I'm using the Online editor with Chrome notebook, The code complied ok last friday when I prepped it for my students. I tried it with my student today and got this error. Then tried it on my system and got the same error.
Error output:
Linking everything together...
lto1: fatal error: bytecode stream in file '/tmp/160846229/build/../../core/core_arduino_avr_uno_0fd389f0184d5a21fcc443ff311da7f1.a' generated with LTO version 4.1 instead of the expected 6.0
compilation terminated.
lto-wrapper: fatal error: /home/builder/.arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/bin/avr-gcc returned 1 exit status
compilation terminated.
/home/builder/.arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
exit status 1