scsynth doesn't start

[willbasky]

System: Kubuntu 18.04
SC version: 3.10.2
SC3 version: 3.10

SC server stop to load today. I launched before. It launch if I deleted sc3-plugins.

Error message:

*** Welcome to SuperCollider 3.10.2. *** For help press Ctrl-D.
Booting server 'localhost' on address 127.0.0.1:57110.
Faust: supercollider.cpp: sc_api_version = 3
Faust: FaustGreyholeRaw numControls=7
SCDoc: Indexing help-files...
Server 'localhost' exited with exit code 0.
SCDoc: Indexed 1923 documents in 1.12 seconds

[willbasky]

starting scsynch manually from cmd (after sc launched) returns:

$ scsynth -u 57110 -V -2
Faust: supercollider.cpp: sc_api_version = 3
Faust: FaustGreyholeRaw numControls=7
free(): invalid pointer

What pointer?

[willbasky]

I recompilled and reinstalled it. Now error is

Booting server 'localhost' on address 127.0.0.1:57110.
Server 'localhost' exited with exit code 0.

cmd is the same :

$ scsynth -u 57110 -V -2
free(): invalid pointer

[sonoro1234]

Would help to know which plugin is failing. Cant find in the code free(): or invalid pointer. (because it is a gcc message)

May be deleting a suspicious one?

Without -V -2 perhaps displays more errors.
Could you post the whole command response? Does it quit after free(): invalid pointer?

If that is not giving more info we should use gdb:

export SC_SYNTHDEF_PATH="path to synthdefs"
gdb --args scsynth -u 57110 -U "path to sc3-plugins"

then run and if exception happens thread apply all bt

[willbasky]

@sonoro1234 thanks for reply!

May be deleting a suspicious one?

You know, I delete all of them to check, and nothing changed. Moreover, deleting sc3 or installing sc without sc3 returns the same error, plus one more:

$ scsynth -u 57110
Exception in World_New: Permission denied
Segmentation error (memory stack is throwed to disk)

Without -V -2 perhaps displays more errors.

I did. No more verbosity.

Does it quit after free(): invalid pointer?

There is one line Segmentation error (memory stack is throwed to disk). Full output were

$ scsynth -u 57110 -V -2
free(): invalid pointer
Segmentation error (memory stack is throwed to disk)

path to synthdefs

Do you mean this one /home/metaxis/.local/share/SuperCollider/synthdefs/? It is empty.

use gdb

returns

$ export SC_SYNTHDEF_PATH="/home/metaxis/.local/share/SuperCollider/synthdefs/"

$ gdb --args scsynth -u 57110 -U "/usr/local/share/SuperCollider/Extensions/SC3plugins/"
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from scsynth...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/local/bin/scsynth -u 57110 -U /usr/local/share/SuperCollider/Extensions/SC3plugins/
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Exception in World_New: Permission denied

Program received signal SIGSEGV, Segmentation fault.
__GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:65
65      ../nptl/pthread_mutex_lock.c: There is no such file or directory.
(gdb) thread apply all bt

Thread 1 (Thread 0x7ffff7fa3380 (LWP 3525)):
#0  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:65
#1  0x00005555555a0d69 in World_Cleanup.part.303 ()
#2  0x00005555555a2b16 in World_New ()
#3  0x0000555555562475 in main ()
(gdb) 

[sonoro1234]

I dont understand. First you say

SC server stop to load today. I launched before. It launch if I deleted sc3-plugins.

Then in last message

You know, I delete all of them to check, and nothing changed. Moreover, deleting sc3 or installing sc without sc3 returns the same error, plus one more:

Also Exception in World_New: Permission denied is a new problem so something has changed may be because you reinstalled sc from a different source,?

Lets start from the begining get a new 3.10.2 sc installation working without sc3-plugins

For solving Exception in World_New: Permission denied
supercollider/supercollider#4226 (comment)
could work

[willbasky]

Also Exception in World_New: Permission denied is a new problem so something has changed may be because you reinstalled sc from a different source,?

Yes, it is additional problem. I recompiled and reinstalled several times. scsynth didn't start anymore (no matter, either there is sc3 or not).

Lets start from the begining get a new 3.10.2 sc installation working without sc3-plugins

I did. The same error.

For solving Exception in World_New: Permission denied
my $USER is part of audio group. And there was no zombie scsynch ever.

My build script for supercollider and for sc3-plugins btw.

Now i have the following errors in different places. No matter is there sc3 or not.

1. SC output:

*** Welcome to SuperCollider 3.10.2. *** For help press Ctrl-D.
Booting server 'localhost' on address 127.0.0.1:57110.
SCDoc: Indexing help-files...
Server 'localhost' exited with exit code 0.
SCDoc: Indexed 1923 documents in 1.13 seconds

2. Console output

$ scsynth -u 57110
double free or corruption (out)
Segmentation error (memory stack is throwed to disk)

3. And gdb output the same (see above)

I don't know now, how to come back and start server without sc3.
I unistalled sc with 'make uninstall' and 'rm -rf' SC folders. Maybe something was rest and impact on new installations.

[sonoro1234]

So, recompile with Debug or RelWithDebInfo, run gdb and post results.

(This is no more a sc3-plugins issue but a supercollider issue now)

[willbasky]

Should I move issue to SC repository?

[sonoro1234]

If you wish so, I dont mind really.
Just recompile with Debug or RelWithDebInfo, run gdb and post results.

In your build script change -DCMAKE_BUILD_TYPE=Release to -DCMAKE_BUILD_TYPE=RelWithDebInfo

[willbasky]

With RelWithDebInfo flag, scsynth starts from konsole

$ scsynth -u 57110 -U "/usr/local/share/SuperCollider/Extensions/SC3plugins/"
JackDriver: client name is 'SuperCollider'
SC_AudioDriver: sample rate = 44100.000000, driver's block size = 1024
SuperCollider 3 server ready.
Zeroconf: registered service 'SuperCollider'

and with gbd

(gdb) run
Starting program: /usr/local/bin/scsynth -u 57110 -U /usr/local/share/SuperCollider/Extensions/SC3plugins/
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff2c24700 (LWP 10186)]
[New Thread 0x7ffff7f5e700 (LWP 10187)]
[New Thread 0x7ffff2327700 (LWP 10188)]
JackDriver: client name is 'SuperCollider'
SC_AudioDriver: sample rate = 44100.000000, driver's block size = 1024
[New Thread 0x7ffff22a6700 (LWP 10189)]
[New Thread 0x7ffff2225700 (LWP 10190)]
[New Thread 0x7ffff1a24700 (LWP 10191)]
SuperCollider 3 server ready.
[New Thread 0x7ffff1223700 (LWP 10192)]
[Thread 0x7ffff1a24700 (LWP 10191) exited]
Zeroconf: registered service 'SuperCollider'

but Supercollider ide can't starts it still, returning error

Booting server 'localhost' on address 127.0.0.1:57110.
Server 'localhost' exited with exit code 0.

[sonoro1234]

Being able to boot with RelWithDebInfo makes me clueless.
Perhaps better post an issue in supercollider repository.
Sorry

[willbasky]

Nevertheless, thank you for your help!