Trying to run pipewire on a raspberry pi 3, using guppy as a base, I got a "Bus Error" on a call to strncpy() inside pipewire.

Debugging a bit, it looks like the crash happens in a function that reads:

static const char default_device[] = "hw:0";
static const uint32_t default_min_latency = 16;
static const uint32_t default_max_latency = 1024;


static void reset_props(struct props *props)
{
        strncpy(props->device, default_device, 64);
        props->min_latency = default_min_latency;
        props->max_latency = default_max_latency;
}

and in assembly the program counter stops right after a neon instruction:

   0x763279a0 <impl_init+464>:	str	r5, [r4, #96]	; 0x60
   0x763279a4 <impl_init+468>:	vst1.8	{d8-d9}, [r2 :64]
=> 0x763279a8 <impl_init+472>:	mov	r2, #64	; 0x40
   0x763279ac <impl_init+476>:	str	lr, [r4, #128]	; 0x80
   0x763279b0 <impl_init+480>:	strd	r10, [r4, #144]	; 0x90

Recompiling pipewire with exactly the same compiler flags, using linaro gcc 7.4.1-2019.02-x86_64_arm-linux-gnueabihf completely fixes the crash.

I have also observed similar crashes in:

• the Dashboard app (crashes while starting)
• the Mixer app (crashes while starting)
• the Radio app using RTL-SDR (the RTL-SDR helper crashes when you hit play)