nice portupgrade llvm40
[Reading data from pkg(8) ... - 598 packages found - done]
[Updating the portsdb <format:bdb_btree> in /usr/ports ... - 26992 port entries found .........1000.........2000.........3000.........4000.........5000.........6000.........7000.........8000.........9000.........10000.........11000.........12000.........13000.........14000.........15000.........16000.........17000.........18000.........19000.........20000.........21000.........22000.........23000.........24000.........25000.........26000......... ..... done]
--->  Upgrading 'llvm40-4.0.0_2' to 'llvm40-4.0.0_4' (devel/llvm40)
--->  Building '/usr/ports/devel/llvm40'
===>  Cleaning for python27-2.7.13_2
===>  Cleaning for llvm40-4.0.0_4
===>  License LLVM accepted by the user
===>   llvm40-4.0.0_4 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by llvm40-4.0.0_4 for building
===>  Extracting for llvm40-4.0.0_4
=> SHA256 Checksum OK for llvm-4.0.0.src.tar.xz.
=> SHA256 Checksum OK for cfe-4.0.0.src.tar.xz.
=> SHA256 Checksum OK for openmp-4.0.0.src.tar.xz.
/bin/mv /tmp/usr/ports/devel/llvm40/work/cfe-4.0.0.src /tmp/usr/ports/devel/llvm40/work/llvm-4.0.0.src/tools/clang
/bin/mv /tmp/usr/ports/devel/llvm40/work/openmp-4.0.0.src /tmp/usr/ports/devel/llvm40/work/llvm-4.0.0.src/tools/openmp
===>  Patching for llvm40-4.0.0_4
sed: tools/clang/tools/extra/clang-tidy/tool/clang-tidy-diff.py: No such file or directory
*** Error code 1

Stop.
make[1]: stopped in /usr/ports/devel/llvm40
*** Error code 1

Stop.
make: stopped in /usr/ports/devel/llvm40
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade20170417-8462-ds0nsf env UPGRADE_TOOL=portupgrade UPGRADE_PORT=llvm40-4.0.0_2 UPGRADE_PORT_VER=4.0.0_2 make
** Fix the problem and try again.
** Listing the failed packages (-:ignored / *:skipped / !:failed)
        ! devel/llvm40 (llvm40-4.0.0_2) (unknown build error)