- The script now runs more checks.
 - Fixing diff against master

This patch fixes problems reported by clang-tidy after enabling the following
checks:
modernize-use-nullptr
misc-use-after-move
misc-virtual-near-miss
misc-multiple-statement-macro
misc-move-constructor-init
misc-move-forwarding-reference
misc-assert-side-effect
misc-dangling-handle
misc-move-constructor-init
misc-move-forwarding-reference
misc-non-copyable-objects
misc-forwarding-reference-overload

…dataflow

- fixed another potential use after move problem
- fixed memory leak (dataflow was leaking its shared state)
- simplified function operator implementation for resume_state_callable