PATCH: fix use of vi-fetch-history use with a range

[Oliver Kiddle <opk@xxxxxxx>]

In my own setup, I have G bound to a custom widget but I happened to be
using an unconfigured zsh and after pressing dG from vi command mode,
weird things happened with the cursor positioned on the line before the
prompt.

When later checking the code, many history widgets guard against use
in a vi range and return 1. That's absent from vi-fetch-history and,
when invoked in a vi range from an address sanitizer enabled build it
generates errors. This patch fixes a couple of other widgets - just
those where I could reproduce problems but there could well be others
especially if taking account of widgets that are unlikely to be bound in
vi mode.

For vi-fetch-history, moving to the end of the buffer is rather more
useful than bailing out so that is what this does.

Oliver

diff --git a/Src/Zle/zle_hist.c b/Src/Zle/zle_hist.c
index 0fdad70d9..53c722621 100644
--- a/Src/Zle/zle_hist.c
+++ b/Src/Zle/zle_hist.c
@@ -1758,7 +1758,8 @@ acceptandinfernexthistory(char **args)
 {
     Histent he;
 
-    if (!(he = infernexthist(hist_ring, args)))
+    if (virangeflag || !(zlereadflags & ZLRF_HISTORY) ||
+	    !(he = infernexthist(hist_ring, args)))
 	return 1;
     zpushnode(bufstack, ztrdup(he->node.nam));
     done = 1;
@@ -1770,8 +1771,11 @@ acceptandinfernexthistory(char **args)
 int
 infernexthistory(char **args)
 {
-    Histent he = quietgethist(histline);
+    Histent he;
+    if (virangeflag || !(zlereadflags & ZLRF_HISTORY))
+	return 1;
 
+    he = quietgethist(histline);
     if (!he || !(he = infernexthist(he, args)))
 	return 1;
     zle_setline(he);
@@ -1784,12 +1788,14 @@ vifetchhistory(UNUSED(char **args))
 {
     if (zmult < 0)
 	return 1;
-    if (histline == curhist) {
+    if (histline == curhist || virangeflag || !(zlereadflags & ZLRF_HISTORY)) {
 	if (!(zmod.flags & MOD_MULT)) {
 	    zlecs = zlell;
 	    zlecs = findbol();
 	    return 0;
 	}
+	if (virangeflag || !(zlereadflags & ZLRF_HISTORY))
+	    return 1;
     }
     if (!zle_goto_hist((zmod.flags & MOD_MULT) ? zmult : curhist, 0, 0) &&
 	isset(HISTBEEP)) {
@@ -1933,6 +1939,9 @@ getvisrchstr(void)
 int
 vihistorysearchforward(char **args)
 {
+    if (virangeflag || !(zlereadflags & ZLRF_HISTORY))
+	return 1;
+
     if (*args) {
 	int ose = visrchsense, ret;
 	char *ost = visrchstr;
@@ -1954,6 +1963,9 @@ vihistorysearchforward(char **args)
 int
 vihistorysearchbackward(char **args)
 {
+    if (virangeflag || !(zlereadflags & ZLRF_HISTORY))
+	return 1;
+
     if (*args) {
 	int ose = visrchsense, ret;
 	char *ost = visrchstr;
@@ -1979,8 +1991,9 @@ virepeatsearch(UNUSED(char **args))
     int n = zmult;
     char *zt;
 
-    if (!visrchstr)
+    if (!visrchstr || virangeflag || !(zlereadflags & ZLRF_HISTORY))
 	return 1;
+
     if (zmult < 0) {
 	n = -n;
 	visrchsense = -visrchsense;