invalid pointer in tb_shutdown()

[sternenseemann]

*** Error in `/home/lukas/Hacking/c/tinyrl/bin/tinyrl': munmap_chunk(): invalid pointer: 0x0000000000607f80 ***
^[[C======= Backtrace: =========
/usr/lib/libc.so.6(+0x732ae)[0x7ffff77a62ae]
/usr/lib/libc.so.6(+0x7872e)[0x7ffff77ab72e]
/home/lukas/Hacking/c/tinyrl/bin/tinyrl[0x402c88]
/home/lukas/Hacking/c/tinyrl/bin/tinyrl[0x4032f3]
/home/lukas/Hacking/c/tinyrl/bin/tinyrl[0x4021bc]
/usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7ffff7753040]
/home/lukas/Hacking/c/tinyrl/bin/tinyrl[0x400e59]
======= Memory map: ========
00400000-00406000 r-xp 00000000 fe:03 3932165                            /home/lukas/Hacking/c/tinyrl/bin/tinyrl
00606000-00607000 rw-p 00006000 fe:03 3932165                            /home/lukas/Hacking/c/tinyrl/bin/tinyrl
00607000-00676000 rw-p 00000000 00:00 0                                  [heap]
7ffff751d000-7ffff7533000 r-xp 00000000 fe:04 13590                      /usr/lib/libgcc_s.so.1
7ffff7533000-7ffff7732000 ---p 00016000 fe:04 13590                      /usr/lib/libgcc_s.so.1
7ffff7732000-7ffff7733000 rw-p 00015000 fe:04 13590                      /usr/lib/libgcc_s.so.1
7ffff7733000-7ffff78cc000 r-xp 00000000 fe:04 13264                      /usr/lib/libc-2.20.so
7ffff78cc000-7ffff7acc000 ---p 00199000 fe:04 13264                      /usr/lib/libc-2.20.so
7ffff7acc000-7ffff7ad0000 r--p 00199000 fe:04 13264                      /usr/lib/libc-2.20.so
7ffff7ad0000-7ffff7ad2000 rw-p 0019d000 fe:04 13264                      /usr/lib/libc-2.20.so
7ffff7ad2000-7ffff7ad6000 rw-p 00000000 00:00 0 
7ffff7ad6000-7ffff7bd9000 r-xp 00000000 fe:04 13263                      /usr/lib/libm-2.20.so
7ffff7bd9000-7ffff7dd9000 ---p 00103000 fe:04 13263                      /usr/lib/libm-2.20.so
7ffff7dd9000-7ffff7dda000 r--p 00103000 fe:04 13263                      /usr/lib/libm-2.20.so
7ffff7dda000-7ffff7ddb000 rw-p 00104000 fe:04 13263                      /usr/lib/libm-2.20.so
7ffff7ddb000-7ffff7dfd000 r-xp 00000000 fe:04 13237                      /usr/lib/ld-2.20.so
7ffff7ff3000-7ffff7ff8000 rw-p 00000000 00:00 0 
7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0                          [vvar]
7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0                          [vdso]
7ffff7ffc000-7ffff7ffd000 r--p 00021000 fe:04 13237                      /usr/lib/ld-2.20.so
7ffff7ffd000-7ffff7ffe000 rw-p 00022000 fe:04 13237                      /usr/lib/ld-2.20.so
7ffff7ffe000-7ffff7fff000 rw-p 00000000 00:00 0 
7ffffffde000-7ffffffff000 rw-p 00000000 00:00 0                          [stack]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

I recently experienced this strange error when my program quitted. It is related to tb_shutdown() as I found out by using valgrind: valgrind error. I don't have any idea how to fix this yet.

[nsf]

If you call tb_shutdown twice, then it's possible.

[nsf]

And that's what valgrind says..

You call tb_shutdown at main.c:446
==22975== by 0x4032F2: tb_shutdown (termbox.c:143)
==22975== by 0x4021AC: main (main.c:446)

And then again at main.c:451
==22975== by 0x403258: tb_shutdown (termbox.c:135)
==22975== by 0x4021BB: main (main.c:451)

[nsf]

Will add a guard which protects you from doing so..

[sternenseemann]

ah! Thank you.

[sternenseemann]

Guard sounds like a good idea. Actually I called tb_shutdown twice, you are right.