Index: library/xotcl/doc/langRef.xotcl
===================================================================
diff -u -ra24e1f836c3126d0a0e9467bde3a9fa8da901711 -rfa7635cbfe2309b8e6282e2c7925fa2617b061aa
--- library/xotcl/doc/langRef.xotcl	(.../langRef.xotcl)	(revision a24e1f836c3126d0a0e9467bde3a9fa8da901711)
+++ library/xotcl/doc/langRef.xotcl	(.../langRef.xotcl)	(revision fa7635cbfe2309b8e6282e2c7925fa2617b061aa)
@@ -5,6 +5,20 @@
 namespace eval ::xotcl {}
 namespace import -force ::xotcl::@
 
+# catch {
+# @ XXX x x
+# } msg
+
+# puts stderr $::errorInfo
+if {$::tcl_version >= 8.6} {
+  #
+  # Without this [namespace which] (or any other [namespace *]
+  # command, the previously ::nxdoc::@ is called, rather than the
+  # imported ::xotcl::@?!?!
+  #
+  namespace which @
+}
+
 @ @File {
   description {
     XOTcl language reference. Describes predefined objects and classes.