[Lazarus] when start Compile, IDE locking everything

[FreeMan]

Hello,
I'm try some code, get from lnet example. copy folder to different 
folder, and change some path and code.
project work any error, just click compile or shift + f9 IDE lock in 
some work, and its in threaded work, 'cos I can minimize or focus to any 
form.
My idea is searching some paths&files,  its been endless loop. This is 
just idea 'cos no any message or error show up.

Last test for find bug:
open IDE & project (via open last saved project), click directly compile 
button on toolbar in IDE editor, its compiled, click one more, compiled 
too. Open "options" from "project inspector" directly click to Ok then 
click to compile and bingo, IDE locked.
if "cancel" on options no problem. just when save(ok button click) 
project options.
Kubuntu 14.04 x64 svn fpc & lazarus svn 45510
Thank you