[Lazarus] Project options lock IDE

[FreeMan]

Hello,
fpc svn r31772 lazarus r49851 (Option -dDisableWrapperFunctions) osx 
yosemite qtx64
When I change target cpu, os and witget set then click ok button IDE lock.
I added gdb bt result


RunTool /usr/local/bin/fpc "-iWTOTP" "-Pi386" "-Twin32" 
"-Fr/opt/lazarus/components/codetools/fpc.errore.msg"
[New Thread 0x1c17 of process 99024]
[New Thread 0x1d0b of process 99024]
RunTool /usr/local/bin/fpc "-va" "-Pi386" "-Twin32" 
"-Fr/opt/lazarus/components/codetools/fpc.errore.msg" "compilertest.pas"
Hint: [TFPCTargetConfigCache.Update] has changed
^C
Program received signal SIGINT, Interrupt.
0x0000000100003f7f in fpc_varset_add_sets ()
(gdb) bt
#0  0x0000000100003f7f in fpc_varset_add_sets ()
#1  0x00000001000297a3 in 
SYSUTILS_$$_EXTRACTFILEPATH$RAWBYTESTRING$$RAWBYTESTRING ()
#2  0x00000001085a8540 in ?? ()
#3  0x00000001000173ab in SYSTEM_$$_FREEMEM$POINTER$$QWORD ()
#4  0x00000001085a81c0 in ?? ()
#5  0x000000010000b033 in fpc_ansistr_decr_ref ()
#6  0x0000800000000000 in ?? ()
#7  0x0000000000000000 in ?? ()