Here are the details from one of these render crashes:

Rendering of (FILE NAME REDACTED).avi crashed
*** glibc detected *** /usr/bin/melt: free(): invalid pointer: 0x00007ff3b981a2a8 ***
======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x78a36)[0x7ff3b94f8a36] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7ff3b94fcd1c] /usr/lib/ladspa/tap_deesser.so(delete_descriptor+0x17)[0x7ff3b4ca9e87] /lib64/ld-linux-x86-64.so.2(+0x13bfe)[0x7ff3b9c7bbfe] /lib64/ld-linux-x86-64.so.2(+0x13414)[0x7ff3b9c7b414] /lib/x86_64-linux-gnu/libdl.so.2(+0xf26)[0x7ff3b9278f26] /lib64/ld-linux-x86-64.so.2(+0xe996)[0x7ff3b9c76996] /lib/x86_64-linux-gnu/libdl.so.2(+0x152f)[0x7ff3b927952f] /lib/x86_64-linux-gnu/libdl.so.2(dlopen+0x31)[0x7ff3b9278fc1] /usr/lib/mlt/libmltjackrack.so(+0x7eea)[0x7ff3b599feea] /usr/lib/mlt/libmltjackrack.so(plugin_mgr_new+0xbb)[0x7ff3b59a025b] /usr/lib/mlt/libmltjackrack.so(mlt_register+0x18)[0x7ff3b599cbd8] /usr/lib/libmlt.so.4(mlt_repository_init+0xbd)[0x7ff3b9a5ac9d] /usr/lib/libmlt.so.4(mlt_factory_init+0x267)[0x7ff3b9a5a427] /usr/bin/melt[0x402289] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7ff3b94a130d] /usr/bin/melt[0x403379] ======= Memory map: ========
00400000-00406000 r-xp 00000000 fd:01 180750 /usr/bin/melt 00606000-00607000 r--p 00006000 fd:01 180750 /usr/bin/melt 00607000-00608000 rw-p 00007000 fd:01 180750 /usr/bin/melt 00daa000-00e2e000 rw-p 00000000 00:00 0 [heap] 7ff3b0000000-7ff3b0021000 rw-p 00000000 00:00 0 7ff3b0021000-7ff3b4000000 ---p 00000000 00:00 0 7ff3b4ca8000-7ff3b4cab000 r-xp 00000000 fd:01 267263 /usr/lib/ladspa/tap_deesser.so 7ff3b4cab000-7ff3b4eaa000 ---p 00003000 fd:01 267263 /usr/lib/ladspa/tap_deesser.so 7ff3b4eaa000-7ff3b4eab000 r--p 00002000 fd:01 267263 /usr/lib/ladspa/tap_deesser.so 7ff3b4eab000-7ff3b4eac000 rw-p 00003000 fd:01 267263 /usr/lib/ladspa/tap_deesser.so 7ff3b4eac000-7ff3b4eb4000 rw-p 00000000 00:00 0 7ff3b4eb8000-7ff3b4ef4000 r-xp 00000000 fd:01 528938 /lib/x86_64-linux-gnu/libpcre.so.3.12.1 7ff3b4ef4000-7ff3b50f3000 ---p 0003c000 fd:01 528938 /lib/x86_64-linux-gnu/libpcre.so.3.12.1 7ff3b50f3000-7ff3b50f4000 r--p 0003b000 fd:01 528938 /lib/x86_64-linux-gnu/libpcre.so.3.12.1 7ff3b50f4000-7ff3b50f5000 rw-p 0003c000 fd:01 528938 /lib/x86_64-linux-gnu/libpcre.so.3.12.1 7ff3b50f8000-7ff3b51e9000 r-xp 00000000 fd:01 528797 /lib/x86_64-linux-gnu/libglib-2.0.so.0.3108.0 7ff3b51e9000-7ff3b53e8000 ---p 000f1000 fd:01 528797 /lib/x86_64-linux-gnu/libglib-2.0.so.0.3108.0 7ff3b53e8000-7ff3b53e9000 r--p 000f0000 fd:01 528797 /lib/x86_64-linux-gnu/libglib-2.0.so.0.3108.0 7ff3b53e9000-7ff3b53ea000 rw-p 000f1000 fd:01 528797 /lib/x86_64-linux-gnu/libglib-2.0.so.0.3108.0 7ff3b53ea000-7ff3b53eb000 rw-p 00000000 00:00 0 7ff3b53f0000-7ff3b5541000 r-xp 00000000 fd:01 395679 /usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8 7ff3b5541000-7ff3b5740000 ---p 00151000 fd:01 395679 /usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8 7ff3b5740000-7ff3b5748000 r--p 00150000 fd:01 395679 /usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8 7ff3b5748000-7ff3b574a000 rw-p 00158000 fd:01 395679 /usr/lib/x86_64-linux-gnu/libxml2.so.2.7.8 7ff3b574a000-7ff3b574b000 rw-p 00000000 00:00 0 7ff3b5750000-7ff3b578e000 r-xp 00000000 fd:01 415918 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0 7ff3b578e000-7ff3b598e000 ---p 0003e000 fd:01 415918 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0 7ff3b598e000-7ff3b5990000 r--p 0003e000 fd:01 415918 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0 7ff3b5990000-7ff3b5991000 rw-p 00040000 fd:01 415918 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0 7ff3b5998000-7ff3b59a6000 r-xp 00000000 fd:01 535877 /usr/lib/mlt/libmltjackrack.so 7ff3b59a6000-7ff3b5ba5000 ---p 0000e000 fd:01 535877 /usr/lib/mlt/libmltjackrack.so 7ff3b5
ba5000-7ff3b5ba6000 r--p 0000d000 fd:01 535877 /usr/lib/mlt/libmltjackrack.so 7ff3b5ba6000-7ff3b5ba7000 rw-p 0000e000 fd:01 535877 /usr/lib/mlt/libmltjackrack.so 7ff3b5ba8000-7ff3b5bc2000 r-xp 00000000 fd:01 415935 /usr/lib/x86_64-linux-gnu/libdv.so.4.0.3 7ff3b5bc2000-7ff3b5dc1000 ---p 0001a000 fd:01 415935 /usr/lib/x86_64-linux-gnu/libdv.so.4.0.3 7ff3b5dc1000-7ff3b5dc2000 r--p 00019000 fd:01 415935 /usr/lib/x86_64-linux-gnu/libdv.so.4.0.3 7ff3b5dc2000-7ff3b5dc4000 rw-p 0001a000 fd:01 415935 /usr/lib/x86_64-linux-gnu/libdv.so.4.0.3 7ff3b5dc4000-7ff3b5dd2000 rw-p 00000000 00:00 0 7ff3b5dd8000-7ff3b5ddd000 r-xp 00000000 fd:01 535862 /usr/lib/mlt/libmltdv.so 7ff3b5ddd000-7ff3b5fdc000 ---p 00005000 fd:01 535862 /usr/lib/mlt/libmltdv.so 7ff3b5fdc000-7ff3b5fdd000 r--p 00004000 fd:01 535862 /usr/lib/mlt/libmltdv.so 7ff3b5fdd000-7ff3b5fde000 rw-p 00005000 fd:01 535862 /usr/lib/mlt/libmltdv.so 7ff3b5fe0000-7ff3b5ffc000 r-xp 00000000 fd:01 535867 /usr/lib/mlt/libmltcore.so 7ff3b5ffc000-7ff3b61fc000 ---p 0001c000 fd:01 535867 /usr/lib/mlt/libmltcore.so 7ff3b61fc000-7ff3b61fd000 r--p 0001c000 fd:01 535867 /usr/lib/mlt/libmltcore.so 7ff3b61fd000-7ff3b61fe000 rw-p 0001d000 fd:01 535867 /usr/lib/mlt/libmltcore.so 7ff3b6200000-7ff3b6235000 r-xp 00000000 fd:01 398473 /usr/lib/x86_64-linux-gnu/libquadmath.so.0.0.0 7ff3b6235000-7ff3b6434000 ---p 00035000 fd:01 398473 /usr/lib/x86_64-linux-gnu/libquadmath.so.0.0.0 7ff3b6434000-7ff3b6435000 r--p 00034000 fd:01 398473 /usr/lib/x86_64-linux-gnu/libquadmath.so.0.0.0 7ff3b6435000-7ff3b6436000 rw-p 00035000 fd:01 398473 /usr/lib/x86_64-linux-gnu/libquadmath.so.0.0.0 7ff3b6438000-7ff3b654c000 r-xp 00000000 fd:01 398469 /usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0 7ff3b654c000-7ff3b674c000 ---p 00114000 fd:01 398469 /usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0 7ff3b674c000-7ff3b674d000 r--p 00114000 fd:01 398469 /usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0 7ff3b674d000-7ff3b674f000 rw-p 00115000 fd:01 398469 /usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0 7ff3b6750000-7ff3b67e9000 r-xp 00000000 fd:01 412648 /usr/lib/libblas/libblas.so.3gf.0 7ff3b67e9000-7ff3b69e8000 ---p 00099000 fd:01 412648 /usr/lib/libblas/libblas.so.3gf.0 7ff3b69e8000-7ff3b69e9000 r--p 00098000 fd:01 412648 /usr/lib/libblas/libblas.so.3gf.0 7ff3b69e9000-7ff3b69ea000 rw-p 00099000 fd:01 412648 /usr/lib/libblas/libblas.so.3gf.0 7ff3b69f0000-7ff3b6a06000 r-xp 00000000 fd:01 528915 /lib/x86_64-linux-gnu/libz.so.1.2.3.4 7ff3b6a06000-7ff3b6c05000 ---p 00016000 fd:01 528915 /lib/x86_64-linux-gnu/libz.so.1.2.3.4 7ff3b6c05000-7ff3b6c06000 r--p 00015000 fd:01 528915 /lib/x86_64-linux-gnu/libz.so.1.2.3.4 7ff3b6c06000-7ff3b6c07000 rw-p 00016000 fd:01 528915 /lib/x86_64-linux-gnu/libz.so.1.2.3.4 7ff3b6c08000-7ff3b74ed000 r-xp 00000000 fd:01 194334 /usr/lib/lapack/liblapack.so.3gf.0 7ff3b74ed000-7ff3b76ec000 ---p 008e5000 fd:01 194334 /usr/lib/lapack/liblapack.so.3gf.0 7ff3b76ec000-7ff3b76ed000 r--p 008e4000 fd:01 194334 /usr/lib/lapack/liblapack.so.3gf.0 7ff3b76ed000-7ff3b76f1000 rw-p 008e5000 fd:01 194334 /usr/lib/lapack/liblapack.so.3gf.0 7ff3b76f1000-7ff3b77fe000 rw-p 00000000 00:00 0 7ff3b7800000-7ff3b79c8000 r-xp 00000000 fd:01 194247 /usr/lib/libcxcore.so.2.1.0 7ff3b79c8000-7ff3b7bc8000 ---p 001c8000 fd:01 194247 /usr/lib/libcxcore.so.2.1.0 7ff3b7bc8000-7ff3b7bcb000 r--p 001c8000 fd:01 194247 /usr/lib/libcxcore.so.2.1.0 7ff3b7bcb000-7ff3b7bd2000 rw-p 001cb000 fd:01 194247 /usr/lib/libcxcore.so.2.1.0 7ff3b7bd2000-7ff3b7bd4000 rw-p 00000000 00:00 0 7ff3b7bd8000-7ff3b7e67000 r-xp 00000000 fd:01 193962 /usr/lib/libcv.so.2.1.0 7ff3b7e67000-7ff3b8067000 ---p 0028f000 fd:01 193962 /usr/lib/libcv.so.2.1.0 7ff3b8067000-7ff3b806b000 r--p 0028f000 fd:01 193962 /usr/lib/libcv.so.2.1.0 7ff3b806b000-7ff3b806c000 rw-p 00293000 fd:01 193962 /usr/lib/libcv.so.2.1.0 7ff3b806c000-7ff3b80f3000 rw-p 00000000 00:00 0 7ff3b8100000-7ff3b8105000 r-xp 00000000 fd:01 535864 /usr/lib/mlt/libmltdgraft.so 7ff3b8105000-7ff3b8304000 ---p 00005000 fd:01 535864 /usr/lib/mlt/libmltdgraft.so 7ff3b8304000-7ff3b8305000 r--p 00004000 fd:01 535864 /usr/lib/mlt/libmltdgraft.so 7ff3b8305000-7ff3b8306000 rw-p 00005000 fd:01 535864 /usr/lib/mlt/libmltdgraft.so 7ff3b8308000-7ff3b831d000 r-xp 00000000 fd:01 528907 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ff3b831d000-7ff3b851c000 ---p 00015000 fd:01 528907 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ff3b851c000-7ff3b851d000 r--p 00014000 fd:01 528907 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ff3b851d000-7ff3b851e000 rw-p 00015000 fd:01 528907 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ff3b8520000-7ff3b8602000 r-xp 00000000 fd:01 409244 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7ff3b8602000-7ff3b8801000 ---p 000e2000 fd:01 409244 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7ff3b8801000-7ff3b8809000 r--p 000e1000 fd:01 409244 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7ff3b8809000-7ff3b880b000 rw-p 000e9000 fd:01 409244 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16 7ff3b880b000-7ff3b8820000 rw-p 00000000 00:00 0 7ff3b8820000-7ff3b8827000 r-xp 00000000 fd:01 546870 /lib/x86_64-linux-gnu/librt-2.13.so 7ff3b8827000-7ff3b8a26000 ---p 00007000 fd:01 546870 /lib/x86_64-linux-gnu/librt-2.13.so 7ff3b8a26000-7ff3b8a27000 r--p 00006000 fd:01 546870 /lib/x86_64-linux-gnu/librt-2.13.so 7ff3b8a27000-7ff3b8a28000 rw-p 00007000 fd:01 546870 /lib/x86_64-linux-gnu/librt-2.13.so 7ff3b8a28000-7ff3b8aab000 r-xp 00000000 fd:01 547417 /lib/x86_64-linux-gnu/libm-2.13.so 7ff3b8aab000-7ff3b8caa000 ---p 00083000 fd:01 547417 /lib/x86_64-linux-gnu/libm-2.13.so 7ff3b8caa000-7ff3b8cab000 r--p 00082000 fd:01 547417 /lib/x86_64-linux-gnu/libm-2.13.so 7ff3b8cab000-7ff3b8cac000 rw-p 00083000 fd:01 547417 /lib/x86_64-linux-gnu/libm-2.13.so 7ff3b8cb0000-7ff3b8cb5000 r-xp 00000000 fd:01 535855 /usr/lib/mlt/libmltfrei0r.so 7ff3b8cb5000-7ff3b8eb4000 ---p 00005000 fd:01 535855 /usr/lib/mlt/libmltfrei0r.so 7ff3b8eb4000-7ff3b8eb5000 r--p 00004000 fd:01 535855 /usr/lib/mlt/libmltfrei0r.so 7ff3b8eb5000-7ff3b8eb6000 rw-p 00005000 fd:01 535855 /usr/lib/mlt/libmltfrei0r.so 7ff3b8eb8000-7ff3b9278000 r--p 00000000 fd:01 193319 /usr/lib/locale/locale-archive 7ff3b9278000-7ff3b927a000 r-xp 00000000 fd:01 547231 /lib/x86_64-linux-gnu/libdl-2.13.so 7ff3b927a000-7ff3b947a000 ---p 00002000 fd:01 547231 /lib/x86_64-linux-gnu/libdl-2.13.so 7ff3b947a000-7ff3b947b000 r--p 00002000 fd:01 547231 /lib/x86_64-linux-gnu/libdl-2.13.so 7ff3b947b000-7ff3b947c000 rw-p 00003000 fd:01 547231 /lib/x86_64-linux-gnu/libdl-2.13.so 7ff3b9480000-7ff3b9615000 r-xp 00000000 fd:01 547227 /lib/x86_64-linux-gnu/libc-2.13.so 7ff3b9615000-7ff3b9814000 ---p 00195000 fd:01 547227 /lib/x86_64-linux-gnu/libc-2.13.so 7ff3b9814000-7ff3b9818000 r--p 00194000 fd:01 547227 /lib/x86_64-linu
x-gnu/libc-2.13.so 7ff3b9818000-7ff3b9819000 rw-p 00198000 fd:01 547227 /lib/x86_64-linux-gnu/libc-2.13.so 7ff3b9819000-7ff3b981f000 rw-p 00000000 00:00 0 7ff3b9820000-7ff3b9838000 r-xp 00000000 fd:01 547334 /lib/x86_64-linux-gnu/libpthread-2.13.so 7ff3b9838000-7ff3b9a37000 ---p 00018000 fd:01 547334 /lib/x86_64-linux-gnu/libpthread-2.13.so 7ff3b9a37000-7ff3b9a38000 r--p 00017000 fd:01 547334 /lib/x86_64-linux-gnu/libpthread-2.13.so 7ff3b9a38000-7ff3b9a39000 rw-p 00018000 fd:01 547334 /lib/x86_64-linux-gnu/libpthread-2.13.so 7ff3b9a39000-7ff3b9a3d000 rw-p 00000000 00:00 0 7ff3b9a40000-7ff3b9a64000 r-xp 00000000 fd:01 139797 /usr/lib/libmlt.so.0.7.7 7ff3b9a64000-7ff3b9c63000 ---p 00024000 fd:01 139797 /usr/lib/libmlt.so.0.7.7 7ff3b9c63000-7ff3b9c64000 r--p 00023000 fd:01 139797 /usr/lib/libmlt.so.0.7.7 7ff3b9c64000-7ff3b9c65000 rw-p 00024000 fd:01 139797 /usr/lib/libmlt.so.0.7.7 7ff3b9c68000-7ff3b9c89000 r-xp 00000000 fd:01 547284 /lib/x86_64-linux-gnu/ld-2.13.so 7ff3b9e85000-7ff3b9e88000 rw-p 00000000 00:00 0 7ff3b9e88000-7ff3b9e89000 r--p 00020000 fd:01 547284 /lib/x86_64-linux-gnu/ld-2.13.so 7ff3b9e89000-7ff3b9e8b000 rw-p 00021000 fd:01 547284 /lib/x86_64-linux-gnu/ld-2.13.so 7ff3b9e8b000-7ff3b9e8e000 rw-p 00000000 00:00 0 7fff9d590000-7fff9d5b1000 rw-p 00000000 00:00 0 [stack] 7fff9d600000-7fff9d601000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]