Example log: https://logs.chromium.org/v/?s=chromium%2Fbb%2Fchromium.clang%2FToTLinuxThinLTO%2F439%2F%2B%2Frecipes%2Fsteps%2Fcompile%2F0%2Fstdout

Excerpt:
[47317/47402] LINK ./chrome
FAILED: chrome 
python "../../build/toolchain/gcc_link_wrapper.py" --output="./chrome" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -pie -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--no-as-needed -lpthread -Wl,--as-needed -fuse-ld=lld -Wl,--icf=all -flto=thin -Wl,--thinlto-jobs=8 -Wl,--thinlto-cache-dir=thinlto-cache -Wl,--thinlto-cache-policy,cache_size=10\% -Wl,--lto-O0 -fwhole-program-vtables -Wl,-mllvm,-function-sections -Wl,-mllvm,-data-sections -m64 -Werror -Wl,-O1 -Wl,--gc-sections -Wl,--gdb-index -nostdlib++ --sysroot=../../build/linux/debian_jessie_amd64-sysroot -L../../build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -L../../build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=../../build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=. -Wl,--disable-new-dtags -Wl,--export-dynamic -o "./chrome" -Wl,--start-group @"./chrome.rsp"  -Wl,--end-group   -ldl -lpthread -lrt -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lglib-2.0 -lX11 -lX11-xcb -lxcb -lXcomposite -lXcursor -lXdamage -lXext -lXfixes -lXi -lXrender -lXtst -lgmodule-2.0 -lgthread-2.0 -lnss3 -lnssutil3 -lsmime3 -lplds4 -lplc4 -lnspr4 -lcups -lfontconfig -ldbus-1 -lexpat -lXss -lXrandr -lgconf-2 -lresolv -lgio-2.0 -lasound -lm -lz -lpci -latk-1.0 -lgtk-3 -lgdk-3 -lgdk_pixbuf-2.0 -lcairo-gobject 
Warning: request a ThreadPool with 8 threads, but LLVM_ENABLE_THREADS has been turned off
LLVM ERROR: IO failure on output stream.
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)