time and namespace eval completer failures

[q3cpma]

As said in the title, these produce a similar error (e.g. tclreadline::Loop: error. error during evaluation of 'complete(time)' '::tclreadline::ScriptCompleter "\{" 5 6 "time \{"' failed) when hitting TAB:

• time {
• namespace eval
• namespace eval dict {
  The last one is already in the TODO found in tclreadlineCompleter.tcl.

Another question raised by this issue: is there a way to avoid these error message and just do nothing if completion doesn't work?