CL https://golang.org/cl/20050 mentions this issue.

This is also broken on x86 Fedora (22 and 23) at the moment. The latest git tip (with the report stderr commit) reports:

##### ../misc/cgo/testsanitizers
skipping msan tests: clang version 3.7 (older than 3.8) incompatible with linux version 4.3 (4.1 or newer)
# command-line-arguments
/usr/bin/ld: cannot find /usr/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.tsan-x86_64.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)
FAIL: tsan
# command-line-arguments
/usr/bin/ld: cannot find /usr/bin/../lib/clang/3.7.0/lib/linux/libclang_rt.tsan-x86_64.a: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)
FAIL: tsan2
2016/02/29 10:55:40 Failed: exit status 1

As far as I can tell, Fedora doesn't build or package libclang_rt.tsan-x86_64.a. It does package gcc versions (as libtsan/libtsan-static), which I didn't have installed until I went looking for them; installing them made no difference in the error here.

For what it's worth, commit eaf5235 (fixing #14570) fixes my issue on Fedora 22/23, as its check for clang < 3.8 on kernel >= 4.1 now skips tsan tests too.

(Also, that commit's 'does -fsanitize=thread work' check would presumably also protect Fedora 22/23 against this issue.)

This is working now.