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Re: [dbus] type errors

From: Michael Albinus
Subject: Re: [dbus] type errors
Date: Mon, 03 Dec 2012 19:51:57 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

Lluís <address@hidden> writes:

> Hi there,


> I've been trying to register a dbus method which is supposed to return a list 
> of
> elements with the following dbus signature: sssbxxa{sv} (method "GetEvents" in
> "org.gnome.Shell.CalendarServer").

You mean you wrote an own handler which reacts on

> When returning the results, a backtrace pops up with the following error for
> the "b" argument):
>     Debugger entered--Lisp error: (wrong-type-argument D-Bus 63490176000)
>       dbus-message-internal(2 :session ":1.15" 18130 ...)
>       apply(dbus-message-internal 2 :session ":1.15" 18130 (...))
>       dbus-method-return-internal(:session ":1.15" 18130 ...)
>       apply(dbus-method-return-internal :session ":1.15" 18130 (...))

Boolean requests values `t' or `nil'. Not an integer.

> And for the "x" argument:
>      (wrong-type-argument D-Bus 63490176000)

Per default, UINT32 is assumed. If you want to return INT64, you must
specify the type for that value. Something like ... :int64 63490176000 ...

> According to the docs in `dbus', these objects should be automatically
> translated to their dbus counterparts (at least on `dbus-call-method').

The signature of a method is not analyzed in dbus.el. That's why you must
always specify the correct type, if you want to have something different
but the default type.

See (info "(dbus)Type Conversion")

> Thanks,
>   Lluis

Best regards, Michael.

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