add fix

lib/ch/connection.ex

@@ -50,6 +50,8 @@ defmodule Ch.Connection do
           {:error, reason}
       end
     end
+  catch
+    _kind, reason -> {:error, reason}
   end
 
   @impl true

test/ch/connect_test.exs

@@ -1,13 +1,22 @@
 defmodule Ch.ConnectTest do
-  use ExUnit.Case, async: true
+  use ExUnit.Case
+  import ExUnit.CaptureLog
 
   @tag :slow
   test "retries to connect even with exceptions" do
-    {:ok, conn} =
-      Ch.start_link(database: Ch.Test.database(), transport_opts: [sndbuf: nil])
+    # See https://github.com/plausible/ch/issues/208
+    bad_transport_opts = [sndbuf: nil]
 
-    :timer.sleep(100)
+    logs =
+      capture_log(fn ->
+        {:ok, conn} =
+          Ch.start_link(database: Ch.Test.database(), transport_opts: bad_transport_opts)
 
-    assert Process.alive?(conn)
+        :timer.sleep(100)
+
+        assert Process.alive?(conn)
+      end)
+
+    assert logs =~ "failed to connect: ** (ArgumentError) argument error"
   end
 end