Haskell mode REPL hanging

[Eason0210]

Hi Purcell,

I found an issue in haskell mode. When I use C-c, C-l to load file to RPEL, the REPl will freeze.
The detailed steps are as below:

1. Load a haskell file into a new GHCi session using C-c C-l
2. Use the REPL to evaluate functions, it worked well for this moment
3. Switch back to the source code using eitherC-c C-zor C-x o
4. Make some changes, or add more functions and save source with C-x, C-s.
5. Use C-c C-l to load file again, and use C-x, o to switch to the REPL
6. And then REPl hangs , C-q can exit the hanging, but need to restart emacs to restore normal.

My system info:
Window 10 pro 1903
emacs-26.2-x86_64

I tried to disabled flycheck and company , the issue still exist. But I tried to install Haskell-mode in my personal emacs config , there is no this issue.

I use M-x toggle-debug-on-quit to enable the debug mode and get the infomation as below picture(you can get details form the file attached):

debug log

I also searched issues from Haskell -mode of github and goole.
I just found a similar issue but no finall solution.
haskell/haskell-mode#447

So can you give me some advice or directions , how I can dig for it?
Thank you in advance.

[Eason0210]

This is a Windows 10 specific issue, I have been move to linux and Mac osx, and everything works well now.