I wrote:
> As it is, the loop never exits.  My actual code for
> on_net_state_change includes some output statments which report its
> arguments.  They show that it is never called with the REQUEST and
> STOP flags.

To be clear, I mean it is never called with the REQUEST and STOP flags
once this loop begins.  There are matching numbers of calls with
REQUEST|START and REQUEST|STOP flags during the initial page load,
so that pending_req_count_ is equal to zero after a DispatchEvent()
call that doesn't kick off an image load.

-- 
Ben Hutchings
Never attribute to conspiracy what can adequately be explained by stupidity.
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