(gdb) bt full
#0  0x00007f32e54e9d31 in __libc_read (fd=3, buf=buf@entry=0x7ffe05b93247, nbytes=nbytes@entry=1) at ../sysdeps/unix/sysv/linux/read.c:26
        resultvar = 18446744073709551104
        sc_ret = <optimized out>
#1  0x0000555e96efbb90 in read (__nbytes=1, __buf=0x7ffe05b93247, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
No locals.
#2  jobserver_acquire_all () at posixos.c:172
        intake = 43 '+'
        r = <optimized out>
        tokens = 3
#3  0x0000555e96efa2c1 in clean_jobserver (status=0) at main.c:3420
        tokens = <optimized out>
        status = 0
#4  0x0000555e96efa39b in die (status=0) at main.c:3464
        err = 0
        dying = 1 '\001'
#5  0x0000555e96ee99a0 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at main.c:2597
        stdin_nm = 0x0
        makefile_status = 0
        read_files = 0x555e977b5770
        current_directory = "/mnt/home/agentzh/git/systemtap.old\000\000\000\000\000\355\201", '\000' <repeats 22 times>, "\200,\000\000\000\000\000\000\000\020\000\000\000\000\000\000\030\000\000\000\000\000\000\000Wﻑ[\000\000\000\000\337~\023*\000\000\000\000AD;[", '\000' <repeats 12 times>, ">\fa[\000\000\000\000{R\322\037", '\000' <repeats 32 times>, "\377\377\360\177\064G\377\345\062\177\000\000\260\336\036\346\062\177\000\000W\026\331\343\062\177\000\000\000\000\000\000\000\000\000\000\331"...
        restarts = <optimized out>
        syncing = <optimized out>
        argv_slots = <optimized out>