diff --git a/src/invitation.c b/src/invitation.c
index 9a082e3f..ac410b81 100644
--- a/src/invitation.c
+++ b/src/invitation.c
@@ -252,8 +252,8 @@ int cmd_invite(int argc, char *argv[]) {
 	}
 
 	// If a daemon is running, ensure no other nodes know about this name
-	bool found = false;
 	if(connect_tincd(false)) {
+		bool found = false;
 		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
 
 		while(recvline(fd, line, sizeof line)) {
@@ -686,7 +686,7 @@ make_names:
 		}
 
 		// Copy the safe variable to the right config file
-		fprintf(variables[i].type & VAR_HOST ? fh : f, "%s = %s\n", l, value);
+		fprintf((variables[i].type & VAR_HOST) ? fh : f, "%s = %s\n", l, value);
 	}
 
 	fclose(f);
diff --git a/src/protocol_key.c b/src/protocol_key.c
index d24d4aca..e1bb3b9b 100644
--- a/src/protocol_key.c
+++ b/src/protocol_key.c
@@ -356,7 +356,7 @@ bool ans_key_h(connection_t *c, const char *request) {
 	char key[MAX_STRING_SIZE];
 	char address[MAX_STRING_SIZE] = "";
 	char port[MAX_STRING_SIZE] = "";
-	int cipher, digest, maclength, compression, keylen;
+	int cipher, digest, maclength, compression;
 	node_t *from, *to;
 
 	if(sscanf(request, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d "MAX_STRING" "MAX_STRING,
@@ -489,7 +489,7 @@ bool ans_key_h(connection_t *c, const char *request) {
 
 	/* Process key */
 
-	keylen = hex2bin(key, key, sizeof key);
+	int keylen = hex2bin(key, key, sizeof key);
 
 	if(keylen != (from->outcipher ? cipher_keylength(from->outcipher) : 1)) {
 		logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses wrong keylength!", from->name, from->hostname);
diff --git a/src/route.c b/src/route.c
index c10fddb5..7ae49607 100644
--- a/src/route.c
+++ b/src/route.c
@@ -510,7 +510,7 @@ static void route_broadcast(node_t *source, vpn_packet_t *packet) {
 static void fragment_ipv4_packet(node_t *dest, vpn_packet_t *packet, length_t ether_size) {
 	struct ip ip;
 	vpn_packet_t fragment;
-	int len, maxlen, todo;
+	int maxlen, todo;
 	uint8_t *offset;
 	uint16_t ip_off, origf;
 
@@ -537,7 +537,7 @@ static void fragment_ipv4_packet(node_t *dest, vpn_packet_t *packet, length_t et
 	ip_off &= IP_OFFMASK;
 
 	while(todo) {
-		len = todo > maxlen ? maxlen : todo;
+		int len = todo > maxlen ? maxlen : todo;
 		memcpy(DATA(&fragment) + ether_size + ip_size, offset, len);
 		todo -= len;
 		offset += len;
diff --git a/src/tincctl.c b/src/tincctl.c
index 6f4fb930..6416ebe0 100644
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -513,7 +513,7 @@ bool recvline(int fd, char *line, size_t len) {
 	char *newline = NULL;
 
 	if(!fd)
-		abort();
+		return false;
 
 	while(!(newline = memchr(buffer, '\n', blen))) {
 		int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
@@ -951,11 +951,11 @@ static int cmd_stop(int argc, char *argv[]) {
 	if(!connect_tincd(true)) {
 		if(pid) {
 			if(kill(pid, SIGTERM)) {
-				fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
+				fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
 				return 1;
 			}
 
-			fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
+			fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
 			waitpid(pid, NULL, 0);
 			return 0;
 		}
@@ -1030,7 +1030,6 @@ static int dump_invitations(void) {
 		FILE *f = fopen(fname, "r");
 		if(!f) {
 			fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
-			fclose(f);
 			continue;
 		}
 
@@ -2826,8 +2825,6 @@ static int cmd_shell(int argc, char *argv[]) {
 
 		while(p && *p) {
 			if(nargc >= maxargs) {
-				fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
-				abort();
 				maxargs *= 2;
 				nargv = xrealloc(nargv, maxargs * sizeof *nargv);
 			}
diff --git a/src/top.c b/src/top.c
index e517b4f9..fe6f384e 100644
--- a/src/top.c
+++ b/src/top.c
@@ -158,40 +158,47 @@ static int cmpu64(uint64_t a, uint64_t b) {
 static int sortfunc(const void *a, const void *b) {
 	const nodestats_t *na = *(const nodestats_t **)a;
 	const nodestats_t *nb = *(const nodestats_t **)b;
+	int result;
+
 	switch(sortmode) {
 		case 1:
 			if(cumulative)
-				return -cmpu64(na->in_packets, nb->in_packets) ?: na->i - nb->i;
+				result = -cmpu64(na->in_packets, nb->in_packets);
 			else
-				return -cmpfloat(na->in_packets_rate, nb->in_packets_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->in_packets_rate, nb->in_packets_rate);
 		case 2:
 			if(cumulative)
-				return -cmpu64(na->in_bytes, nb->in_bytes) ?: na->i - nb->i;
+				result = -cmpu64(na->in_bytes, nb->in_bytes);
 			else
-				return -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->in_bytes_rate, nb->in_bytes_rate);
 		case 3:
 			if(cumulative)
-				return -cmpu64(na->out_packets, nb->out_packets) ?: na->i - nb->i;
+				result = -cmpu64(na->out_packets, nb->out_packets);
 			else
-				return -cmpfloat(na->out_packets_rate, nb->out_packets_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->out_packets_rate, nb->out_packets_rate);
 		case 4:
 			if(cumulative)
-				return -cmpu64(na->out_bytes, nb->out_bytes) ?: na->i - nb->i;
+				result = -cmpu64(na->out_bytes, nb->out_bytes);
 			else
-				return -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->out_bytes_rate, nb->out_bytes_rate);
 		case 5:
 			if(cumulative)
-				return -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets) ?: na->i - nb->i;
+				result = -cmpu64(na->in_packets + na->out_packets, nb->in_packets + nb->out_packets);
 			else
-				return -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->in_packets_rate + na->out_packets_rate, nb->in_packets_rate + nb->out_packets_rate);
 		case 6:
 			if(cumulative)
-				return -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes) ?: na->i - nb->i;
+				result = -cmpu64(na->in_bytes + na->out_bytes, nb->in_bytes + nb->out_bytes);
 			else
-				return -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate) ?: na->i - nb->i;
+				result = -cmpfloat(na->in_bytes_rate + na->out_bytes_rate, nb->in_bytes_rate + nb->out_bytes_rate);
 		default:
-			return strcmp(na->name, nb->name) ?: na->i - nb->i;
+			result = strcmp(na->name, nb->name);
 	}
+
+	if(result)
+		return result;
+	else
+		return na->i - nb->i;
 }
 
 static void redraw(void) {