Segfault when exporting with clip time set to 16X

[noizebox]

Describe the bug:
Segfault when exporting with speed set to 16x

Steps to reproduce the behavior:
Load a video clip
Add it to a track
Set Time->Forward->Fast 16x on the clip
Export with default settings
Segfault (double free or corruption)

Expected behavior:
Render video at 16 speed

System Details:
OpenShot-v2.6.1-dev-daily-9351-04db6ce8-46255e46-x86_64.AppImage
Mint 20

Log Files:
Attached

Exception / Stacktrace:
0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff7727859 in __GI_abort () at abort.c:79
#2 0x00007ffff77923ee in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff78bc285 "%s\n")
at ../sysdeps/posix/libc_fatal.c:155
#3 0x00007ffff779a47c in malloc_printerr (str=str@entry=0x7ffff78be690 "double free or corruption (!prev)") at malloc.c:5347
#4 0x00007ffff779c12c in _int_free (av=0x7ffff78edb80 <main_arena>, p=0x555566c589d0, have_lock=) at malloc.c:4317
#5 0x00007fffcce8df49 in openshot::Clip::get_time_mapped_frame(std::shared_ptropenshot::Frame, long) ()
at /tmp/.mount_9XZxKI/usr/bin/libopenshot.so.21
#6 0x00007fffcce9ab41 in openshot::Clip::GetFrame(std::shared_ptropenshot::Frame, long, openshot::TimelineInfoStruct*) ()
at /tmp/.mount_9XZxKI/usr/bin/libopenshot.so.21
#7 0x00007fffccefabfa in openshot::Timeline::GetOrCreateFrame(std::shared_ptropenshot::Frame, openshot::Clip*, long, openshot::TimelineInfoStruct*) () at /tmp/.mount_9XZxKI/usr/bin/libopenshot.so.21
#8 0x00007fffccefb167 in openshot::Timeline::add_layer(std::shared_ptropenshot::Frame, openshot::Clip*, long, bool, float) ()
at /tmp/.mount_9XZxKI/usr/bin/libopenshot.so.21
#9 0x00007fffcceff234 in openshot::Timeline::GetFrame(long) () at /tmp/.mount_9XZxKI/usr/bin/libopenshot.so.21
#10 0x00007fffcd3157ff in _wrap_Timeline_GetFrame () at /tmp/.mount_9XZxKI/usr/bin/lib/_openshot.so
#11 0x00007ffff7b31761 in PyCFunction_Call () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#12 0x00007ffff7aa2b20 in _PyEval_EvalFrameDefault () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#13 0x00007ffff7a99a0f in () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#14 0x00007ffff7a9a0fc in () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#15 0x00007ffff7aa0303 in _PyEval_EvalFrameDefault () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#16 0x00007ffff7a99a0f in () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#17 0x00007ffff7a99d34 in _PyFunction_FastCallDict () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#18 0x00007ffff7b84fd1 in _PyObject_FastCallDict () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#19 0x00007ffff7b856fd in _PyObject_Call_Prepend () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#20 0x00007ffff7b85768 in PyObject_Call () at /tmp/.mount_9XZxKI/usr/bin/libpython3.6m.so.1.0
#21 0x00007ffff6728c30 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#22 0x00007ffff6729108 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#23 0x00007ffff6729390 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#24 0x00007ffff6729d07 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#25 0x00007ffff60a75e9 in QMetaObject::activate(QObject*, int, int, void**) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Core.so.5
#26 0x00007ffff22f0660 in () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#27 0x00007ffff60a7525 in QMetaObject::activate(QObject*, int, int, void**) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Core.so.5
#28 0x00007ffff224fb12 in QAbstractButton::clicked(bool) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#29 0x00007ffff224fd2a in () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#30 0x00007ffff225110a in () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#31 0x00007ffff22512fd in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#32 0x00007ffff2baa9a3 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtWidgets.cpython-36m-x86_64-linux-gnu.so
#33 0x00007ffff219d038 in QWidget::event(QEvent*) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#34 0x00007ffff2babf93 in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtWidgets.cpython-36m-x86_64-linux-gnu.so
#35 0x00007ffff215e83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#36 0x00007ffff216665f in QApplication::notify(QObject*, QEvent*) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Widgets.so.5
#37 0x00007ffff2bfc97e in () at /tmp/.mount_9XZxKI/usr/bin/lib/PyQt5/QtWidgets.cpython-36m-x86_64-linux-gnu.so
#38 0x00007ffff60788a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /tmp/.mount_9XZxKI/usr/bin/libQt5Core.so.5
#39 0x00007ffff2165632 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&----
openshot-qt.log.zip

[stale]

Thank you so much for submitting an issue to help improve OpenShot Video Editor. We are sorry about this, but this particular issue has gone unnoticed for quite some time. To help keep the OpenShot GitHub Issue Tracker organized and focused, we must ensure that every issue is correctly labelled and triaged, to get the proper attention.

This issue will be closed, as it meets the following criteria:

• No activity in the past 180 days
• No one is assigned to this issue

We'd like to ask you to help us out and determine whether this issue should be reopened.

• If this issue is reporting a bug, please can you attempt to reproduce on the latest daily build to help us to understand whether the bug still needs our attention.
• If this issue is proposing a new feature, please can you verify whether the feature proposal is still relevant.

Thanks again for your help!