fix possible crash while opening help

Suggested by Benno Schulenberg (upstream maintainer) at:

http://lists.gnu.org/archive/html/nano-devel/2019-05/msg00027.html

0002-nano-3.0-crash-on-bad-quoting-regex.patch

@@ -0,0 +1,49 @@
+From c3bf9d981768bb1e96d73c9a001a6a77713a6245 Mon Sep 17 00:00:00 2001
+From: David Lawrence Ramsey <pooka109@gmail.com>
+Date: Mon, 10 Dec 2018 14:25:15 -0600
+Subject: [PATCH] options: exit on a bad quoting regex, instead of crashing
+ later
+
+The paragraph-jumping functions used the regex unverified...
+
+This fixes https://savannah.gnu.org/bugs/?55169.
+
+Upstream-commit: 6e3b9ac0587243460c1f8a19d3fcc4402f98808d
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ src/nano.c | 2 ++
+ src/text.c | 5 -----
+ 2 files changed, 2 insertions(+), 5 deletions(-)
+
+diff --git a/src/nano.c b/src/nano.c
+index 74e1243..1900d3e 100644
+--- a/src/nano.c
++++ b/src/nano.c
+@@ -2486,6 +2486,8 @@ int main(int argc, char **argv)
+ 
+ 		quoteerr = charalloc(size);
+ 		regerror(quoterc, &quotereg, quoteerr, size);
++
++		die(_("Bad quoting regex \"%s\": %s\n"), quotestr, quoteerr);
+ 	}
+ #endif /* ENABLE_JUSTIFY */
+ 
+diff --git a/src/text.c b/src/text.c
+index 8919916..6e730b6 100644
+--- a/src/text.c
++++ b/src/text.c
+@@ -2131,11 +2131,6 @@ bool find_paragraph(size_t *const quote, size_t *const par)
+ 	filestruct *current_save;
+ 		/* The line at the beginning of the paragraph we search for. */
+ 
+-	if (quoterc != 0) {
+-		statusline(ALERT, _("Bad quote string %s: %s"), quotestr, quoteerr);
+-		return FALSE;
+-	}
+-
+ 	/* If we're at the end of the last line of the file, it means that
+ 	 * there aren't any paragraphs left, so get out. */
+ 	if (openfile->current == openfile->filebot && openfile->current_x ==
+-- 
+2.20.1
+

0003-nano-3.0-history-use-after-free.patch

@@ -0,0 +1,48 @@
+From 8817d48ce9b2fccba83251f10cd7827412c9ef41 Mon Sep 17 00:00:00 2001
+From: Brand Huntsman <alpha@qzx.com>
+Date: Wed, 27 Feb 2019 02:40:18 -0700
+Subject: [PATCH] history: use an unfreed 'position_history' to avoid a
+ possible crash
+
+The reload_positions_if_needed() routine can free the existing
+'position_history' and allocate a new one.  Using the old one,
+from before the reload, could lead to a crash.
+
+This fixes https://savannah.gnu.org/bugs/?55792.
+Reported-by: Enrico Mioso <mrkiko.rs@gmail.com>
+
+Bug existed since the reloading of the position-history file was
+introduced, a year and a half ago, in commit bfc53f30.
+
+Signed-off-by: Brand Huntsman <alpha@qzx.com>
+
+Upstream-commit: a5ef013e826bfd10d530dabbd961f9044b95b53f
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ src/history.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/history.c b/src/history.c
+index 5668038..ca8c60d 100644
+--- a/src/history.c
++++ b/src/history.c
+@@ -593,7 +593,7 @@ void update_poshistory(char *filename, ssize_t lineno, ssize_t xpos)
+  * set line and column to the retrieved values. */
+ bool has_old_position(const char *file, ssize_t *line, ssize_t *column)
+ {
+-	poshiststruct *posptr = position_history;
++	poshiststruct *posptr;
+ 	char *fullpath = get_full_path(file);
+ 
+ 	if (fullpath == NULL)
+@@ -601,6 +601,7 @@ bool has_old_position(const char *file, ssize_t *line, ssize_t *column)
+ 
+ 	reload_positions_if_needed();
+ 
++	posptr = position_history;
+ 	while (posptr != NULL && strcmp(posptr->filename, fullpath) != 0)
+ 		posptr = posptr->next;
+ 
+-- 
+2.20.1
+

0004-nano-3.0-unindent-partial-line.patch

@@ -0,0 +1,38 @@
+From c03f2cc36a2539316437cff4313823c0a0882473 Mon Sep 17 00:00:00 2001
+From: Benno Schulenberg <bensberg@telfort.nl>
+Date: Fri, 12 Apr 2019 14:00:14 +0200
+Subject: [PATCH] unindent: ensure that a partial line gets displayed properly
+ afterwards
+
+When only the trailing chunk of a line is displayed on the top row of
+the screen, and the unindenting of this line leads to a reduction in
+the number of chunks, then the starting point of the viewport needs
+to be re-evaluated.  For simplicity, do this always when something is
+unindented.
+
+This fixes https://savannah.gnu.org/bugs/?56102.
+Reported-by: Devin Hussey <husseydevin@gmail.com>
+
+Bug existed since around version 2.9.2.
+
+Upstream-commit: 1c707d4f99cc919070104de09efe1e5a6302b6ce
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ src/text.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/text.c b/src/text.c
+index 6e730b6..eb0163e 100644
+--- a/src/text.c
++++ b/src/text.c
+@@ -443,6 +443,7 @@ void do_unindent(void)
+ 	}
+ 
+ 	set_modified();
++	ensure_firstcolumn_is_aligned();
+ 	refresh_needed = TRUE;
+ 	shift_held = TRUE;
+ }
+-- 
+2.20.1
+

0005-nano-4.2-help-crash.patch

@@ -0,0 +1,30 @@
+From 00351963c03818d058bfc355663fe0d7c86b9386 Mon Sep 17 00:00:00 2001
+From: Benno Schulenberg <bensberg@telfort.nl>
+Date: Thu, 23 May 2019 12:43:31 +0200
+Subject: [PATCH] help: don't check for confinement when opening a temporary
+ help-text file
+
+This fixes https://savannah.gnu.org/bugs/?56369.
+
+Upstream-commit: acd23551c3322f397dc43f97796273a8958f6ef9
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ src/files.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/files.c b/src/files.c
+index 20bbd942..7952bc00 100644
+--- a/src/files.c
++++ b/src/files.c
+@@ -420,7 +420,7 @@ bool open_buffer(const char *filename, bool new_buffer)
+ 	as_an_at = FALSE;
+ 
+ #ifdef ENABLE_OPERATINGDIR
+-	if (outside_of_confinement(filename, FALSE)) {
++	if (!inhelp && outside_of_confinement(filename, FALSE)) {
+ 		statusline(ALERT, _("Can't read file from outside of %s"),
+ 								operating_dir);
+ 		return FALSE;
+-- 
+2.20.1
+

nano.spec

@@ -1,7 +1,7 @@
 Summary:         A small text editor
 Name:            nano
 Version:         2.9.8
-Release:         1%{?dist}
+Release:         2%{?dist}
 License:         GPLv3+
 URL:             https://www.nano-editor.org
 Source:          https://www.nano-editor.org/dist/v2.9/%{name}-%{version}.tar.gz
@@ -19,6 +19,18 @@ Conflicts:       filesystem < 3
 Requires(post):  /sbin/install-info
 Requires(preun): /sbin/install-info
 
+# do not crash on a bad quoting regex
+Patch2:   0002-nano-3.0-crash-on-bad-quoting-regex.patch
+
+# fix user-after-free bug on position_history
+Patch3:   0003-nano-3.0-history-use-after-free.patch
+
+# display partial lines properly on unindent
+Patch4:   0004-nano-3.0-unindent-partial-line.patch
+
+# fix possible crash while opening help
+Patch5:   0005-nano-4.2-help-crash.patch
+
 %description
 GNU nano is a small and friendly text editor.
 
@@ -80,6 +92,12 @@ exit 0
 %{_datadir}/nano
 
 %changelog
+* Tue May 28 2019 Kamil Dudka <kdudka@redhat.com> - 2.9.8-2
+- fix possible crash while opening help
+- display partial lines properly on unindent
+- fix user-after-free bug on position_history
+- do not crash on a bad quoting regex
+
 * Mon Jun 04 2018 Kamil Dudka <kdudka@redhat.com> - 2.9.8-1
 - new upstream release