Core was generated by `./test_egl'.
Program terminated with signal 6, Aborted.
#0  __libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S:47
47	../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S: No such file or directory.
(gdb) bt
#0  __libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S:47
#1  0x401c8e52 in __GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:67
#2  0x401cb228 in __GI_abort () at abort.c:91
#3  0x401ef688 in __libc_message (do_abort=2,
    fmt=0x4026c918 "*** glibc detected *** %s: %s: 0x%s ***\n")
    at ../sysdeps/unix/sysv/linux/libc_fatal.c:201
#4  0x401f5fe6 in malloc_printerr (action=3,
    str=0x4026cb24 "free(): invalid pointer", ptr=<optimized out>)
    at malloc.c:5007
#5  0x40013094 in __pthread_attr_destroy (attr=<optimized out>)
    at pthread_attr_destroy.c:42
#6  0x4023bbd2 in pthread_attr_destroy (attr=<optimized out>) at forward.c:49
#7  0x40179ed0 in ?? ()
#8  0x40179ed0 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)