Using command org-dblock-update in the following piece of org-mode text
result in emacs hanging (but can exit using C-g key combo). The primary
reason I found for the issue is the use of ‘:tags “hello”. If I remove
it, the report will be generated.

here is the text resulting the hanging of command org-dblock-update

** hh
#+BEGIN: clocktable :maxlevel 5 :scope subtree :tags "hello"

#+END:
*** gogogo                                                            :hello:
    :LOGBOOK:
    CLOCK: [2016-07-26 Tue 12:45]--[2016-07-26 Tue 13:45] =>  1:00
    :END:

Emacs : GNU Emacs 24.5.1 (i686-pc-mingw32)
of 2015-04-11 on LEG570
Package: Org-mode version 8.2.10 (release_8.2.10 @ c:/Program
Files/emacs/share/emacs/24.5/lisp/org/)
current state:

(setq
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-clock-in-resume t
 org-edit-timestamp-down-means-later t
 org-clock-persist t
 org-agenda-window-setup 'current-window
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-src-native-tab-command-maybe
                      org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-refile-targets '((nil :maxlevel . 5) (org-agenda-files :maxlevel . 5))
 org-cycle-hook '(org-cycle-hide-archived-subtrees
org-cycle-hide-drawers org-cycle-hide-inline-tasks
                  org-cycle-show-empty-lines
org-optimize-window-after-visibility-change)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-babel-pre-tangle-hook '(save-buffer)
 org-occur-hook '(org-first-headline-recenter)
 org-log-done 'time
 org-clock-out-remove-zero-time-clocks t
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-fast-tag-selection-single-key 'expert
 org-agenda-span 14
 org-clock-in-hook '(sanityinc/show-org-clock-in-header-line)
 org-clock-cancel-hook '(sanityinc/hide-org-clock-from-header-line)
 org-refile-use-outline-path 'file
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer
sanityinc/hide-org-clock-from-header-line)
 org-completion-use-ido t
 org-agenda-include-diary t
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
org-show-block-all append local] 5]
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
org-babel-show-result-all append local] 5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-clock-into-drawer t
 org-agenda-start-on-weekday nil
 org-tags-column 80
 org-clock-in-switch-to-state "STARTED"
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-todo-keywords '((sequence "TODO(t)" "STARTED(s)" "|" "DONE(d!/!)")
                     (sequence "WAITING(w@/!)" "SOMEDAY(S)" "|"
"CANCELLED(c@/!)"))
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-confirm-shell-link-function 'yes-or-no-p
 )
​

​