On Ubuntu 16 (virtualbox vm)
$ uname -a
Linux ibon-vb 4.10.0-28-generic #32~16.04.2-Ubuntu SMP Thu Jul 20 10:19:48 
UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

I am having some trouble compiling v8 lkgr branch with the following error:

ninja -C out.gn/android_arm.release -j 4

ninja: Entering directory `out.gn/android_arm.release'
[1/1] Regenerating ninja files
[1226/1813] ACTION 
//:run_mksnapshot(/...d/toolchain/android:android_clang_arm)
FAILED: gen/snapshot.cc snapshot_blob.bin 
python ../../tools/run.py ./clang_x86_v8_arm/mksnapshot 
--turbo_instruction_scheduling --startup_src *gen/snapshot.cc* 
--random-seed 314159265 --startup_blob snapshot_blob.bin
Traceback (most recent call last):
  File "../../tools/run.py", line 12, in <module>
    sys.exit(subprocess.call(sys.argv[1:]))
  File "/usr/lib/python2.7/subprocess.py", line 523, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
ninja: build stopped: subcommand failed.

Apparently latest v8gen.py file is not generating the expected snapshot.cc 
file. It also is not creating other expected files and folders created by 
previous v8gen.py versions like `include` folder.
Since context creation performance is not my current use case, I have tried 
setting in args.gn file `v8_use_snapshot=false` but i still get the same 
error.

I was able to build v8 5.9-lkgr flawlessly but updating with `gclient sync` 
has broken compilation for this version as well.

Any help would be appreciated.
Thanks.

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