Intermittent macos build error in mozjs (clang++: cannot execute binary file) (/Library/Developer/CommandLineTools/usr/bin/make: cannot execute binary file)

[jdm]

/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang++ -std=gnu++14 --target=arm-linux-androideabi -o standardplural.o -c  -I/Users/worker/tasks/task_1574189900/repo/target/android/armv7-linux-androideabi/debug/build/mozjs_sys-400e780a292f0a8c/out/dist/system_wrappers -include /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/config/gcc_hidden.h -DNDEBUG=1 -DTRIMMED=1 -DU_I18N_IMPLEMENTATION -DUCONFIG_NO_TRANSLITERATION -DUCONFIG_NO_REGULAR_EXPRESSIONS -DUCONFIG_NO_LEGACY_CONVERSION -DU_USING_ICU_NAMESPACE=0 -DU_NO_DEFAULT_INCLUDE_UTF_HEADERS=1 -DU_CHARSET_IS_UTF8 -DU_HAVE_NL_LANGINFO_CODESET=0 -I/Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/config/external/icu/i18n -I/Users/worker/tasks/task_1574189900/repo/target/android/armv7-linux-androideabi/debug/build/mozjs_sys-400e780a292f0a8c/out/config/external/icu/i18n -I/Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/intl/icu/source/common -I/Users/worker/tasks/task_1574189900/repo/target/android/armv7-linux-androideabi/debug/build/mozjs_sys-400e780a292f0a8c/out/dist/include -fPIC -DMOZILLA_CLIENT -include /Users/worker/tasks/task_1574189900/repo/target/android/armv7-linux-androideabi/debug/build/mozjs_sys-400e780a292f0a8c/out/js/src/js-confdefs.h -Qunused-arguments -isystem /Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/platforms/android-21/arch-arm/usr/include -isystem /Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/platforms/android-21/arch-arm/usr/include -gcc-toolchain /Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 -D__ANDROID_API__=21 --target=armv7-linux-androideabi --sysroot=/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sysroot -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sysroot/usr/include/arm-linux-androideabi -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -Qunused-arguments -Wall -Wbitfield-enum-conversion -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wshadow-field-in-constructor-modified -Wsign-compare -Wtype-limits -Wunreachable-code -Wunreachable-code-return -Wwrite-strings -Wno-invalid-offsetof -Wclass-varargs -Wfloat-overflow-conversion -Wfloat-zero-conversion -Wloop-analysis -Wc++1z-compat -Wcomma -Wimplicit-fallthrough -Wstring-conversion -Wtautological-overlap-compare -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wformat -Wformat-security -Wno-gnu-zero-variadic-macro-arguments -Wno-unknown-warning-option -Wno-return-type-c-linkage -fno-sized-deallocation -fno-short-enums -fno-exceptions --target=armv7-linux-androideabi --sysroot=/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sysroot --gcc-toolchain=/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/android/cpufeatures -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/cxx-stl/llvm-libc++/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/5.0/include -isystem /Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sysroot/usr/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/cxx-stl/llvm-libc++abi/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/5.0/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sysroot/usr/include/arm-linux-androideabi -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/android/support/include -L/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x -B/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/platforms/android-21/arch-arm/usr/lib -L/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/platforms/android-21/arch-arm/usr/lib -D__ANDROID_API__=21 -D__STDC_CONSTANT_MACROS -D__NDK_FPABI__= -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/cxx-stl/llvm-libc++/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/android/support/include -I/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/sources/cxx-stl/llvm-libc++abi/include -march=armv7-a -mfpu=neon -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -pipe -g -O3 -fomit-frame-pointer -funwind-tables -frtti  -MD -MP -MF .deps/standardplural.o.pp   /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/intl/icu/source/i18n/standardplural.cpp

/Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang++: /Users/worker/tasks/task_1574189900/repo/android-toolchains/ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang++: cannot execute binary file
make[4]: *** [standardplural.o] Error 126

[jdm]

--- stderr
Reticulating splines...
Finished reading 51 moz.build files in 0.24s
Read 0 gyp files in parallel contributing 0.00s to total wall time
Processed into 205 build config descriptors in 0.66s
RecursiveMake backend executed in 0.65s
  141 total backend files; 141 created; 0 updated; 0 unchanged; 0 deleted; 6 -> 32 Makefile
Total wall time: 1.61s; CPU time: 1.32s; Efficiency: 82%; Untracked: 0.07s
/usr/bin/clang++: /usr/bin/clang++: cannot execute binary file
make[4]: *** [Unified_cpp_js_src10.o] Error 126
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [js/src/target-objects] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [compile] Error 2
make[1]: *** [default] Error 2
make: *** [all] Error 2