Fix segfault when nroff is not installed

* src/man.c (try_section): Only free the `names` list if it is non-NULL
due to `NROFF_MISSING` being defined, and return early if options are
set such that cat files cannot be used either.
* NEWS.md: Document this.

2 files changed, 5 insertions, 1 deletions

diff --git a/NEWS.md b/NEWS.md
index 6aa4ff42..3c142df1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,7 @@ man-db 2.11.2
 Fixes:
 
  * Fix compile and test failures when `troff` is not `groff`.
+ * Fix segfault in typical uses of `man` when `nroff` is not installed.
 
 man-db 2.11.1 (15 November 2022)
 ================================
diff --git a/src/man.c b/src/man.c
index 713f41ef..f072c75b 100644
--- a/src/man.c
+++ b/src/man.c
@@ -3182,12 +3182,15 @@ static int try_section (const char *path, const char *sec, const char *name,
 			return 1;
 
 		if (!troff && !want_encoding && !recode) {
-			gl_list_free (names);
+			if (names)
+				gl_list_free (names);
 			names = look_for_file (path, sec, name, true,
 					       lff_opts);
 			cat = 1;
 		}
 	}
+	if (!names)
+		return 0;
 
 	order_files (path, &names);