I keep getting this message when i try to upload the code to my arduino.

[Whiteknight1452]

lto1: fatal error: bytecode stream generated with LTO version 3.0 instead of the expected 4.1

compilation terminated.

lto-wrapper: fatal error: ./opt/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2/bin/avr-gcc returned 1 exit status

compilation terminated.

/home/ubuntu/opt/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld: error: lto-wrapper failed

collect2: error: ld returned 1 exit status

exit status 1

[pert]

There are multiple other reports of this bug:

• http://forum.arduino.cc/index.php?topic=576587
• Issue with Arduino Web Editor - 30 October 2018 - Web Editor - Arduino Forum
• Error compiling ANY code with Web Editor, even proved code. - Web Editor - Arduino Forum
• LTO error when verifying sketch, UNO - Web Editor - Arduino Forum
• Problems getting code verified and uploaded using Arduino Create online IDE - Web Editor - Arduino Forum
• lto-wrapper failed - Web Editor - Arduino Forum
• wont compile - Web Editor - Arduino Forum
• Issue with Web Editor? Unable to compile sketches. - Web Editor - Arduino Forum
• Error verifying ALL my code. - Web Editor - Arduino Forum

I recommend subscribing to those threads so that you'll be sure to get news of any progress in fixing it.

[endorama]

Hello, please follow topic Issue 2018-10-30: lto-wrapper error prevent compilations for further information and updates about this.

Thank you.