last mesa xorg log

just to report.
different error. with last mesa dev
OpenGL core profile version string: 3.3 (Core Profile) Mesa 17.2.0-devel
(git-f78aa2c986)

[  5057.542] (II) glamor: OpenGL accelerated X.org driver based.
[  5057.583] (EE)
[  5057.583] (EE) Backtrace:
[  5057.584] (EE) 0: /usr/libexec/Xorg (OsLookupColor+0x23c) [0x1021908c]
[  5057.585] (EE) 1: linux-vdso64.so.1 (?+0x23c) [0x3fff88570710]
[  5057.585] (EE) unw_get_proc_info failed: no unwind info found [-10]
[  5057.585] (EE)
[  5057.585] (EE) Segmentation fault at address 0x2b56ebec
[  5057.585] (EE)
Fatal server error:
[  5057.585] (EE) Caught signal 11 (Segmentation fault). Server aborting