Esp8266 SD card write/read crashing

Hello

I've compiled my own v204 version of Espruino, using following params:

export FAMILY=ESP8266
export BOARD=ESP8266_4MB
export FLASH_4MB=1
export ESP8266_SDK_ROOT=/mnt/disk1/home/marko/W­orkplace/Espruino/esp-open-sdk/sdk
export PATH=$PATH:/mnt/disk1/home/marko/Workpla­ce/Espruino/esp-open-sdk/xtensa-lx106-el­f/bin
export COMPORT=/dev/ttyUSB0
export USE_FILESYSTEM=1
export USE_NET=1
export USE_TELNET=1
export USE_CRYPTO=1
export USE_GRAPHICS=1
export USE_ESP8266=1
export RELEASE=1

make clean && make $*

And code in Espruino:

    SPI1.setup({ sck:NodeMCU.D5, miso:NodeMCU.D6, mosi:NodeMCU.D7 });
    E.connectSDCard(SPI1, NodeMCU.D8 /*CS*/);
     var f = E.openFile("log.txt", "w");

And constantly it crashes after "reading" or "writing" a file.

 ets Jan  8 2013,rst cause:2, boot mode:(3,0)
load 0x40100000, len 2408, room 16
tail 8
chksum 0xe5
load 0x3ffe8000, len 776, room 0
tail 8
chksum 0x84
load 0x3ffe8310, len 632, room 0
tail 8
chksum 0xd8
csum 0xd8
2nd boot version : 1.6
  SPI Speed      : 80MHz
  SPI Mode       : DIO
  SPI Flash Size & Map: 32Mbit(1024KB+1024KB)
jump to run user1 @ 1000
ãìoì{òg|ìlld$`c|;dgàoãl`ãsdlþ
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v04 (c) 2019 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
Flash map 4MB:1024/1024, manuf 0x5e chip 0x4016

Any ideas why it crashes?