Formatting @generated from stdin results in empty output

[bjorn3]

This causes rust-analyzer to discard the entire file if you try to format it. See rust-lang/rust-analyzer#11285.

$ echo "//@notgenerated\nfn   foo() {}" | rustfmt
//@notgenerated
fn foo() {}
$ echo "//@generated\nfn   foo() {}" | rustfmt
$ rustfmt -V
rustfmt 1.4.38-stable (02072b4 2022-01-11)

[calebcartwright]

This causes rust-analyzer to discard the entire file

Just to clarify, are you seeing this strictly with stdin or both stdin and files? I can reproduce the former, but not the latter

[Ten0]

Strictly with stdin. IIUC the files he refers to are files manipulated by rust-analyzer.

[bjorn3]

Indeed. Rust-analyzer writes the file to rustfmt's stdin as most of the time the changes made by the user haven't been saved yet.

[calebcartwright]

Thanks for clarifying. Will get the resolution for this pulled in after work today, and it'll get pulled into a 1.58.1 patch release that fortunately was already being considered/planned

[calebcartwright]

Going to close as there's nothing left to do now but wait for the releases to go out, thanks again for the reports!