Handle exec-sync failure on Windows.
Handle exec-sync failure on Windows.

Stift/Klondike,jochenvangasse/Klondike,fhchina/Klondike,davidvmckay/Klondike,davidvmckay/Klondike,jochenvangasse/Klondike,themotleyfool/Klondike,Stift/Klondike,fhchina/Klondike,davidvmckay/Klondike,Stift/Klondike,jochenvangasse/Klondike,fhchina/Klondike,themotleyfool/Klondike,themotleyfool/Klondike