#0  0x00007f85708a3472 in _IO_vfprintf_internal (s=s@entry=0x2432260, format=<optimized out>, format@entry=0x7f8570e80358 "io/hpmud/musb.c 1457: unable to write data (len = %d) %s: %m\n", ap=<optimized out>) at vfprintf.c:1642
  [Error: vfprintf.c was not found in source tree]
#1  0x00007f857096bcdb in ___vfprintf_chk (fp=fp@entry=0x2432260, flag=flag@entry=1, format=format@entry=0x7f8570e80358 "io/hpmud/musb.c 1457: unable to write data (len = %d) %s: %m\n", ap=ap@entry=0x7ffc17c303c8) at vfprintf_chk.c:33
  [Error: vfprintf_chk.c was not found in source tree]
#2  0x00007f8570955942 in __GI___vsyslog_chk (pri=<optimized out>, flag=1, fmt=0x7f8570e80358 "io/hpmud/musb.c 1457: unable to write data (len = %d) %s: %m\n", ap=0x7ffc17c303c8) at ../misc/syslog.c:222
  [Error: syslog.c was not found in source tree]
#3  0x00007f8570955de2 in __syslog_chk (pri=pri@entry=3, flag=flag@entry=1, fmt=fmt@entry=0x7f8570e80358 "io/hpmud/musb.c 1457: unable to write data (len = %d) %s: %m\n") at ../misc/syslog.c:129
  [Error: syslog.c was not found in source tree]
#4  0x00007f8570e7969a in syslog (__fmt=0x7f8570e80358 "io/hpmud/musb.c 1457: unable to write data (len = %d) %s: %m\n", __pri=3) at /usr/include/x86_64-linux-gnu/bits/syslog.h:31
  [Error: syslog.h was not found in source tree]
#5  musb_raw_channel_write (pc=0x7f8571186a50 <ms+822256>, buf=<optimized out>, length=<optimized out>, sec_timeout=45, bytes_wrote=0x7ffc17c30568) at io/hpmud/musb.c:1457
  1452:                 stat = HPMUD_R_IO_TIMEOUT;
  1453:                 if (sec_timeout >= HPMUD_EXCEPTION_SEC_TIMEOUT)
  1454:                     BUG("unable to write data %s: %d second io timeout\n", msp->device[pc->dindex].uri, sec_timeout);
  1455:             }
  1456:             else
  1457:                 BUG("unable to write data (len = %d) %s: %m\n", msp->device[pc->dindex].uri, len);
  1458:             goto bugout;
  1459:         }
  1460:         size-=len;
  1461:         total+=len;
  1462:         *bytes_wrote+=len;
#6  0x00007f8570e78751 in musb_channel_write (pd=0x7f857117e2a8 <ms+787528>, pc=0x7f8571186a50 <ms+822256>, buf=0x7ffc17c30620, length=16384, sec_timeout=45, bytes_wrote=0x7ffc17c30568) at io/hpmud/musb.c:1327
  1322: enum HPMUD_RESULT __attribute__ ((visibility ("hidden"))) musb_channel_write(mud_device *pd, mud_channel *pc, const void *buf, int length, int sec_timeout, int *bytes_wrote)
  1323: {
  1324:     enum HPMUD_RESULT stat;
  1325: 
  1326:     pthread_mutex_lock(&pd->mutex);
  1327:     stat  = (pc->vf.channel_write)(pc, buf, length, sec_timeout, bytes_wrote);
  1328:     pthread_mutex_unlock(&pd->mutex);
  1329:     return stat;
  1330: }
  1331: 
  1332: enum HPMUD_RESULT __attribute__ ((visibility ("hidden"))) musb_channel_read(mud_device *pd, mud_channel *pc, void *buf, int length, int sec_timeout, int *bytes_read)
#7  0x0000000000401a15 in main (argc=<optimized out>, argv=0x7ffc17c34748) at prnt/backend/hp.c:882
  877:                fprintf(stderr, "STATE: -%s\n", "media-empty-error,media-jam-error,hplip.plugin-error,"
  878:                    "cover-open-error,toner-empty-error,other");
  879: 
  880:             } /* if (hd <= 0) */
  881: 
  882:             stat = hpmud_write_channel(hd, cd, buf+total, size, EXCEPTION_TIMEOUT, &n);
  883: 
  884: 
  885:             if (n != size)
  886:             {
  887:                /* IO error, get printer status. */