I'm not sure how old this one is but the ARM FYI bot looks like its been failing for a while now.

From:
https://build.chromium.org/p/chromium.fyi/builders/Linux%20ARM/builds/7626/steps/compile/logs/stdio

Failure:
FAILED: /mnt/data/b/build/slave/Linux_ARM/build/src/build/goma/client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang -MMD -MF obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o.d -DOPJ_STATIC -DPNG_PREFIX -DPNG_USE_READ_MACROS -D_CRT_SECURE_NO_WARNINGS -DV8_DEPRECATION_WARNINGS -DCLD_VERSION=2 -D_FILE_OFFSET_BITS=64 -DCHROMIUM_BUILD -DCR_CLANG_REVISION=263324-1 -DUI_COMPOSITOR_IMAGE_TRANSPORT -DUSE_AURA=1 -DUSE_PANGO=1 -DUSE_CAIRO=1 -DUSE_DEFAULT_RENDER_THEME=1 -DUSE_LIBJPEG_TURBO=1 -DUSE_X11=1 -DUSE_CLIPBOARD_AURAX11=1 -DENABLE_WEBRTC=1 -DENABLE_MEDIA_ROUTER=1 -DENABLE_PEPPER_CDMS -DENABLE_CONFIGURATION_POLICY -DENABLE_NOTIFICATIONS -DENABLE_TOPCHROME_MD=1 -DUSE_UDEV -DFIELDTRIAL_TESTING_ENABLED -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_AUTOFILL_DIALOG=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_APP_LIST=1 -DENABLE_SETTINGS_APP=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_MDNS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DUSE_LIBPCI=1 -DUSE_OPENSSL=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_NSS_VERIFIER=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -I../.. -I../../third_party/pdfium -Igen -fstack-protector --param=ssp-buffer-size=4 -Werror -pthread -fno-strict-aliasing -Wall -Wno-unused-parameter -Wno-missing-field-initializers -fvisibility=hidden -pipe -fPIC -Xclang -load -Xclang /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-templates -Xclang -plugin-arg-find-bad-constructs -Xclang follow-macro-expansion -fcolor-diagnostics -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-unused-variable -target arm-linux-gnueabihf -march=armv7-a -mtune=generic-armv7-a -mfpu=neon -mfloat-abi=hard -mthumb --sysroot=/mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot -O2 -fno-ident -fdata-sections -ffunction-sections -funwind-tables   -c ../../third_party/pdfium/third_party/libtiff/tif_predict.c -o obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o
Unhandled instruction type!
UNREACHABLE executed at /usr/local/google/home/thakis/src/chrome/src/third_party/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:3341!
0  clang           0x000000000188b0e8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1  clang           0x0000000001889596 llvm::sys::RunSignalHandlers() + 54
2  clang           0x000000000188b7fe
3  libpthread.so.0 0x00007f2b8a13e340
4  libc.so.6       0x00007f2b89367cc9 gsignal + 57
5  libc.so.6       0x00007f2b8936b0d8 abort + 328
6  clang           0x0000000001843af7
7  clang           0x000000000196b645
8  clang           0x000000000195f248
9  clang           0x0000000001955aba
10 clang           0x00000000019510c5
11 clang           0x00000000014a9965 llvm::FPPassManager::runOnFunction(llvm::Function&) + 549
12 clang           0x00000000014a9bab llvm::FPPassManager::runOnModule(llvm::Module&) + 43
13 clang           0x00000000014aa075 llvm::legacy::PassManagerImpl::run(llvm::Module&) + 869
14 clang           0x00000000019d43a3 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction, llvm::raw_pwrite_stream*) + 9363
15 clang           0x00000000020728fb
16 clang           0x0000000001dbff5c clang::MultiplexConsumer::HandleTranslationUnit(clang::ASTContext&) + 44
17 clang           0x000000000241f396 clang::ParseAST(clang::Sema&, bool, bool) + 598
18 clang           0x0000000001d86aa5 clang::FrontendAction::Execute() + 69
19 clang           0x0000000001d51281 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 1153
20 clang           0x0000000001e1b29d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 3245
21 clang           0x000000000073fcf2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) + 1170
22 clang           0x000000000073e7f6 main + 12390
23 libc.so.6       0x00007f2b89352ec5 __libc_start_main + 245
24 clang           0x000000000073b685
Stack dump:
0.	Program arguments: /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/bin/clang -cc1 -triple thumbv7--linux-gnueabihf -emit-obj -disable-free -main-file-name tif_predict.c -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu cortex-a8 -target-feature -fp-only-sp -target-feature -d16 -target-feature +vfp3 -target-feature -fp16 -target-feature -vfp4 -target-feature -fp-armv8 -target-feature +neon -target-feature -crypto -target-abi aapcs-linux -mfloat-abi hard -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -coverage-file /mnt/data/b/build/slave/Linux_ARM/build/src/out/Release/obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o -resource-dir /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/bin/../lib/clang/3.9.0 -dependency-file obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o.d -MT obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o -D OPJ_STATIC -D PNG_PREFIX -D PNG_USE_READ_MACROS -D _CRT_SECURE_NO_WARNINGS -D V8_DEPRECATION_WARNINGS -D CLD_VERSION=2 -D _FILE_OFFSET_BITS=64 -D CHROMIUM_BUILD -D CR_CLANG_REVISION=263324-1 -D UI_COMPOSITOR_IMAGE_TRANSPORT -D USE_AURA=1 -D USE_PANGO=1 -D USE_CAIRO=1 -D USE_DEFAULT_RENDER_THEME=1 -D USE_LIBJPEG_TURBO=1 -D USE_X11=1 -D USE_CLIPBOARD_AURAX11=1 -D ENABLE_WEBRTC=1 -D ENABLE_MEDIA_ROUTER=1 -D ENABLE_PEPPER_CDMS -D ENABLE_CONFIGURATION_POLICY -D ENABLE_NOTIFICATIONS -D ENABLE_TOPCHROME_MD=1 -D USE_UDEV -D FIELDTRIAL_TESTING_ENABLED -D ENABLE_TASK_MANAGER=1 -D ENABLE_EXTENSIONS=1 -D ENABLE_PDF=1 -D ENABLE_PLUGINS=1 -D ENABLE_SESSION_SERVICE=1 -D ENABLE_THEMES=1 -D ENABLE_AUTOFILL_DIALOG=1 -D ENABLE_PRINTING=1 -D ENABLE_BASIC_PRINTING=1 -D ENABLE_PRINT_PREVIEW=1 -D ENABLE_SPELLCHECK=1 -D ENABLE_CAPTIVE_PORTAL_DETECTION=1 -D ENABLE_APP_LIST=1 -D ENABLE_SETTINGS_APP=1 -D ENABLE_SUPERVISED_USERS=1 -D ENABLE_MDNS=1 -D ENABLE_SERVICE_DISCOVERY=1 -D V8_USE_EXTERNAL_STARTUP_DATA -D FULL_SAFE_BROWSING -D SAFE_BROWSING_CSD -D SAFE_BROWSING_DB_LOCAL -D USE_LIBPCI=1 -D USE_OPENSSL=1 -D USE_GLIB=1 -D USE_NSS_CERTS=1 -D USE_NSS_VERIFIER=1 -D NDEBUG -D NVALGRIND -D DYNAMIC_ANNOTATIONS_ENABLED=0 -I ../.. -I ../../third_party/pdfium -I gen -isysroot /mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot -internal-isystem /mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot/usr/local/include -internal-isystem /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/bin/../lib/clang/3.9.0/include -internal-externc-isystem /mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot/usr/include/arm-linux-gnueabihf -internal-externc-isystem /mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot/include -internal-externc-isystem /mnt/data/b/build/slave/Linux_ARM/build/src/build/linux/debian_wheezy_arm-sysroot/usr/include -O2 -Werror -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-unused-variable -fdebug-compilation-dir /mnt/data/b/build/slave/Linux_ARM/build/src/out/Release -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -pthread -stack-protector 1 -stack-protector-buffer-size 4 -fallow-half-arguments-and-returns -fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -load /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -add-plugin find-bad-constructs -plugin-arg-find-bad-constructs check-templates -plugin-arg-find-bad-constructs follow-macro-expansion -o obj/third_party/pdfium/third_party/libtiff/fx_tiff.tif_predict.o -x c ../../third_party/pdfium/third_party/libtiff/tif_predict.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'Function Pass Manager' on module '../../third_party/pdfium/third_party/libtiff/tif_predict.c'.
4.	Running pass 'Loop Vectorization' on function '@horDiff8'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 3.9.0 (trunk 263324)
Target: arm--linux-gnueabihf
Thread model: posix
InstalledDir: /mnt/data/b/build/slave/Linux_ARM/build/src/third_party/llvm-build/Release+Asserts/bin
clang: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/tif_predict-a02aea.c
clang: note: diagnostic msg: /tmp/tif_predict-a02aea.sh
clang: note: diagnostic msg: 

********************
ninja: build stopped: subcommand failed.

/usr/bin/python /mnt/data/b/build/slave/Linux_ARM/build/src/build/goma/client/goma_ctl.py jsonstatus /tmp/tmpsg1OxI.json

/usr/bin/python /opt/infra-python/run.py infra.tools.send_ts_mon_values --verbose --ts-mon-target-type task --ts-mon-task-service-name goma-client --ts-mon-task-job-name default --counter "{\"clobber\": 0, \"master\": \"chromium.fyi\", \"name\": \"goma/failure\", \"slave\": \"vm803-m1\", \"builder\": \"Linux ARM\", \"os\": \"linux\", \"start_time\": 1458414991, \"value\": 0, \"result\": \"failure\"}"

/usr/bin/python /mnt/data/b/build/slave/Linux_ARM/build/src/build/goma/client/goma_ctl.py stop
Killing compiler proxy.
compiler proxy status: http://127.0.0.1:8088 quit!