https://github.com/esp8266/Arduino/commit/eb596d596c2e6ad97749e09bd8774fceadddb594
can test it in the evening, at earliest.
EDIT:
igrr showed me the solution. discussed this on https://gitter.im/esp8266/Arduino
oh i see in the forum thread that you are using "Generic ESP8266" as your board selection. This won't work.
You need to select "NodeMCU 1.0"
There was an issue with NodeMCU 0.9 (yellow one) — i haven't changed reset method from ck to nodemcu in boards.txt file.
Have just fixed that today.
@igrr: that was the idea I needed. Like we discussed here: viewtopic.php?f=32&t=4432 the generic module has more parameters especially for spiffs. I just changed the reset method for the generic esp8266 to nodemcu, like you described. And voila....working
Not to loose the origin, I just made a duplicate of the "Generic ESP8266". Changing the all "generic." to "generic2." Also given a new name: "generic2.name=Generic ESP8266 Module (Autoflash)"
ESP8266 Arduino add-on
Arduino IDE 1.6.5