Re: g_error_free on a null pointer
- Date: Mon, 28 Nov 2016 18:56:53 +0000
- From: Emmanuele Bassi <ebassi@xxxxxxxxx>
- Subject: Re: g_error_free on a null pointer
On 28 November 2016 at 18:48, Alex Henrie <alexhenrie24@xxxxxxxxx> wrote:
> Can I get some feedback on my patch for
> https://bugzilla.gnome.org/show_bug.cgi?id=774738 ?
> If this bug is not going to be fixed then I'll make sure to put null
> checks before calls to g_error_free, but if it's going to be fixed
> soon then I won't bother.
Only `g_free()` is NULL safe because it's a wrapper around the
system's `free()`, which must be (by C standard) NULL safe. Same goes
for g_slice_free(), because the slab allocator can be overridden and
go through the system allocator.
In general, GLib free functions are not NULL-safe because they are not
deallocating random chunks of memory: they expect a specific
something, and if you pass NULL most likely something wrong is
If you want to do a NULL check and NULLify a pointer, then you should
For GError, you can use g_clear_error().
[@] ebassi [@gmail.com]
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