Rustc error categories

data.json

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extractor.fish

echo -n '{'
for e in (seq 1 800)
     set code (printf "E%04i" $e)
     set categ (rg -l -g '!rustc_error_codes' $code compiler/ | head -n1 | cut -d/ -f2 | sed s/rustc_//)
     [ ! -z "$categ" ]; and echo -en "\"$code\":\"$categ\","
 end
 echo '}'