lto-wrapper failed

[randallscience]

Arduino web editor will not verify example code such as Bare minimum and blink.
Error message is lto-wrapper failed

./opt/arduino-builder/arduino-builder -compile -core-api-version 10611 -hardware opt/arduino-builder/hardware -hardware ./opt/cores -tools opt/arduino-builder/tools -tools ./opt/tools -built-in-libraries opt/libraries/latest -logger humantags -fqbn arduino:avr:uno -build-cache /tmp -build-path /tmp/790306953/build -verbose -prefs runtime.tools.avr-gcc.path=./opt/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs runtime.tools.avrdude.path=./opt/tools/avrdude/6.3.0-arduino14 -prefs runtime.tools.arduinoOTA.path=./opt/tools/arduinoOTA/1.2.1 -libraries /tmp/790306953/custom -libraries /tmp/790306953/pinned /tmp/790306953/BareMinimum

Linking everything together...

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

[snissim]

I'm getting this too, only as of today.

[snissim]

It works for Arduino/Genuino 101, but not Uno, for example.

[Geoff2018]

Argh! I'm supposed to be showing some students this editor tomorrow and now I'm getting this error!

[Claudicloud10]

I have the same issue, as of today.

[ARjeff9845]

ditto

[meidlmarkus]

I have this too since a couple of hours

[salasek]

Oh, thank goodness! I've been struggling with this for a while not knowing it wasn't just me! I'll try copying code to the local desktop app. >:(

[Rob1022]

This was working yesterday but not today. Exactly the same error as shown above.

Using Win 10 home edition (current version) Chrome browser (current version)

MSI Laptop

Cheers

[salasek]

I copied and pasted the code into the desktop app which worked.

[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
• I keep getting this message when i try to upload the code to my arduino. - Web Editor - Arduino Forum
• Error verifying ALL my code. - Web Editor - Arduino Forum
• fatal error with chrome - Chrome App - Arduino Forum
• Arduino web editor Linking Everything Together fatal error - Web Editor - Arduino Forum
• Exit Status 1 Problem - Web Editor - Arduino Forum
• Arduino Web Editor - Fatal Error - bytecode stream generated with LTO version 3. - 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.

This is an Arduino Web Editor specific problem so the workaround is to use the regular Arduino IDE, which you can download for free from:

Software

[endorama]

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

Thank you.

[Geoff]

Seems to be working now.

Thanks ...