Backtrace from GDB, just in case that helps.
(gdb) backtrace
#0 0x00007ffff5f05445 in __GI_raise (sig=<optimized out>)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007ffff5f08bab in __GI_abort () at abort.c:91
#2 0x00007ffff5efe10e in __assert_fail_base (fmt=<optimized out>,
assertion=0x7ffff5a7b293 "right",
file=0x7ffff5a7b220 "/build/buildd/projectm-2.0.1+dfsg/src/libprojectM/MilkdropPresetFactory/Expr.cpp", line=<optimized out>, function=<optimized out>)
at assert.c:94
#3 0x00007ffff5efe1b2 in __GI___assert_fail (
assertion=0x7ffff5a7b293 "right",
file=0x7ffff5a7b220 "/build/buildd/projectm-2.0.1+dfsg/src/libprojectM/MilkdropPresetFactory/Expr.cpp", line=161,
function=0x7ffff5a7b3a0 "float TreeExpr::eval_tree_expr(int, int)")
at assert.c:103
#4 0x00007ffff5a5c962 in TreeExpr::eval_tree_expr(int, int) ()
from /usr/lib/libprojectM.so.2
#5 0x00007ffff5a5c804 in TreeExpr::eval_tree_expr(int, int) ()
from /usr/lib/libprojectM.so.2
#6 0x00007ffff5a475f2 in PerPixelEqn::evaluate(int, int) ()
from /usr/lib/libprojectM.so.2
#7 0x00007ffff5a3f18e in MilkdropPreset::evalPerPixelEqns() ()
from /usr/lib/libprojectM.so.2
#8 0x00007ffff5a3f6e8 in MilkdropPreset::evaluateFrame() ()
---Type <return> to continue, or q <return> to quit---
from /usr/lib/libprojectM.so.2
#9 0x00007ffff5a3f930 in MilkdropPreset::Render(BeatDetect const&, PipelineContext const&) () from /usr/lib/libprojectM.so.2
#10 0x00007ffff5a096e0 in projectM::renderFrame() ()
from /usr/lib/libprojectM.so.2
#11 0x00007ffff55163f0 in QGLWidget::glDraw() ()
from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4
#12 0x00007ffff6931281 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#13 0x00007ffff6936179 in QObject::event(QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#14 0x00007ffff6e3f894 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007ffff6e44713 in QApplication::notify(QObject*, QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007ffff691ce9c in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#17 0x00007ffff694e1f2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#18 0x00007ffff694bc0d in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007ffff4448d53 in g_main_context_dispatch ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007ffff44490a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffff4449164 in g_main_context_iteration ()
---Type <return> to continue, or q <return> to quit---
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007ffff694c3bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#23 0x00007ffff6ee7d5e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007ffff691bc82 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#25 0x00007ffff691bed7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#26 0x00007ffff6920f67 in QCoreApplication::exec() ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#27 0x000000000040acff in main ()
Backtrace from GDB, just in case that helps. sysdeps/ unix/sysv/ linux/raise. c:64 0x7ffff5a7b293 "right", 0x7ffff5a7b220 "/build/ buildd/ projectm- 2.0.1+dfsg/ src/libprojectM /MilkdropPreset Factory/ Expr.cpp" , line=<optimized out>, function=<optimized out>) 0x7ffff5a7b293 "right", 0x7ffff5a7b220 "/build/ buildd/ projectm- 2.0.1+dfsg/ src/libprojectM /MilkdropPreset Factory/ Expr.cpp" , line=161, 0x7ffff5a7b3a0 "float TreeExpr: :eval_tree_ expr(int, int)") :eval_tree_ expr(int, int) () libprojectM. so.2 :eval_tree_ expr(int, int) () libprojectM. so.2 :evaluate( int, int) () libprojectM. so.2 :evalPerPixelEq ns() () libprojectM. so.2 :evaluateFrame( ) () libprojectM. so.2 :Render( BeatDetect const&, PipelineContext const&) () from /usr/lib/ libprojectM. so.2 :renderFrame( ) () libprojectM. so.2 x86_64- linux-gnu/ libQtOpenGL. so.4 :activate( QObject* , QMetaObject const*, int, void**) () from /usr/lib/ x86_64- linux-gnu/ libQtCore. so.4 :event( QEvent* ) () x86_64- linux-gnu/ libQtCore. so.4 vate::notify_ helper( QObject* , QEvent*) x86_64- linux-gnu/ libQtGui. so.4 :notify( QObject* , QEvent*) () x86_64- linux-gnu/ libQtGui. so.4 n::notifyIntern al(QObject* , QEvent*) x86_64- linux-gnu/ libQtCore. so.4 x86_64- linux-gnu/ libQtCore. so.4 x86_64- linux-gnu/ libQtCore. so.4 context_ dispatch () 64-linux- gnu/libglib- 2.0.so. 0 64-linux- gnu/libglib- 2.0.so. 0 context_ iteration () 64-linux- gnu/libglib- 2.0.so. 0 rGlib:: processEvents( QFlags< QEventLoop: :ProcessEventsF lag>) () from /usr/lib/ x86_64- linux-gnu/ libQtCore. so.4 x86_64- linux-gnu/ libQtGui. so.4 :processEvents( QFlags< QEventLoop: :ProcessEventsF lag>) () from /usr/lib/ x86_64- linux-gnu/ libQtCore. so.4 :exec(QFlags< QEventLoop: :ProcessEventsF lag>) () from /usr/lib/ x86_64- linux-gnu/ libQtCore. so.4 n::exec( ) () x86_64- linux-gnu/ libQtCore. so.4
(gdb) backtrace
#0 0x00007ffff5f05445 in __GI_raise (sig=<optimized out>)
at ../nptl/
#1 0x00007ffff5f08bab in __GI_abort () at abort.c:91
#2 0x00007ffff5efe10e in __assert_fail_base (fmt=<optimized out>,
assertion=
file=
at assert.c:94
#3 0x00007ffff5efe1b2 in __GI___assert_fail (
assertion=
file=
function=
at assert.c:103
#4 0x00007ffff5a5c962 in TreeExpr:
from /usr/lib/
#5 0x00007ffff5a5c804 in TreeExpr:
from /usr/lib/
#6 0x00007ffff5a475f2 in PerPixelEqn:
from /usr/lib/
#7 0x00007ffff5a3f18e in MilkdropPreset:
from /usr/lib/
#8 0x00007ffff5a3f6e8 in MilkdropPreset:
---Type <return> to continue, or q <return> to quit---
from /usr/lib/
#9 0x00007ffff5a3f930 in MilkdropPreset:
#10 0x00007ffff5a096e0 in projectM:
from /usr/lib/
#11 0x00007ffff55163f0 in QGLWidget::glDraw() ()
from /usr/lib/
#12 0x00007ffff6931281 in QMetaObject:
#13 0x00007ffff6936179 in QObject:
from /usr/lib/
#14 0x00007ffff6e3f894 in QApplicationPri
() from /usr/lib/
#15 0x00007ffff6e44713 in QApplication:
from /usr/lib/
#16 0x00007ffff691ce9c in QCoreApplicatio
() from /usr/lib/
#17 0x00007ffff694e1f2 in ?? () from /usr/lib/
#18 0x00007ffff694bc0d in ?? () from /usr/lib/
#19 0x00007ffff4448d53 in g_main_
from /lib/x86_
#20 0x00007ffff44490a0 in ?? () from /lib/x86_
#21 0x00007ffff4449164 in g_main_
---Type <return> to continue, or q <return> to quit---
from /lib/x86_
#22 0x00007ffff694c3bf in QEventDispatche
#23 0x00007ffff6ee7d5e in ?? () from /usr/lib/
#24 0x00007ffff691bc82 in QEventLoop:
#25 0x00007ffff691bed7 in QEventLoop:
#26 0x00007ffff6920f67 in QCoreApplicatio
from /usr/lib/
#27 0x000000000040acff in main ()