In `spawn.c` [here](https://github.com/geany/geany/blob/master/src/spawn.c#L1158) condition is tested against `G_IO_FAILURE` but [this](https://developer.gnome.org/glib/stable/glib-IO-Channels.html#GIOCondition) does not list that as one of the values.
Instead I believe the return from the `g_io_channel_write_chars()` should be checked or the `error` used if more precision is needed.
Thoughts?