Auto merge of rust-lang#35431 - GuillaumeGomez:err_codes, r=jonathand…

…turner

Err codes

r? @jonathandturner

1.10.0 release

1.9.0 release

1.8.0 release

1.7.0 release

1.6.0 release

1.5.0 release

1.4.0 release

1.3.0 release

1.2.0 release