Index: client/1.0/neutral/common.tcl
==================================================================
--- client/1.0/neutral/common.tcl
+++ client/1.0/neutral/common.tcl
@@ -162,11 +162,12 @@
   #       argument is an empty string, nothing is written.
   #
   proc pageLog { string } {
     if {[string length $string] > 0} then {
       catch {
-        tclLog [appendArgs [pid] " : " [clock seconds] " : http : " $string]
+        tclLog [appendArgs \
+            [pid] " : " [clock seconds] " : http : " $string]
       }
     }
   }
 
   #
@@ -316,10 +317,23 @@
       #
       # NOTE: Grab the HTTP response code and data now as they are needed
       #       in almost all cases.
       #
       set code [::http::ncode $token]; set data [::http::data $token]
+
+      #
+      # NOTE: If the HTTP response code is an empty string that may
+      #       indicate a serious bug in the tls (or http) package for
+      #       this platform.  So far, this issue has only been seen
+      #       with the tls 1.6.1 package that shipped with macOS.
+      #
+      if {[string length $code] == 0} then {
+        error [appendArgs \
+            "received empty HTTP response code for URL \"" $uri \
+            "\", the \"tls\" (and/or \"http\") package(s) may be " \
+            "broken for this platform"]
+      }
 
       #
       # NOTE: Check the HTTP response code, in order to follow any HTTP
       #       redirect responses.
       #

Index: client/1.0/neutral/common.tcl.asc
==================================================================
--- client/1.0/neutral/common.tcl.asc
+++ client/1.0/neutral/common.tcl.asc
@@ -1,18 +1,18 @@
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