Created attachment 77983 [details] [review]
patch

With this we can do:
rhythmbox -D metadata

to see the errors from the helper process.

Ok to commit?

I have a simpler patch somewhere that just passes the -d/-D option through to the metadata helper.  The metadata helper inherits the parent's stderr, so the io watch isn't really necessary unless you want to clearly distinguish output from the child process.  Maybe we could add an option to rb_debug_init to have the output prefixed with g_get_prgname().

*** Bug 351418 has been marked as a duplicate of this bug. ***

Created attachment 78280 [details] [review]
other patch

I committed something halfway in between.