slackware-current/source/a/tar/tar.nolonezero.diff

--- ./src/list.c.orig	2017-12-16 15:23:12.000000000 -0600
+++ ./src/list.c	2018-09-06 16:51:52.982740004 -0500
@@ -242,15 +242,22 @@
 
 	  if (!ignore_zeros_option)
 	    {
-	      char buf[UINTMAX_STRSIZE_BOUND];
+
+	      /*
+	       * According to POSIX tar specs, this is wrong, but on the web
+	       * there are some tar specs that can trigger this, and some tar
+	       * implementations create tars according to that spec.  For now,
+	       * let's not be pedantic about issuing the warning.
+	       *
+	       * char buf[UINTMAX_STRSIZE_BOUND]; */
 
 	      status = read_header (&current_header, &current_stat_info,
 	                            read_header_auto);
-	      if (status == HEADER_ZERO_BLOCK)
-		break;
-	      WARNOPT (WARN_ALONE_ZERO_BLOCK,
-		       (0, 0, _("A lone zero block at %s"),
-			STRINGIFY_BIGINT (current_block_ordinal (), buf)));
+	      /* if (status == HEADER_ZERO_BLOCK)
+	       *	break;
+	       * WARNOPT (WARN_ALONE_ZERO_BLOCK,
+	       *	       (0, 0, _("A lone zero block at %s"),
+	       *		STRINGIFY_BIGINT (current_block_ordinal (), buf))); */
 	      break;
 	    }
 	  status = prev_status;