[Bug 44939] Regression in salut/p2p mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=44939

--- Comment #8 from Will Thompson <will.thompson at collabora.co.uk> 2012-02-21 03:04:24 PST ---
Created attachment 57382
  --> https://bugs.freedesktop.org/attachment.cgi?id=57382
Account: don't crash on Get('Parameters') if _dup_parameters fails

If the connection manager is not installed, or is installed but doesn't
have the protocol for the account, then _mcd_account_dup_parameters()
returns %NULL. (As the comment I've added says, I think this is
ridiculous—it's fall-out from MC not storing the types of parameters.)

As a result, Get('Parameters') or GetAll() would crash, because
dbus-glib would try to serialize a NULL GHashTable and blow up. (See
<https://bugs.freedesktop.org/show_bug.cgi?id=44939>.) So with this
patch, we handle NULL as "no parameters" for the sake of D-Bus
properties. (Because this situation should only arise if the account is
invalid, we also warn if _dup_parameters() returns NULL for valid
accounts.)

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