dbus/message.rb:87:in `synchronize': can't be called from trap context (ThreadError)

[tomasjura]

Explanation: Holding mutex in trap is deadlockable. It is what ruby complained.

Possible solutions I found at this blog

[Martin Vidner]

Thanks for the report!

In what context are you getting this error? Do you have a simple test case for it?

BTW lps-it.fr seems to be down, but I copied its Google cache to a gist.

[tomasjura]

I'm writing a simple dbus client for modem manager and it's location (org.freedesktop.ModemManager1.Modem.Location) interface. When terminated by SIGINT I want the client to stop the GPS.

I do not have the example any more - I rewrote it and used pipe IO.select as shown in the mentioned blog. But simply any contruction like

Signal.trap("SIGINT") {
  dbus_interface.method
}
sleep 10 while true

and sending the INT signal to process should raise the error message.