[alsa-devel] crash with assertion (?)

Clemens Ladisch clemens at ladisch.de
Tue Sep 7 19:06:05 CEST 2010

IOhannes m zmoelnig wrote:
> i'm requesting my "plughw" device with 44100Hz
> the request is done with something like:
>  rate=44100;
>  err = snd_pcm_hw_params_set_rate_min(handle, params, &rate, 0);

This requests a sample rate of at least 44100 Hz.

> [...]
>  err = snd_pcm_hw_params(handle, params);
> what happens:
> in the snd_pcm_hw_params(), my program exits with:
> "interval_inline.h:52: snd_interval_single: Assertion
> `!snd_interval_empty(i)' failed."

You called snd_pcm_hw_params with an invalid params structure.
I'd guess that snd_pcm_hw_params_set_rate_min (or some other
snd_pcm_hw_params_set_*) returned an error.


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