id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 13475,"boost_1_66_0, Windows 10, mingw-w4, bootstrap fails - cannot write AppData\Local\Temp file",mhkelley2017@…,Vladimir Prus,"Have successfully built a couple versions of boost (most recently 1_65_1), but was unable to build 1_66_0 using mingw-w64. ""bootstrap gcc"" returns multiple fatal errors of the form: cc1.exe: fatal error: can't open 'C:\Users\Owner\AppData\Local\Temp\ccA01VU9.s' for writing: Permission denied compilation terminated. Noted file is actually created somewhere during this, so unclear where/why the failure happens. I attempted to re-build 1_65_1 (using a couple versions of mingw), with identical results. Any suggestions where to look?",Bugs,new,To Be Determined,build,Boost 1.63.0,Showstopper,,,