signal: segmentation fault (core dumped)

Hey Guys,

after searching and trying to solv emy Problem I now ask You Guys. Since Today I cant compile simple Code no matter self written or from the Examples on any Arduino Board. When I use the NodeMCU Board everythin works fine.
Here is my Error:

"/usr/bin/avr-gcc-ar" rcs  "/tmp/arduino_build_636407/core/core.a" "/tmp/arduino_build_636407/core/wiring_pulse.S.o"
signal: segmentation fault (core dumped)
Error compiling for board Arduino/Genuino Uno.

I have the same problem before, and I solve this by downgrading "avr-gcc" to 6.3.0 version. Maybe you can try this too.