darktable(91254,0x7fff70a83cc0) malloc: *** error for object 0x7fff70c3a500: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

Program received signal SIGABRT, Aborted.
0x00007fff85e1b0b6 in __kill ()
(gdb) bt
#0  0x00007fff85e1b0b6 in __kill ()
#1  0x00007fff85ebb9f6 in abort ()
#2  0x00007fff85dd3195 in free ()
#3  0x000000010151dca0 in std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::overflow ()
(gdb)