QtConCurrent::map always crash for simple multi-thread program

.hpp
http://pastebin.com/BLrHwq4P

.cpp
http://pastebin.com/a2ByqCLG

main.cpp
http://pastebin.com/yW6p6ZnS

error messages(details)
http://pastebin.com/bmaWmByn

error messages of console

qmlTest2(6752,0x10e10a000) malloc: *** error for object 0x7f885a444820: pointer being freed was not allocated

• • • set a breakpoint in malloc_error_break to debug
      The program has unexpectedly finished.

The program always crash if I call QtConcurrent::Map, but QtConcurrent::run work fine
What kind of faults do I make?Can't find any error