wip: chase CI-only test failure

Author: vasild

test/functional/feature_bind_extra.py

@@ -7,11 +7,13 @@
 that bind happens on the expected ports.
 """
 
+import socket
 import sys
 
 from test_framework.netutil import (
     addr_to_hex,
     get_bind_addrs,
+    netstat,
     test_ipv6_local,
 )
 from test_framework.test_framework import (
@@ -50,6 +52,9 @@ def setup_network(self):
 
         self.have_ipv6 = test_ipv6_local()
 
+        if self.have_ipv6:
+            self.log.info("IPv6 support detected")
+
         any_ipv4 = addr_to_hex('0.0.0.0')
         any_ipv6 = addr_to_hex('::')
         loopback_ipv4 = addr_to_hex('127.0.0.1')
@@ -109,6 +114,31 @@ def setup_network(self):
         self.setup_nodes()
 
     def run_test(self):
+        self.log.info("TTT 1")
+        try:
+            self.log.info("TTT 2")
+            s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
+            self.log.info("TTT 3")
+            s.connect(('::1', 1234))
+            self.log.info("TTT 4")
+        except Exception as e:
+            self.log.info("TTT 5")
+            self.log.info(e)
+        self.log.info("TTT 6")
+
+        self.log.info('run_test(): netstat TCP')
+        for conn in netstat('tcp'):
+            self.log.info(conn)
+
+        self.log.info('run_test(): netstat TCP6')
+        for conn in netstat('tcp6'):
+            self.log.info(conn)
+
+        import subprocess
+        self.log.info('interfaces:')
+        ifc = subprocess.run('/sbin/ifconfig', capture_output=True)
+        self.log.info(ifc.stdout.decode('UTF-8'))
+
         for i in range(len(self.expected)):
             pid = self.nodes[i].process.pid
             assert_equal(set(get_bind_addrs(pid)), set(self.expected[i][1]))