crash suddenly program down after many click for edit video

OpenShot 1.4.3

DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=17.2
DISTRIB_CODENAME=rafaela
DISTRIB_DESCRIPTION="Linux Mint 17.2 Rafaela"

apt-get install openshot

ffmpeg version 3.2

these dump some log from gdb

[wav @ 0x7fff8d59d640] max_analyze_duration reached
[wav @ 0x7fff8c699ae0] max_analyze_duration reached
[New Thread 0x7fffa8d8a700 (LWP 31848)]
[New Thread 0x7fffa958b700 (LWP 31849)]
[New Thread 0x7fffabfff700 (LWP 31850)]
[New Thread 0x7fffa9d8c700 (LWP 31851)]
[New Thread 0x7fffab38e700 (LWP 31852)]
[Thread 0x7fff7e7fc700 (LWP 31839) exited]
[Thread 0x7fff7effd700 (LWP 31840) exited]
[Thread 0x7fff7f7fe700 (LWP 31841) exited]
[Thread 0x7fffa37fe700 (LWP 31842) exited]
[Thread 0x7fff7ffff700 (LWP 31843) exited]
on_tlbPlay_clicked called with self.GtkToolButton
on_mnuSaveProjectAs_activate called with self.GtkImageMenuItem
init
[New Thread 0x7fff7ffff700 (LWP 31856)]
[New Thread 0x7fffa37fe700 (LWP 31857)]
[New Thread 0x7fff7f7fe700 (LWP 31858)]
on_cmbProjectType_changed called with self.GtkComboBox
on_cmbProjectType_changed called with self.GtkComboBox
[Thread 0x7fff7ffff700 (LWP 31856) exited]
[Thread 0x7fff7f7fe700 (LWP 31858) exited]
on_frmNewProject_response called with self.GtkDialog
on_btnCreateProject_clicked called with self.GtkButton
[Thread 0x7fffa2ffd700 (LWP 31760) exited]
[Thread 0x7fff9cbf3700 (LWP 31770) exited]
[Thread 0x7fffa1bf6700 (LWP 31759) exited]
[Thread 0x7fff9d3f4700 (LWP 31769) exited]
NEW SDL CONSUMER
[wav @ 0x1678e60] max_analyze_duration reached
[wav @ 0x13f0d60] max_analyze_duration reached
[wav @ 0x1cf8ee0] max_analyze_duration reached
[wav @ 0x2804e00] max_analyze_duration reached
[Thread 0x7fffa8d8a700 (LWP 31848) exited]
[Thread 0x7fffa958b700 (LWP 31849) exited]
[Thread 0x7fffabfff700 (LWP 31850) exited]
[Thread 0x7fffa9d8c700 (LWP 31851) exited]
[Thread 0x7fffab38e700 (LWP 31852) exited]
[New Thread 0x7fffab38e700 (LWP 31859)]
[Thread 0x7fffab38e700 (LWP 31859) exited]
[New Thread 0x7fffab38e700 (LWP 31860)]
[New Thread 0x7fffa9d8c700 (LWP 31861)]
project saved! - p1_4
[wav @ 0x7fff9400ee00] max_analyze_duration reached
[wav @ 0x7fff9400f6a0] max_analyze_duration reached
[New Thread 0x7fffabfff700 (LWP 31862)]
[New Thread 0x7fffa958b700 (LWP 31863)]
[New Thread 0x7fffa2ffd700 (LWP 31864)]
[New Thread 0x7fffa1bf6700 (LWP 31865)]
[New Thread 0x7fffa13f5700 (LWP 31866)]
[New Thread 0x7fff9cbf3700 (LWP 31867)]
[New Thread 0x7fff7ffff700 (LWP 31868)]
on_frmNewProject_destroy called with self.GtkDialog
[New Thread 0x7fff7f7fe700 (LWP 31869)]
[Thread 0x7fff7f7fe700 (LWP 31869) exited]
[wav @ 0x1643dc0] max_analyze_duration reached
[wav @ 0x26a2620] max_analyze_duration reached
[wav @ 0x212dc40] max_analyze_duration reached
[wav @ 0x1a3fa60] max_analyze_duration reached
[wav @ 0x7fff94e39740] max_analyze_duration reached
[wav @ 0x7fff9457bac0] max_analyze_duration reached
[Thread 0x7fffabfff700 (LWP 31862) exited]
[Thread 0x7fffa958b700 (LWP 31863) exited]
[Thread 0x7fffa2ffd700 (LWP 31864) exited]
[Thread 0x7fffa1bf6700 (LWP 31865) exited]
[Thread 0x7fffa13f5700 (LWP 31866) exited]
[New Thread 0x7fffa13f5700 (LWP 31872)]
[New Thread 0x7fffa1bf6700 (LWP 31873)]
[New Thread 0x7fffa2ffd700 (LWP 31874)]
[New Thread 0x7fffa958b700 (LWP 31875)]
[New Thread 0x7fffabfff700 (LWP 31876)]
on_tlbPlay_clicked called with self.GtkToolButton
[Thread 0x7fffa37fe700 (LWP 31857) exited]
on_tlbPlay_clicked called with self.GtkToolButton
[New Thread 0x7fffa3fff700 (LWP 31886)]
[New Thread 0x7fffa37fe700 (LWP 31887)]
[New Thread 0x7fffa8d8a700 (LWP 31888)]
[New Thread 0x7fff7f7fe700 (LWP 31889)]
[New Thread 0x7fff7effd700 (LWP 31890)]
[New Thread 0x7fff7e7fc700 (LWP 31891)]
[Thread 0x7fff7e7fc700 (LWP 31891) exited]
project state modified
state saved
[wav @ 0x179e760] max_analyze_duration reached
[wav @ 0x2805800] max_analyze_duration reached
[Thread 0x7fffa3fff700 (LWP 31886) exited]
[Thread 0x7fffa37fe700 (LWP 31887) exited]
[Thread 0x7fffa8d8a700 (LWP 31888) exited]
[Thread 0x7fff7f7fe700 (LWP 31889) exited]
[Thread 0x7fff7effd700 (LWP 31890) exited]
[wav @ 0x1183140] max_analyze_duration reached
[wav @ 0x268cbc0] max_analyze_duration reached
project state modified
state saved
project state modified
state saved
project state modified
state saved
project state modified
state saved
project state modified
state saved
[wav @ 0x2483aa0] max_analyze_duration reached
[wav @ 0x2485b60] max_analyze_duration reached
[wav @ 0x236ba60] max_analyze_duration reached
[wav @ 0x18f2c80] max_analyze_duration reached
[wav @ 0x1cfb7e0] max_analyze_duration reached
python: malloc.c:4165: malloc_consolidate: Assertion `nextchunk->fd_nextsize->bk_nextsize == nextchunk' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7fffa9d8c700 (LWP 31861)]
0x00007ffff782dc37 in __GI_raise (sig=sig@entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb)