Simple code won't compile. Both stable and nightly.

[giftal]

Code

Please see the file lib.zip

rustc consumes all the memory while compiling this code. 188Gb of RAM was consumed on server.

Meta

rustc --version --verbose:

rustc

 1.44.1 (c7087fe00 2020-06-17)
rustc 1.46.0-nightly (67100f61e 2020-06-24)

Error output

process didn't exit successfully: `rustc --crate-name directory_trees --edition=2018 directory-trees/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C metadata=e813bd9f91882755 -C extra-filename=-e813bd9f91882755 --out-dir /home/user/RustProjects/directory-bot/target/release/deps -L dependency=/home/user/RustProjects/directory-bot/target/release/deps --extern unchecked_index=/home/user/RustProjects/directory-bot/target/release/deps/libunchecked_index-d1f689d7ce9ce478.rmeta -C target-cpu=native` (signal: 9, SIGKILL: kill)

Backtrace

No backtrace appeared.

process didn't exit successfully: `rustc --crate-name directory_trees --edition=2018 directory-trees/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C metadata=e813bd9f91882755 -C extra-filename=-e813bd9f91882755 --out-dir /home/user/RustProjects/directory-bot/target/release/deps -L dependency=/home/user/RustProjects/directory-bot/target/release/deps --extern unchecked_index=/home/user/RustProjects/directory-bot/target/release/deps/libunchecked_index-d1f689d7ce9ce478.rmeta -C target-cpu=native` (signal: 9, SIGKILL: kill)

[jonas-schievink]

I'm inclined to close this as wontfix. This is a single 16 MB large function. Hardly "simple code" for a Rust compiler.

[giftal]

I'm inclined to close this as wontfix. This is a single 16 MB large function. Hardly "simple code" for a Rust compiler.

Then please state the max.function size as in java, for example. I would also say that C++ compiles such functions as I attached.

[icefoxen]

I dunno, 188 GB seems a pretty reasonable amount of memory to consume while compiling such simple code. (/s)

[giftal]

It's structure is simple, not the size of the code. if-then-else multiple times.
188GB is not a reasonable amount as it grew uncontrollably to that point.

[giftal]

Folks, any update here or plans?

[qarmin]

With rust 1.46 compiling this code on Ubuntu 20.04 shows only error

error[E0601]: `main` function not found in crate `lib`
    --> lib.rs:1:1
     |
1    | / #[allow(clippy::unreadable_literal, clippy::collapsible_if, clippy::...
2    | | #[rustfmt::skip]
3    | | pub fn predict(x : &[f64]) -> f64 {
4    | |         
...    |
2008 | |  alpha
2009 | | }
     | |_^ consider adding a `main` function to `lib.rs`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0601`.

and takes only 1.5 GB of Ram