Program received signal SIGSEGV, Segmentation fault.
GetScreenPrime (master=0x21e9780, master@entry=0x1, prime_id=prime_id@entry=1)
    at dri2.c:159
159	        if (ds->prime_id == prime_id)
(gdb) bt f
#0  GetScreenPrime (master=0x21e9780, master@entry=0x1, 
    prime_id=prime_id@entry=1) at dri2.c:159
        slave = 0x21e64a0
#1  0x00000000005632dd in GetScreenPrime (prime_id=prime_id@entry=1, 
    master=master@entry=0x1) at dri2.c:152
No locals.
#2  DRI2GetScreenPrime (master=<optimized out>, prime_id=prime_id@entry=1)
    at dri2.c:168
No locals.
#3  0x000000000056537d in DRI2Connect (client=0x2dd49f0, 
    pScreen=<optimized out>, driverType=65536, fd=0x7fffd0db21b0, 
    driverName=0x7fffd0db21c0, deviceName=0x7fffd0db21c8) at dri2.c:1306
        ds = <optimized out>
        prime_id = <optimized out>
        driver_id = <optimized out>
#4  0x000000000056611a in ProcDRI2Connect (client=<optimized out>)
    at dri2ext.c:122
        rep = {type = 1 '\001', pad1 = 0 '\000', sequenceNumber = 27, 
          length = 0, driverNameLength = 0, deviceNameLength = 0, pad2 = 0, 
          pad3 = 0, pad4 = 0, pad5 = 0}
        fd = 45834448
        status = 1
        pDraw = 0x279a2d0
        driverName = 0x2dd49f0 "p\235\300\002"
        deviceName = 0x9a <error: Cannot access memory at address 0x9a>
#5  ProcDRI2Dispatch (client=0x2dd49f0) at dri2ext.c:599
        stuff = 0x2c09d70
#6  0x0000000000437807 in Dispatch ()
No symbol table info available.
#7  0x000000000043b9a6 in dix_main ()
No symbol table info available.
#8  0x00007fc661da0040 in __libc_start_main () from /usr/lib/libc.so.6
No symbol table info available.
#9  0x0000000000425dce in _start ()
No symbol table info available.