diff --git a/doc/bird.sgml b/doc/bird.sgml
index c0c90adf..b36e81f3 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1155,14 +1155,16 @@ This argument can be omitted if there exists only a single instance.
 	Show the list of symbols defined in the configuration (names of
 	protocols, routing tables etc.).
 
-	<tag><label id="cli-show-route">show route [[for] <m/prefix/|<m/IP/] [table (<m/t/ | all)] [(import|export) table <m/p/.<m/c/] [filter <m/f/|where <m/c/] [(export|preexport|noexport) <m/p/] [protocol <m/p/] [(stats|count)] [<m/options/]</tag>
+	<tag><label id="cli-show-route">show route [[(for|in)] <m/prefix/|for <m/IP/] [table (<m/t/|all)] [(import|export) table <m/p/.<m/c/] [filter <m/f/|where <m/cond/] [(export|preexport|noexport) <m/p/] [protocol <m/p/] [(stats|count)] [<m/options/]</tag>
 	Show contents of specified routing tables, that is routes, their metrics
 	and (in case the <cf/all/ switch is given) all their attributes.
 
 	<p>You can specify a <m/prefix/ if you want to print routes for a
 	specific network. If you use <cf>for <m/prefix or IP/</cf>, you'll get
 	the entry which will be used for forwarding of packets to the given
-	destination. By default, all routes for each network are printed with
+	destination. Finally, if you use <cf>in <m/prefix/</cf>, you get all
+	prefixes covered by the given prefix.
+	By default, all routes for each network are printed with
 	the selected one at the top, unless <cf/primary/ is given in which case
 	only the selected route is shown.
 
diff --git a/lib/net.c b/lib/net.c
index 976ddbcc..289a4297 100644
--- a/lib/net.c
+++ b/lib/net.c
@@ -57,6 +57,19 @@ const u16 net_max_text_length[] = {
   [NET_MPLS]	= 7,	/* "1048575" */
 };
 
+/* There should be no implicit padding in net_addr structures */
+STATIC_ASSERT(sizeof(net_addr)		== 24);
+STATIC_ASSERT(sizeof(net_addr_ip4)	==  8);
+STATIC_ASSERT(sizeof(net_addr_ip6)	== 20);
+STATIC_ASSERT(sizeof(net_addr_vpn4)	== 16);
+STATIC_ASSERT(sizeof(net_addr_vpn6)	== 32);
+STATIC_ASSERT(sizeof(net_addr_roa4)	== 16);
+STATIC_ASSERT(sizeof(net_addr_roa6)	== 28);
+STATIC_ASSERT(sizeof(net_addr_flow4)	==  8);
+STATIC_ASSERT(sizeof(net_addr_flow6)	== 20);
+STATIC_ASSERT(sizeof(net_addr_ip6_sadr)	== 40);
+STATIC_ASSERT(sizeof(net_addr_mpls)	==  8);
+
 
 int
 rd_format(const u64 rd, char *buf, int buflen)
@@ -310,22 +323,3 @@ net_in_netX(const net_addr *a, const net_addr *n)
 
   return (net_pxlen(n) <= net_pxlen(a)) && ipa_in_netX(net_prefix(a), n);
 }
-
-#define CHECK_NET(T,S) \
-  ({ if (sizeof(T) != S) die("sizeof %s is %d/%d", #T, (int) sizeof(T), S); })
-
-void
-net_init(void)
-{
-  CHECK_NET(net_addr,		24);
-  CHECK_NET(net_addr_ip4,	 8);
-  CHECK_NET(net_addr_ip6,	20);
-  CHECK_NET(net_addr_vpn4,	16);
-  CHECK_NET(net_addr_vpn6,	32);
-  CHECK_NET(net_addr_roa4,	16);
-  CHECK_NET(net_addr_roa6,	28);
-  CHECK_NET(net_addr_flow4,	 8);
-  CHECK_NET(net_addr_flow6,	20);
-  CHECK_NET(net_addr_ip6_sadr,	40);
-  CHECK_NET(net_addr_mpls,	 8);
-}
diff --git a/lib/net.h b/lib/net.h
index 9f4a00ad..da7254c2 100644
--- a/lib/net.h
+++ b/lib/net.h
@@ -620,6 +620,4 @@ static inline int net_in_net_src_ip6_sadr(const net_addr_ip6_sadr *a, const net_
 int ipa_in_netX(const ip_addr A, const net_addr *N);
 int net_in_netX(const net_addr *A, const net_addr *N);
 
-void net_init(void);
-
 #endif
diff --git a/lib/printf_test.c b/lib/printf_test.c
index 47ea905d..88ecf05e 100644
--- a/lib/printf_test.c
+++ b/lib/printf_test.c
@@ -32,11 +32,14 @@ t_simple(void)
   BSPRINTF(1, "@", buf, "@", 64);
   BSPRINTF(1, "\xff", buf, "%c", 0xff);
 
-  errno = 5;
-  BSPRINTF(18, "Input/output error", buf, "%m");
+  const char *io_error_str = lp_strdup(tmp_linpool, strerror(EIO));
+  const int io_error_len = strlen(io_error_str);
+
+  errno = EIO;
+  BSPRINTF(io_error_len, io_error_str, buf, "%m");
   errno = 0;
 
-  BSPRINTF(18, "Input/output error", buf, "%M", 5);
+  BSPRINTF(io_error_len, io_error_str, buf, "%M", EIO);
 
   BSPRINTF(11, "TeSt%StRiNg", buf, "%s", "TeSt%StRiNg");
 
diff --git a/nest/config.Y b/nest/config.Y
index 8c3ee8ad..bce8b228 100644
--- a/nest/config.Y
+++ b/nest/config.Y
@@ -656,7 +656,7 @@ CF_CLI(SHOW INTERFACES SUMMARY,,, [[Show summary of network interfaces]])
 { if_show_summary(); } ;
 
 CF_CLI_HELP(SHOW ROUTE, ..., [[Show routing table]])
-CF_CLI(SHOW ROUTE, r_args, [[[<prefix>|for <prefix>|for <ip>] [table <t>] [(import|export) table <p>.<c>] [filter <f>|where <cond>] [all] [primary] [filtered] [(export|preexport|noexport) <p>] [protocol <p>] [stats|count]]], [[Show routing table]])
+CF_CLI(SHOW ROUTE, r_args, [[[<prefix>|for <prefix>|for <ip>|in <prefix>] [table <t>] [(import|export) table <p>.<c>] [filter <f>|where <cond>] [all] [primary] [filtered] [(export|preexport|noexport) <p>] [protocol <p>] [stats|count]]], [[Show routing table]])
 { rt_show($3); } ;
 
 r_args:
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c
index 79db32d3..0337c755 100644
--- a/sysdep/unix/main.c
+++ b/sysdep/unix/main.c
@@ -900,7 +900,6 @@ main(int argc, char **argv)
   the_bird_lock();
 
   random_init();
-  net_init();
   resource_init();
   birdloop_init();
   olock_init();