I ran gdb on pan after getting a error reading: 
(Null) - Invalid header: 
Segmentation fault 
 
When I ran pan under gdb I got this error: 
(Null) - Invalid header: 
 
Program received signal SIGSEGV, Segmentation fault. 
[Switching to Thread 6151 (LWP 19411)] 
0x4056513e in memcpy () at memcpy:-1 
-1      memcpy: No such file or directory. 
        in memcpy 
(gdb) continue 
Continuing. 
 
Program exited normally. 
 
This happened in version 0.14.2 as well.