With 'tap-plugins' installed, the 'listplugins' command fails with the following printed in the console. I have verified that uninstalling tap-plugins allows listplugins to finish without error.
*** Error in `listplugins': free(): invalid pointer: 0x00000038b21c18b8 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6[0x38b1e80996]
/usr/lib/ladspa/tap_tremolo.so(delete_descriptor+0x19)[0x7f1ed2ea9179]
/lib64/ld-linux-x86-64.so.2[0x38b1a14bf0]
/lib64/ld-linux-x86-64.so.2[0x38b1a138a3]
/lib/x86_64-linux-gnu/libdl.so.2[0x38b2201026]
/lib64/ld-linux-x86-64.so.2[0x38b1a0f6e6]
/lib/x86_64-linux-gnu/libdl.so.2[0x38b220163c]
/lib/x86_64-linux-gnu/libdl.so.2(dlopen+0x31)[0x38b22010c1]
listplugins[0x400c20]
listplugins[0x4009be]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x38b1e21de5]
listplugins[0x4009ee]
======= Memory map: ========
00400000-00402000 r-xp 00000000 08:03 1327546 /usr/bin/listplugins
00601000-00602000 r--p 00001000 08:03 1327546 /usr/bin/listplugins
00602000-00603000 rw-p 00002000 08:03 1327546 /usr/bin/listplugins
00991000-009b2000 rw-p 00000000 00:00 0 [heap]
38b1a00000-38b1a23000 r-xp 00000000 08:03 2514485 /lib/x86_64-linux-gnu/ld-2.17.so
38b1c22000-38b1c23000 r--p 00022000 08:03 2514485 /lib/x86_64-linux-gnu/ld-2.17.so
38b1c23000-38b1c25000 rw-p 00023000 08:03 2514485 /lib/x86_64-linux-gnu/ld-2.17.so
38b1e00000-38b1fbd000 r-xp 00000000 08:03 2514486 /lib/x86_64-linux-gnu/libc-2.17.so
38b1fbd000-38b21bd000 ---p 001bd000 08:03 2514486 /lib/x86_64-linux-gnu/libc-2.17.so
38b21bd000-38b21c1000 r--p 001bd000 08:03 2514486 /lib/x86_64-linux-gnu/libc-2.17.so
38b21c1000-38b21c3000 rw-p 001c1000 08:03 2514486 /lib/x86_64-linux-gnu/libc-2.17.so
38b21c3000-38b21c8000 rw-p 00000000 00:00 0
38b2200000-38b2203000 r-xp 00000000 08:03 2514490 /lib/x86_64-linux-gnu/libdl-2.17.so
38b2203000-38b2402000 ---p 00003000 08:03 2514490 /lib/x86_64-linux-gnu/libdl-2.17.so
38b2402000-38b2403000 r--p 00002000 08:03 2514490 /lib/x86_64-linux-gnu/libdl-2.17.so
38b2403000-38b2404000 rw-p 00003000 08:03 2514490 /lib/x86_64-linux-gnu/libdl-2.17.so
3cdda00000-3cdda15000 r-xp 00000000 08:03 2518237 /lib/x86_64-linux-gnu/libgcc_s.so.1
3cdda15000-3cddc14000 ---p 00015000 08:03 2518237 /lib/x86_64-linux-gnu/libgcc_s.so.1
3cddc14000-3cddc15000 r--p 00014000 08:03 2518237 /lib/x86_64-linux-gnu/libgcc_s.so.1
3cddc15000-3cddc16000 rw-p 00015000 08:03 2518237 /lib/x86_64-linux-gnu/libgcc_s.so.1
7f1ed27c6000-7f1ed2ea8000 r--p 00000000 08:03 1318167 /usr/lib/locale/locale-archive
7f1ed2ea8000-7f1ed2eaa000 r-xp 00000000 08:03 2391445 /usr/lib/ladspa/tap_tremolo.so
7f1ed2eaa000-7f1ed30a9000 ---p 00002000 08:03 2391445 /usr/lib/ladspa/tap_tremolo.so
7f1ed30a9000-7f1ed30aa000 r--p 00001000 08:03 2391445 /usr/lib/ladspa/tap_tremolo.so
7f1ed30aa000-7f1ed30ab000 rw-p 00002000 08:03 2391445 /usr/lib/ladspa/tap_tremolo.so
7f1ed30ab000-7f1ed30af000 rw-p 00000000 00:00 0
7f1ed30e7000-7f1ed30eb000 rw-p 00000000 00:00 0
7fff0c5c0000-7fff0c5e1000 rw-p 00000000 00:00 0 [stack]
7fff0c5fe000-7fff0c600000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Aborted (core dumped)
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: tap-plugins 0.7.2-1
ProcVersionSignature: Ubuntu 3.11.0-15.25~ppa2-generic-tuxonice 3.11.10
Uname: Linux 3.11.0-15-generic-tuxonice x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Fri Feb 14 19:13:44 2014
Dependencies:
gcc-4.8-base 4.8.1-10ubuntu9
libc6 2.17-93ubuntu4 [modified: lib/x86_64-linux-gnu/ld-2.17.so lib/x86_64-linux-gnu/libc-2.17.so lib/x86_64-linux-gnu/libcrypt-2.17.so lib/x86_64-linux-gnu/libdl-2.17.so lib/x86_64-linux-gnu/libm-2.17.so lib/x86_64-linux-gnu/libnsl-2.17.so lib/x86_64-linux-gnu/libpthread-2.17.so lib/x86_64-linux-gnu/libresolv-2.17.so lib/x86_64-linux-gnu/librt-2.17.so lib/x86_64-linux-gnu/libutil-2.17.so]
libgcc1 1:4.8.1-10ubuntu9 [modified: lib/x86_64-linux-gnu/libgcc_s.so.1]
multiarch-support 2.17-93ubuntu4
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-11-10 (96 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: tap-plugins
UpgradeStatus: No upgrade log present (probably fresh install)