helm-projectile-grep doesn't work, but projectile-grep work well

[FavoRiteKK]

Expected behavior

helm-projectile-grep works well

Actual behavior

Error running timer 'helm-projectile-grep-or-ack': (void-function -union)

Steps to reproduce the problem

type M-x helm-projectile-grep RET

Backtraces if necessary (M-x toggle-debug-on-error)

Debugger entered--Lisp error: (void-function -union) -union(("TAGS") (".#" ".o" "~" ".bin" ".lbin" ".so" ".a" ".ln" ".blg" ".bbl" ".elc" ".lof" ".glo" ".idx" ".lot" ".fmt" ".tfm" ".class" ".fas" ".lib" ".mem" ".x86f" ".sparcf" ".dfsl" ".pfsl" ".d64fsl" ".p64fsl" ".lx64fsl" ".lx32fsl" ".dx64fsl" ".dx32fsl" ".fx64fsl" ".fx32fsl" ".sx64fsl" ".sx32fsl" ".wx64fsl" ".wx32fsl" ".fasl" ".ufsl" ".fsl" ".dxl" ".lo" ".la" ".gmo" ".mo" ".toc" ".aux" ".cp" ".fn" ".ky" ...)) helm-projectile-grep-or-ack("\~/workspace/shared/" nil) apply(helm-projectile-grep-or-ack ("\~/workspace/shared/" nil)) timer-event-handler([t 23696 37954 478834 nil helm-projectile-grep-or-ack ("~/workspace/shared/" nil) nil 505000])

Environment & version information

• helm-projectile version: 0.14.0
• helm version (in helm-pkg.el): 3.1
• projectile version (M-x projectile-version): 2.0.0
• Emacs version (M-x emacs-version): 25.2.1
• OS: Ubuntu 18.04.01

[FavoRiteKK]

Error is not same as #86

[FavoRiteKK]

Can be fixed by opening helm-projectile.el, add require 'dash). Then remove helm-projectile.elc and restart emacs.

[xiongtx]

You must be using an older version of helm-projectile; the current does't use -union from dash.

[FavoRiteKK]

You must be using an older version of helm-projectile; the current does't use -union from dash.

Yes. it is the one and only latest stable release (v0.14.0).