Corrupted data trashes the output

[jarkkojs]

In my Fedora installation /home/jarkko/.cargo/registry/src/index.crates.io-6f17d22bba15001f/vm-memory-0.14.1/src/lib.rs ended up being a corrupted file.

It took me hours to realize, given that the output does not bring any clarity to it. rustc should really have ratelimit detection or something to detect corrupted file instead and inform about this to the user.

[Urgau]

This indeed seems quite confusing; and counter-productive to try to show this blob of errors.

Would you be able to provide us with a reproducible example of the issue? Or if you still have it the corrupted file.

@rustbot labels +T-compiler +A-diagnostics +D-verbose +D-confusing +S-needs-repro -needs-triage

[jarkkojs]

This indeed seems quite confusing; and counter-productive to try to show this blob of errors.

Would you be able to provide us with a reproducible example of the issue? Or if you still have it the corrupted file.

@rustbot labels +T-compiler +A-diagnostics +D-verbose +D-confusing +S-needs-repro -needs-triage

So this a problem because I unfortunately deleted the trashed file before someone told me that I should report this as a bug. I regret that I did not store it :-/

BUT I recalled that it was probably for reason a long string of ANSI escape codes. So I did a test string:

\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)

This creates somewhat similar output as I got, except probably the string was a bit longer in my case.

[jarkkojs]

OK doubling that starts to be almost perfect match:

\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)\1\e[38;5;015m\2uu\1\e[0m\2\1\e[38;2;191;254;33m\2(ins)

[jarkkojs]

... I'm considering T-shirt design ;-) Made by me and rustc.

EDIT: and rendered by excellent terminal emulator foot https://codeberg.org/dnkl/foot

[jarkkojs]

Somehow rustc should be able to detect corrupted file in cargo's source repository (or whatever it is called). It was pretty bizarre sight when I encountered this by accident.

[Urgau]

Thanks for the repro.
@rustbot label -S-needs-repro

[jarkkojs]

Yeah I mean it is really a huge corner case but it can happen in the case of data corruption (e.g. power outage in middle of write operation). I'd detect frequency of errors and maybe a threshold parameter when it is interpreted as corruption with a sane default value.

[chenyukang]

yeah, I believe this error comes out from the phase of lexing, which rustc are trying to find all the mismatched delimiters, maybe a threshold is ok for resolve it.