core dump when execute lv2_file_generator on arch linux

[xunil-cloud]

Describe your environment
Arch linux 64bit

Describe the problem or the feature request
Since I want to create package(AUR) on arch linux, I try to compile the source. I get core dump when lv2_file_generator is executed via camomile shell script. The strange thing is that I don't get such error using the release version 1.0.7. Can anyone help me?

error messages:

Camomile - Plugin Generator
./builds/AlmondOrgan.vst3
generating ttl AlmondOrgan in ./builds/AlmondOrgan.lv2/AlmondOrgan.so
./camomile: line 243:  3791 Segmentation fault      (core dumped) LD_LIBRARY_PATH=$PWD "$ThisPath/lv2_file_generator" "$plugin_output_dir/$plugin_name.lv2/$plugin_name.$LinuxLV2Extension" $plugin_name
mv: cannot stat '/home/billson/src/Camomile/Plugins/manifest.ttl': No such file or directory
mv: cannot stat '/home/billson/src/Camomile/Plugins/AlmondOrgan.ttl': No such file or directory
./builds/AlmondOrgan.lv2

gdb output (run lv2_file_generator directly):

(gdb) run builds/AlmondOrgan.lv2/AlmondOrgan.so AlmondOrgan
Starting program: /home/billson/src/Camomile/Plugins/lv2_file_generator builds/AlmondOrgan.lv2/AlmondOrgan.so AlmondOrgan
generating ttl AlmondOrgan in builds/AlmondOrgan.lv2/AlmondOrgan.so
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff724957a in std::ostream::sentry::sentry (this=0x7fffffffd470,
    __os=...)
    at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/ostream.tcc:46
46	/build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/ostream.tcc: No such file or directory.
(gdb) bt
#0  0x00007ffff724957a in std::ostream::sentry::sentry (
    this=0x7fffffffd470, __os=...)
    at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/ostream.tcc:46
#1  0x00007ffff7249c8d in std::__ostream_insert<char, std::char_traits<char> > (__out=..., __s=__s@entry=0x555555579140 "Camomile: AlmondOrgan",
    __n=21)
    at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/ostream_insert.h:76
#2  0x00007ffff724a15e in std::operator<< <std::char_traits<char> > (
    __out=..., __s=0x555555579140 "Camomile: AlmondOrgan")
    at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/char_traits.h:357
#3  0x00007ffff75ac1cc in juce::operator<< <std::char_traits<char> > (
    stream=..., stringToWrite=...)
    at ../../../Juce/modules/juce_core/text/juce_String.h:1570
#4  0x00007ffff76661e6 in juce::Logger::outputDebugString (text=...)
    at ../../../Juce/modules/juce_core/native/juce_linux_SystemStats.cpp:32
#5  0x00007ffff75299f5 in CamomileEnvironment::CamomileEnvironment (
    this=0x7ffff7db4fa0 <CamomileEnvironment::get()::env>)
    at ../../../Source/PluginEnvironment.cpp:222
--Type <RET> for more, q to quit, c to continue without paging--
#6  0x00007ffff7528a92 in CamomileEnvironment::get ()
    at ../../../Source/PluginEnvironment.cpp:22
#7  0x00007ffff7528afb in CamomileEnvironment::getPluginNameUTF8 ()
    at ../../../Source/PluginEnvironment.cpp:32
#8  0x00007ffff74f6e36 in __static_initialization_and_destruction_0 (
    __initialize_p=1, __priority=65535)
    at ../../JuceLibraryCode/../JuceLibraryCode/../../Source/PluginConfig.h:24
#9  0x00007ffff74f7813 in _GLOBAL__sub_I_PluginProcessor.cpp(void) ()
    at ../../../Source/PluginProcessor.cpp:652
#10 0x00007ffff7fe12de in call_init.part ()
   from /lib64/ld-linux-x86-64.so.2
#11 0x00007ffff7fe13c8 in _dl_init () from /lib64/ld-linux-x86-64.so.2
#12 0x00007ffff7f020e5 in _dl_catch_exception () from /usr/lib/libc.so.6
#13 0x00007ffff7fe5705 in dl_open_worker ()
   from /lib64/ld-linux-x86-64.so.2
#14 0x00007ffff7f02088 in _dl_catch_exception () from /usr/lib/libc.so.6
#15 0x00007ffff7fe4f3e in _dl_open () from /lib64/ld-linux-x86-64.so.2
#16 0x00007ffff7f9134c in ?? () from /usr/lib/libdl.so.2
#17 0x00007ffff7f02088 in _dl_catch_exception () from /usr/lib/libc.so.6
#18 0x00007ffff7f02153 in _dl_catch_error () from /usr/lib/libc.so.6
#19 0x00007ffff7f91b89 in ?? () from /usr/lib/libdl.so.2
--Type <RET> for more, q to quit, c to continue without paging--
#20 0x00007ffff7f913d8 in dlopen () from /usr/lib/libdl.so.2
#21 0x00005555555551f6 in main ()

[pierreguillot]

How did you compile the plugins and the lv2_file_generator?

[xunil-cloud]

I mainly followed the instructions from the README.md file.

cd Dependencies/LibPdBuild/LinuxMakefile && cmake .. -DCMAKE_BUILD_TYPE=Release && cd ../../..
make

terminal output when I run make command

Then I go into Plugins directory and run ./camomile -f ./Examples/AlmondOrgan/. I got above error messages.

Thanks in advance.

[pierreguillot]

Can you try to build in release mode make CONFIG=Release?

[xunil-cloud]

Yep, I try that and now I can generate lv2 plugins successfully!

[pierreguillot]

I would like to fix the debug problem but I can't reproduce it. Could you change the line 222 of PluginEnvironment.cpp:
DBG("Camomile: " + plugin_name);?
Perhaps if you use DBG("Camomile: " << plugin_name); instead, it will fix the problem. Could you let me know if you find a solution?

[xunil-cloud]

Could you let me know if you find a solution?

Ok.

Could you change the line 222 of PluginEnvironment.cpp:
DBG("Camomile: " + plugin_name);?
Perhaps if you use DBG("Camomile: " << plugin_name); instead, it will fix the problem.

I will try this as soon as possible, maybe tomorrow.

[xunil-cloud]

No, it still have the same error. However, this line does matter. I try to comment out this line, and I don't get such error.

[xunil-cloud]

It seems that we can't print anything here. I also try to use std::cout to print messages. If I do that, using make CONFIG=Release instead of make won't get rid of core dump error.

[pierreguillot]

In fact, I guess the problem is related to that https://unix.stackexchange.com/questions/246143/gdb-throws-error-on-arch-linux. I'm not sure that related to Camomile. Can you test the solution suggested and confirm? Thank you!

[xunil-cloud]

Not sure that really related to Camomile, since I also have error when runing lv2_file_generator without gdb. I try to strip the libstdc++ library, but it doesn't fix the problem.

[xunil-cloud]

Since you said you couldn't reproduce it, I wander what distro or environment do you use to make a release on Linux?

[pierreguillot]

I use Travis CI to create the release, on can have the information on the build: https://travis-ci.org/github/pierreguillot/Camomile/jobs/726739582.

[pierreguillot]

This is fixed on dev/v1.0.8.