In the Quartus® II software version 14.1 for Linux, you may see the fatal error shown below and this error message when you are running on Ubuntu 14.04 or other unsupported Linux distributions.
*** Fatal Error: Segment Violation at 0x7f17cf07fe80
Module: quartus
Stack Trace:
0x214ed: addbyter 0xd (curl.so.4)
0x21829: dprintf_formatf 0x159 (curl.so.4)
0x22a45: curl_mvsnprintf 0x25 (curl.so.4)
0x125be: Curl_failf 0x9e (curl.so.4)
0x910f: Curl_resolv_timeout 0x12f (curl.so.4)
0x415d: clock_gettime 0x1d (rt.so.1)
End-trace
The error occurs because the Curl libary is not thread-safe.