mkvtoolnix errors

[temp@…]

I can't use mkvextract. Haven't tried the other parts of mkvtoolnix. Known problem yet?

Mountain Lion 10.8.3

% port version
Version: 2.1.3

% port list | grep mkv
mkvtoolnix                     @5.8.0          multimedia/mkvtoolnix

% mkvextract tracks file.mkv -c us-ascii 2:file.srt 
mkvextract(65084) malloc: *** error for object 0x7fff797d5570: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort

% mkvextract --version
mkvextract v5.8.0 ('No Sleep / Pillow') built on Mar 20 2013 10:50:54

% uname -a
Darwin bigboy.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan  6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64

% gcc -v
Using built-in specs.
Target: i686-apple-darwin11
Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2336.11~148/src/configure --disable-checking --enable-werror --prefix=/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2336.11~148/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)

[ryandesign (Ryan Carsten Schmidt)]

Duplicate of #34806.