Segmentation fault with R820T

[vlalov]

I'm having gqrx core dump just after starting listening (a second after that) with the following output:
linux; GNU C++ version 4.8.1 20130909 [gcc-4_8-branch revision 202388]; Boost_105300; UHD_003.007.000-0-unknown

gr-osmosdr v0.1.x-xxx-xunknown (0.1.4git) gnuradio 3.7.3
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf rfspace
Using Volk machine: sse4_2_64_orc
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
gr-osmosdr v0.1.x-xxx-xunknown (0.1.4git) gnuradio 3.7.3
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf rfspace
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
Exact sample rate is: 1500000.014901 Hz
rtlsdr_read_async returned with -5
Segmentation fault

gqrx is built from the current master branch.

Stack trace:

0 0x00007f2fe476d064 in free () from /lib64/libc.so.6

1 0x00007f2fde641df0 in ?? () from /usr/lib64/libusb-1.0.so.0

2 0x00007f2fde63ec6f in ?? () from /usr/lib64/libusb-1.0.so.0

3 0x00007f2fde63f5c7 in libusb_handle_events_timeout_completed () from /usr/lib64/libusb-1.0.so.0

4 0x00007f2fe2b162c0 in rtlsdr_read_async () from /usr/lib64/librtlsdr.so.0

5 0x00007f2fe7339a1a in rtl_source_c::rtlsdr_wait() () from /usr/lib64/libgnuradio-osmosdr-0.1.4git.so.0.0.0

6 0x00007f2fe3569a6a in ?? () from /usr/lib64/libboost_thread.so.1.53.0

7 0x00007f2fe52c80db in start_thread () from /lib64/libpthread.so.0

8 0x00007f2fe47d758d in clone () from /lib64/libc.so.6

[vlalov]

Problem solved it was a problem in libusb. Upgrading it to 1.0.19 solved the issue.
This is actually a duplicate of #162.