[APP BUG] Tauon segfaults if libprojectM is initialized on a specific cover image

[C0rn3j]

Please confirm the following points:

• This report is NOT about the Android apps in the Play Store
• I have searched the project page to check if the issue was already reported

Affected Application

Third-Party Integration (Kodi, VLC, etc. - please specify below)

Affected Version

current master commit

Operating System

Linux (Desktop)

Additional Application Details

On Arch Linux, with Tauon 9.0.0, Tauon segfaults if initialized on specific covers - it seems to hate My Iron Lung cover by Radiohead for example.

Initializing on another cover and then trying the Radiohead one works.

Side note - I could not get debug traces from gdb on a build specifically created as CMAKE_BUILD_TYPE=Debug, but that may be a skill issue on my part?

Type of Defect

Crash (unexpected closing, OS crash dialog)

Log Output

2026-02-28 21:50:02 [ INFO  ] [  t_main  ] Successfully loaded: libprojectM-4.so.4
2026-02-28 21:50:02 [ DEBUG ] [  t_main  ] Function signatures set up successfully (t_main.py:36363)
2026-02-28 21:50:02 [ INFO  ] [  t_main  ] init project m...

Thread 1 "tauonmb" received signal SIGSEGV, Segmentation fault.

(gdb) bt
#0  __memcpy_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:461
#1  0x00007fffe39a6f14 in memcpy () at /usr/include/bits/string_fortified.h:29
#2  util_copy_rect () at ../mesa-26.0.1/src/util/format/u_format.c:94
#3  0x00007fffe3c0b2f5 in util_copy_box () at ../mesa-26.0.1/src/gallium/auxiliary/util/u_surface.c:80
#4  0x00007fffe440c919 in u_default_texture_subdata () at ../mesa-26.0.1/src/gallium/auxiliary/util/u_transfer.c:103
#5  0x00007fffe354d5c6 in st_TexSubImage () at ../mesa-26.0.1/src/mesa/state_tracker/st_cb_texture.c:2201
#6  0x00007fffe354ed29 in st_TexImage () at ../mesa-26.0.1/src/mesa/state_tracker/st_cb_texture.c:2432
#7  0x00007fffe352328e in teximage () at ../mesa-26.0.1/src/mesa/main/teximage.c:3298
#8  teximage_err () at ../mesa-26.0.1/src/mesa/main/teximage.c:3330
#9  0x00007fffe35255f1 in _mesa_TexImage2D () at ../mesa-26.0.1/src/mesa/main/teximage.c:3401
#10 0x00007fff8d4f214b in libprojectM::Renderer::Texture::Texture(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void const*, unsigned int, int, int, int, int, unsigned int, unsigned int, bool) () at /usr/lib/libprojectM-4.so.4
#11 0x00007fff8d4f7714 in libprojectM::Renderer::TextureManager::Preload() () at /usr/lib/libprojectM-4.so.4
#12 0x00007fff8d4fbe50 in libprojectM::Renderer::TextureManager::TextureManager(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) () at /usr/lib/libprojectM-4.so.4
#13 0x00007fff8d5642d5 in libprojectM::ProjectM::Initialize() () at /usr/lib/libprojectM-4.so.4
#14 0x00007fff8d564e04 in libprojectM::ProjectM::ProjectM() () at /usr/lib/libprojectM-4.so.4
#15 0x00007fff8d566880 in projectm_create_with_opengl_load_proc () at /usr/lib/libprojectM-4.so.4
#16 0x00007ffff6d50ac6 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#17 0x00007ffff6d4d76b in ffi_call_int (cif=cif@entry=0x7fffffffcb30, fn=fn@entry=0x7fff8d566900 <projectm_create>, rvalue=<optimized out>, rvalue@entry=0x7fffffffcab0, avalue=avalue@entry=0x7fffffffcaa0, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#18 0x00007ffff6d5006e in ffi_call (cif=cif@entry=0x7fffffffcb30, fn=fn@entry=0x7fff8d566900 <projectm_create>, rvalue=rvalue@entry=0x7fffffffcab0, avalue=0x7fffffffcaa0) at ../src/x86/ffi64.c:713
#19 0x00007ffff6da5c10 in _call_function_pointer (st=0x7ffff70837b0, flags=257, pProc=0x7fff8d566900 <projectm_create>, avalues=<optimized out>, atypes=0x7fffffffca90, restype=<optimized out>, resmem=0x7fffffffcab0, argcount=0, argtypecount=<optimized out>)
    at ./Modules/_ctypes/callproc.c:953
#20 _ctypes_callproc
    (st=st@entry=0x7ffff70837b0, pProc=pProc@entry=0x7fff8d566900 <projectm_create>, argtuple=argtuple@entry=0x7ffff7d5d3d0 <_PyRuntime+90640>, flags=<optimized out>, argtypes=argtypes@entry=0x0, restype=restype@entry=0x5555557dc8a0, checker=<optimized out>)
    at ./Modules/_ctypes/callproc.c:1319
#21 0x00007ffff6d978d1 in PyCFuncPtr_call (op=<optimized out>, inargs=<optimized out>, kwds=<optimized out>) at ./Modules/_ctypes/_ctypes.c:4686
#22 0x00007ffff796cd4c in _PyObject_MakeTpCall (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, callable=0x7fff842885f0, args=0x7fffffffcef8, nargs=<optimized out>, keywords=<optimized out>) at Objects/call.c:242
#23 0x00007ffff798e048 in _PyEval_EvalFrameDefault (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, frame=0x7ffff7f904f0, throwflag=1024) at Python/generated_cases.c.h:1622
#24 0x00007ffff797eae5 in _PyEval_EvalFrame (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, frame=0x7ffff7f8f1d0, throwflag=0) at ./Include/internal/pycore_ceval.h:120
#25 _PyEval_Vector (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, func=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) at Python/ceval.c:2083
#26 0x00007ffff7a6b66e in PyEval_EvalCode (co=0x55555568d5f0, globals=<optimized out>, locals=0x7ffff7135700) at Python/ceval.c:975
#27 0x00007ffff7a8bf3a in builtin_exec_impl (module=<optimized out>, source=0x55555568d5f0, globals=0x7ffff7135700, locals=0x7ffff7135700, closure=<optimized out>) at Python/bltinmodule.c:1180
#28 builtin_exec (module=<optimized out>, args=<optimized out>, nargs=<optimized out>, kwnames=<optimized out>) at Python/clinic/bltinmodule.c.h:571
#29 0x00007ffff796fa5d in _PyObject_VectorcallTstate (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, callable=0x7ffff75b3ce0, args=0x7fffffffd448, nargsf=9223372036854775810, kwnames=0x0) at ./Include/internal/pycore_call.h:169
#30 PyObject_Vectorcall (callable=0x7ffff75b3ce0, args=0x7fffffffd448, nargsf=9223372036854775810, kwnames=0x0) at Objects/call.c:327
#31 0x00007ffff79844c5 in _PyEval_EvalFrameDefault (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, frame=0x7ffff7f8f0e0, throwflag=1024) at Python/generated_cases.c.h:1622
#32 0x00007ffff79b110c in _PyEval_EvalFrame (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, frame=0x7ffff7f8f020, throwflag=0) at ./Include/internal/pycore_ceval.h:120
#33 _PyEval_Vector (tstate=0x7ffff7d942c0 <_PyRuntime+315648>, func=<optimized out>, locals=0x0, args=<optimized out>, argcount=2, kwnames=<optimized out>) at Python/ceval.c:2083
#34 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:413
#35 0x00007ffff7aaaabe in pymain_run_module (modname=<optimized out>, set_argv0=1) at Modules/main.c:353
#36 0x00007ffff7a5e76a in pymain_run_python (exitcode=0x7fffffffd69c) at Modules/main.c:688
#37 Py_RunMain () at Modules/main.c:775
#38 0x00007ffff7a57c6b in Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:829
#39 0x00007ffff76366c1 in __libc_start_call_main (main=main@entry=0x555555555120 <main>, argc=argc@entry=3, argv=argv@entry=0x7fffffffd918) at ../sysdeps/nptl/libc_start_call_main.h:59
#40 0x00007ffff76367f9 in __libc_start_main_impl (main=0x555555555120 <main>, argc=3, argv=0x7fffffffd918, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffd908) at ../csu/libc-start.c:360
#41 0x0000555555555045 in _start ()

Describe the Issue

Crash on trying to init libprojectm

Specifically using commit 3649044 but I did not verify which exact one causes it, it could be an earlier one.

I just know that 014fb59 works fine.

[kblaschke]

This is using code we've recently merged to master, and is still a WIP, see PR #970

I recommend using commit 184aefa if you want to stay on master, or if you need the texture callback, wait for the linked PR to be merged.