Hi guys, I can reliably crash the VM with the following file if I uncomment the crashes()-function call. Sorry for the formatting. The really most weird thing is that the crash is 'triggered' only if I loop more then 4 times... Following the file you'll find the output of uname -a and chuck --version, and the backtrace. I wasn't sure if I should post here or on the users list, but since I'm a programmer I decided for this list. So let me know if you have any ideas that I could try out. Cheers, Philipp /* chuck file start */ fun int dontCallMe () { } fun int iamOk () { return 0; } fun void crashes () { for (0 => int j; j < 5; j++) { dontCallMe (); 1::ms => now; } } fun void crashesNot () { for (0 => int j; j < 5; j++) { iamOk (); 1::ms => now; } } fun void thisNeither () { for (0 => int j; j < 4; j++) { dontCallMe (); 1::ms => now; } } //crashes (); crashesNot (); thisNeither (); /* chuck file end */ chuck --version: chuck version: 1.3.2.0 (chimera) linux (jack) : 32-bit http://chuck.cs.princeton.edu/ http://chuck.stanford.edu/ uname -a: Linux vostro 3.11.6-1-ARCH #1 SMP PREEMPT Sat Oct 19 00:29:46 CEST 2013 i686 GNU/Linux *** Error in `chuck': double free or corruption (!prev): 0x085399f0 *** ======= Backtrace: ========= /usr/lib/libc.so.6(+0x6d6b3)[0xb72946b3] /usr/lib/libc.so.6(+0x7381a)[0xb729a81a] /usr/lib/libc.so.6(+0x7445c)[0xb729b45c] /usr/lib/libstdc++.so.6(_ZdlPv+0x1f)[0xb7515a0f] /usr/lib/libstdc++.so.6(_ZdaPv+0x1b)[0xb7515a5b] chuck[0x805d572] chuck[0x805d759] chuck[0x805d930] chuck[0x805b82f] chuck[0x805ba08] chuck[0x805bab0] chuck[0x805085d] /usr/lib/libc.so.6(__libc_start_main+0xf3)[0xb72409d3] chuck[0x8052b69] ======= Memory map: ======== 08048000-081bc000 r-xp 00000000 08:09 3151140 /home/philipp/Audio/Chuck/ChuckSource/chuck-1.3.2.0/src/chuck 081bc000-081e3000 rw-p 00173000 08:09 3151140 /home/philipp/Audio/Chuck/ChuckSource/chuck-1.3.2.0/src/chuck 081e3000-08226000 rw-p 00000000 00:00 0 083cb000-0855a000 rw-p 00000000 00:00 0 [heap] b0b00000-b0b21000 rw-p 00000000 00:00 0 b0b21000-b0c00000 ---p 00000000 00:00 0 b0d00000-b0d21000 rw-p 00000000 00:00 0 b0d21000-b0e00000 ---p 00000000 00:00 0 b0e87000-b0e88000 ---p 00000000 00:00 0 b0e88000-b1688000 rw-p 00000000 00:00 0 [stack:9315] b1688000-b1689000 ---p 00000000 00:00 0 b1689000-b1e89000 rw-p 00000000 00:00 0 b6d00000-b6d21000 rw-p 00000000 00:00 0 b6d21000-b6e00000 ---p 00000000 00:00 0 b6e68000-b6e69000 ---p 00000000 00:00 0 b6e69000-b6ee9000 rw-p 00000000 00:00 0 b6ee9000-b6eea000 ---p 00000000 00:00 0 b6eea000-b6f6a000 rw-p 00000000 00:00 0 b6f6a000-b6f6b000 ---p 00000000 00:00 0 b6f6b000-b6fef000 rw-p 00000000 00:00 0 b6fef000-b6ff5000 r-xp 00000000 08:05 161673 /usr/lib/libogg.so.0.8.1 b6ff5000-b6ff6000 r--p 00005000 08:05 161673 /usr/lib/libogg.so.0.8.1 b6ff6000-b6ff7000 rw-p 00006000 08:05 161673 /usr/lib/libogg.so.0.8.1 b6ff7000-b7021000 r-xp 00000000 08:05 152013 /usr/lib/libvorbis.so.0.4.6 b7021000-b7022000 r--p 00029000 08:05 152013 /usr/lib/libvorbis.so.0.4.6 b7022000-b7023000 rw-p 0002a000 08:05 152013 /usr/lib/libvorbis.so.0.4.6 b7023000-b7189000 r-xp 00000000 08:05 152016 /usr/lib/libvorbisenc.so.2.0.9 b7189000-b719a000 r--p 00165000 08:05 152016 /usr/lib/libvorbisenc.so.2.0.9 b719a000-b719b000 rw-p 00176000 08:05 152016 /usr/lib/libvorbisenc.so.2.0.9 b719b000-b71cf000 r-xp 00000000 08:05 151995 /usr/lib/libFLAC.so.8.3.0 b71cf000-b71d0000 r--p 00034000 08:05 151995 /usr/lib/libFLAC.so.8.3.0 b71d0000-b71d1000 rw-p 00035000 08:05 151995 /usr/lib/libFLAC.so.8.3.0 b71d1000-b721b000 r-xp 00000000 08:05 139847 /usr/lib/libdbus-1.so.3.7.5 b721b000-b721c000 r--p 00049000 08:05 139847 /usr/lib/libdbus-1.so.3.7.5 b721c000-b721d000 rw-p 0004a000 08:05 139847 /usr/lib/libdbus-1.so.3.7.5 b721d000-b721e000 rw-p 00000000 00:00 0 b721e000-b7225000 r-xp 00000000 08:05 133596 /usr/lib/librt-2.18.so b7225000-b7226000 r--p 00006000 08:05 133596 /usr/lib/librt-2.18.so b7226000-b7227000 rw-p 00007000 08:05 133596 /usr/lib/librt-2.18.so b7227000-b73d0000 r-xp 00000000 08:05 132898 /usr/lib/libc-2.18.so b73d0000-b73d1000 ---p 001a9000 08:05 132898 /usr/lib/libc-2.18.so b73d1000-b73d3000 r--p 001a9000 08:05 132898 /usr/lib/libc-2.18.so b73d3000-b73d4000 rw-p 001ab000 08:05 132898 /usr/lib/libc-2.18.so b73d4000-b73d7000 rw-p 00000000 00:00 0 b73d7000-b73f2000 r-xp 00000000 08:05 133144 /usr/lib/libgcc_s.so.1 b73f2000-b73f3000 rw-p 0001a000 08:05 133144 /usr/lib/libgcc_s.so.1 b73f3000-b7437000 r-xp 00000000 08:05 132897 /usr/lib/libm-2.18.so b7437000-b7438000 r--p 00043000 08:05 132897 /usr/lib/libm-2.18.so b7438000-b7439000 rw-p 00044000 08:05 132897 /usr/lib/libm-2.18.so b7439000-b7451000 r-xp 00000000 08:05 132847 /usr/lib/libpthread-2.18.so b7451000-b7452000 r--p 00017000 08:05 132847 /usr/lib/libpthread-2.18.so b7452000-b7453000 rw-p 00018000 08:05 132847 /usr/lib/libpthread-2.18.so b7453000-b7456000 rw-p 00000000 00:00 0 b7456000-b74c1000 r-xp 00000000 08:05 152046 /usr/lib/libsndfile.so.1.0.25 b74c1000-b74c3000 r--p 0006a000 08:05 152046 /usr/lib/libsndfile.so.1.0.25 b74c3000-b74c4000 rw-p 0006c000 08:05 152046 /usr/lib/libsndfile.so.1.0.25 b74c4000-b74c8000 rw-p 00000000 00:00 0 b74c8000-b74cb000 r-xp 00000000 08:05 133597 /usr/lib/libdl-2.18.so b74cb000-b74cc000 r--p 00002000 08:05 133597 /usr/lib/libdl-2.18.so b74cc000-b74cd000 rw-p 00003000 08:05 133597 /usr/lib/libdl-2.18.so b74cd000-b75aa000 r-xp 00000000 08:05 133135 /usr/lib/libstdc++.so.6.0.18 b75aa000-b75ae000 r--p 000dc000 08:05 133135 /usr/lib/libstdc++.so.6.0.18 b75ae000-b75af000 rw-p 000e0000 08:05 133135 /usr/lib/libstdc++.so.6.0.18 b75af000-b75b6000 rw-p 00000000 00:00 0 b75b6000-b75fa000 r-xp 00000000 08:05 172795 /usr/lib/libjack.so.0.1.0 b75fa000-b75fc000 r--p 00043000 08:05 172795 /usr/lib/libjack.so.0.1.0 b75fc000-b75fd000 rw-p 00045000 08:05 172795 /usr/lib/libjack.so.0.1.0 b75fd000-b76f1000 r-xp 00000000 08:05 139859 /usr/lib/libasound.so.2.0.0 b76f1000-b76f5000 r--p 000f3000 08:05 139859 /usr/lib/libasound.so.2.0.0 b76f5000-b76f6000 rw-p 000f7000 08:05 139859 /usr/lib/libasound.so.2.0.0 b770d000-b771f000 rw-s 00000000 00:10 17126 /dev/shm/jack-shm-registry b7721000-b7723000 rw-p 00000000 00:00 0 b7723000-b7724000 r-xp 00000000 00:00 0 [vdso] b7724000-b7744000 r-xp 00000000 08:05 132873 /usr/lib/ld-2.18.so b7744000-b7745000 r--p 0001f000 08:05 132873 /usr/lib/ld-2.18.so b7745000-b7746000 rw-p 00020000 08:05 132873 /usr/lib/ld-2.18.so bfcd6000-bfcf7000 rw-p 00000000 00:00 0 [stack] zsh: abort (core dumped) chuck debug.ck