maint: suppress some clang scan-build warnings

* src/pr.c (char_to_clump): Remove a dead store.
* src/remove.c (fts_skip_tree): Likewise.
* src/sort.c (key_warnings): Likewise.
(sort): Suppress an uninitialized pointer warning.

3 files changed, 8 insertions, 6 deletions

diff --git a/src/pr.c b/src/pr.c
index 4748604c9..7e6b13cc8 100644
--- a/src/pr.c
+++ b/src/pr.c
@@ -2695,7 +2695,7 @@ char_to_clump (char c)
               width = 2;
               chars = 2;
               *s++ = '^';
-              *s++ = c ^ 0100;
+              *s = c ^ 0100;
             }
           else
             {
diff --git a/src/remove.c b/src/remove.c
index a473dab95..f7b00c62e 100644
--- a/src/remove.c
+++ b/src/remove.c
@@ -25,6 +25,7 @@
 #include "error.h"
 #include "euidaccess-stat.h"
 #include "file-type.h"
+#include "ignore-value.h"
 #include "quote.h"
 #include "remove.h"
 #include "root-dev-ino.h"
@@ -402,7 +403,7 @@ fts_skip_tree (FTS *fts, FTSENT *ent)
 {
   fts_set (fts, ent, FTS_SKIP);
   /* Ensure that we do not process ENT a second time.  */
-  ent = fts_read (fts);
+  ignore_value (fts_read (fts));
 }
 
 /* Upon unlink failure, or when the user declines to remove ENT, mark
diff --git a/src/sort.c b/src/sort.c
index cbc0c3856..06b0d95a1 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -2341,10 +2341,10 @@ key_warnings (struct keyfield const *gkey, bool gkey_only)
           pn = stpcpy (stpcpy (pn, "-k "), umaxtostr (sword + 1, tmp));
           if (key->eword != SIZE_MAX)
             {
-              po = stpcpy (stpcpy (po, " -"), umaxtostr (eword + 1, tmp));
-              pn = stpcpy (stpcpy (pn, ","),
-                           umaxtostr (eword + 1
-                                      + (key->echar == SIZE_MAX), tmp));
+              stpcpy (stpcpy (po, " -"), umaxtostr (eword + 1, tmp));
+              stpcpy (stpcpy (pn, ","),
+                      umaxtostr (eword + 1
+                                 + (key->echar == SIZE_MAX), tmp));
             }
           error (0, 0, _("obsolescent key `%s' used; consider `%s' instead"),
                  obuf, nbuf);
@@ -3770,6 +3770,7 @@ sort (char *const *files, size_t nfiles, char const *output_file,
       size_t nthreads)
 {
   struct buffer buf;
+  IF_LINT (buf.buf = NULL);
   size_t ntemps = 0;
   bool output_file_created = false;