_scrollback.ga_len -= todo;
+	mch_memmove(term->tl_scrollback.ga_data,
+	    (sb_line_T *)term->tl_scrollback.ga_data + todo,
+	    sizeof(sb_line_T) * term->tl_scrollback.ga_len);
+    }
+
     if (ga_grow(&term->tl_scrollback, 1) == OK)
     {
 	cellattr_T	*p = NULL;
@@ -4602,6 +4624,36 @@ f_term_getsize(typval_T *argvars, typval_T *rettv)
     list_append_number(l, buf->b_term->tl_cols);
 }
 
+/*
+ * "term_setsize(buf, rows, cols)" function
+ */
+    void
+f_term_setsize(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
+{
+    buf_T	*buf = term_get_buf(argvars, "term_setsize()");
+    term_T	*term;
+    varnumber_T rows, cols;
+
+    if (buf == NULL)
+    {
+	EMSG(_("E955: Not a terminal buffer"));
+	return;
+    }
+    if (buf->b_term->tl_vterm == NULL)
+	return;
+    term = buf->b_term;
+    rows = get_tv_number(&argvars[1]);
+    rows = rows <= 0 ? term->tl_rows : rows;
+    cols = get_tv_number(&argvars[2]);
+    cols = cols <= 0 ? term->tl_cols : cols;
+    vterm_set_size(term->tl_vterm, rows, cols);
+    /* handle_resize() will resize the windows */
+
+    /* Get and remember the size we ended up with.  Update the pty. */
+    vterm_get_size(term->tl_vterm, &term->tl_rows, &term->tl_cols);
+    term_report_winsize(term, term->tl_rows, term->tl_cols);
+}
+
 /*
  * "term_getstatus(buf)" function
  */
@@ -5432,7 +5484,7 @@ term_free_vterm(term_T *term)
 }
 
 /*
- * Request size to terminal.
+ * Report the size to the terminal.
  */
     static void
 term_report_winsize(term_T *term, int rows, int cols)
@@ -5514,7 +5566,7 @@ term_free_vterm(term_T *term)
 }
 
 /*
- * Request size to terminal.
+ * Report the size to the terminal.
  */
     static void
 term_report_winsize(term_T *term, int rows, int cols)
diff --git a/src/testdir/test_eval_stuff.vim b/src/testdir/test_eval_stuff.vim
index 12222303d3..41ba1374d8 100644
--- a/src/testdir/test_eval_stuff.vim
+++ b/src/testdir/test_eval_stuff.vim
@@ -25,3 +25,20 @@ func Test_nocatch_restore_silent_emsg()
   let c5 = nr2char(screenchar(&lines, 5))
   call assert_equal('wrong', c1 . c2 . c3 . c4 . c5)
 endfunc
+
+func Test_mkdir_p()
+  call mkdir('Xmkdir/nested', 'p')
+  call assert_true(isdirectory('Xmkdir/nested'))
+  try
+    " Trying to make existing directories doesn't error
+    call mkdir('Xmkdir', 'p')
+    call mkdir('Xmkdir/nested', 'p')
+  catch /E739:/
+    call assert_report('mkdir(..., "p") failed for an existing directory')
+  endtry
+  " 'p' doesn't suppress real errors
+  call writefile([], 'Xfile')
+  call assert_fails('call mkdir("Xfile", "p")', 'E739')
+  call delete('Xfile')
+  call delete('Xmkdir', 'rf')
+endfunc
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 75a8c1bb32..3ae008052b 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -271,6 +271,27 @@ func Test_terminal_scroll()
   call delete('Xtext')
 endfunc
 
+func Test_terminal_scrollback()
+  let buf = Run_shell_in_terminal({})
+  set terminalscroll=100
+  call writefile(range(150), 'Xtext')
+  if has('win32')
+    call term_sendkeys(buf, "type Xtext\<CR>")
+  else
+    call term_sendkeys(buf, "cat Xtext\<CR>")
+  endif
+  let rows = term_getsize(buf)[0]
+  call WaitFor({-> term_getline(buf, rows - 1) =~ '149'})
+  let lines = line('$')
+  call assert_true(lines <= 100)
+  call assert_true(lines > 90)
+
+  call Stop_shell_in_terminal(buf)
+  call term_wait(buf)
+  exe buf . 'bwipe'
+  set terminalscroll&
+endfunc
+
 func Test_terminal_size()
   let cmd = Get_cat_123_cmd()
 
@@ -286,9 +307,19 @@ func Test_terminal_size()
 
   vsplit
   exe 'terminal ++rows=5 ++cols=33 ' . cmd
-  let size = term_getsize('')
+  call assert_equal([5, 33], term_getsize(''))
+
+  call term_setsize('', 6, 0)
+  call assert_equal([6, 33], term_getsize(''))
+
+  call term_setsize('', 0, 35)
+  call assert_equal([6, 35], term_getsize(''))
+
+  call term_setsize('', 7, 30)
+  call assert_equal([7, 30], term_getsize(''))
+
   bwipe!
-  call assert_equal([5, 33], size)
+  call assert_fails("call term_setsize('', 7, 30)", "E955:")
 
   call term_start(cmd, {'term_rows': 6, 'term_cols': 36})
   let size = term_getsize('')
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 69b139fe3b..296cba2fd8 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -483,4 +483,28 @@ func Test_access_freed_mem()
   bwipe xxx
 endfunc
 
+func Test_visual_cleared_after_window_split()
+  new | only!
+  let smd_save = &showmode
+  set showmode
+  let ls_save = &laststatus
+  set laststatus=1
+  call setline(1, ['a', 'b', 'c', 'd', ''])
+  norm! G
+  exe "norm! kkvk"
+  redraw
+  exe "norm! \<C-W>v"
+  redraw
+  " check if '-- VISUAL --' disappeared from command line
+  let columns = range(1, &columns)
+  let cmdlinechars = map(columns, 'nr2char(screenchar(&lines, v:val))')
+  let cmdline = join(cmdlinechars, '')
+  let cmdline_ltrim = substitute(cmdline, '^\s*', "", "")
+  let mode_shown = substitute(cmdline_ltrim, '\s*$', "", "")
+  call assert_equal('', mode_shown)
+  let &showmode = smd_save
+  let &laststatus = ls_save
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 41193a9280..8390534382 100644
--- a/src/version.c
+++ b/src/version.c
@@ -777,6 +777,26 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1714,
+/**/
+    1713,
+/**/
+    1712,
+/**/
+    1711,
+/**/
+    1710,
+/**/
+    1709,
+/**/
+    1708,
+/**/
+    1707,
+/**/
+    1706,
+/**/
+    1705,
 /**/
     1704,
 /**/
diff --git a/src/window.c b/src/window.c
index b05c1acbe5..e628dd9fe8 100644
--- a/src/window.c
+++ b/src/window.c
@@ -778,6 +778,7 @@ win_split_ins(
     int		before;
     int		minheight;
     int		wmh1;
+    int		did_set_fraction = FALSE;
 
     if (flags & WSP_TOP)
 	oldwin = firstwin;
@@ -959,6 +960,11 @@ win_split_ins(
 	 * instead, if possible. */
 	if (oldwin->w_p_wfh)
 	{
+	    /* Set w_fraction now so that the cursor keeps the same relative
+	     * vertical position using the old height. */
+	    set_fraction(oldwin);
+	    did_set_fraction = TRUE;
+
 	    win_setheight_win(oldwin->w_height + new_size + STATUS_HEIGHT,
 								      oldwin);
 	    oldwin_height = oldwin->w_height;
@@ -1088,7 +1094,8 @@ win_split_ins(
 
     /* Set w_fraction now so that the cursor keeps the same relative
      * vertical position. */
-    set_fraction(oldwin);
+    if (!did_set_fraction)
+	set_fraction(oldwin);
     wp->w_fraction = oldwin->w_fraction;
 
     if (flags & WSP_VERT)