nticompass@hypercube ~ % DEBUGGER=gdb STEAM_RUNTIME=0 apulse steam
Running Steam on gentoo 2.2 64-bit
STEAM_RUNTIME is disabled by the user
GNU gdb (Gentoo 7.10.1 vanilla) 7.10.1
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Reading symbols from /home/nticompass/.local/share/Steam/ubuntu12_32/steam...(no debugging symbols found)...done.
(gdb) run
Starting program: /home/nticompass/.local/share/Steam/ubuntu12_32/steam
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Installing breakpad exception handler for appid(steam)/version(1495754885)
[New Thread 0xf4618b40 (LWP 6348)]
[New Thread 0xf3c9ab40 (LWP 6349)]
[New Thread 0xf3493b40 (LWP 6350)]
[New Thread 0xf2c92b40 (LWP 6351)]
[New Thread 0xf2491b40 (LWP 6352)]
[New Thread 0xf1c90b40 (LWP 6353)]
[New Thread 0xf117db40 (LWP 6354)]
Installing breakpad exception handler for appid(steam)/version(1495754885)
[Thread 0xf1c90b40 (LWP 6353) exited]
[Thread 0xf2491b40 (LWP 6352) exited]
[Thread 0xf2c92b40 (LWP 6351) exited]
[Thread 0xf3493b40 (LWP 6350) exited]
[Thread 0xf3c9ab40 (LWP 6349) exited]
[Thread 0xf4618b40 (LWP 6348) exited]
Failed to load steamui.so - dlerror(): /usr/lib32/apulse/libpulse.so.0: undefined symbol: trace_pa_volume_as_string
[New Thread 0xf4618b40 (LWP 6355)]
[New Thread 0xf3c9ab40 (LWP 6356)]
[New Thread 0xf1c90b40 (LWP 6357)]
[New Thread 0xf2491b40 (LWP 6358)]
[New Thread 0xedb88b40 (LWP 6359)]
[New Thread 0xed387b40 (LWP 6360)]
[Thread 0xed387b40 (LWP 6360) exited]
[Thread 0xedb88b40 (LWP 6359) exited]
[Thread 0xf2491b40 (LWP 6358) exited]
[Thread 0xf1c90b40 (LWP 6357) exited]
[Thread 0xf3c9ab40 (LWP 6356) exited]
[Thread 0xf4618b40 (LWP 6355) exited]
[Thread 0xf117db40 (LWP 6354) exited]
[2017-05-25 21:24:32] Startup - updater built May 25 2017 22:48:06
[2017-05-25 21:24:32] Opted in to client beta 'publicbeta' via beta file
You are in the 'publicbeta' client beta.
[2017-05-25 21:24:32] Verifying installation...
[2017-05-25 21:24:32] Verification complete
[2017-05-25 21:25:28] Shutdown

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb) info stack
#0  0x00000000 in ?? ()
#1  0xf68b00c3 in ?? () from /usr/lib32/libz.so.1
#2  0xf7fe9aa2 in ?? () from /lib/ld-linux.so.2
#3  0xf7a55313 in ?? () from /lib32/libc.so.6
#4  0xf7a5536f in exit () from /lib32/libc.so.6
#5  0xf7a3f4f2 in __libc_start_main () from /lib32/libc.so.6
#6  0x5657cfe9 in _start ()
(gdb)