Build failed.

[mrunix]

$ cargo build -Z build-std=std,core,alloc,panic_abort --target x86_64-unknown-hermit
   Compiling std v0.0.0 (/home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std)
error[E0412]: cannot find type `CommandArgs` in module `imp`
    --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:1022:17
     |
1022 |     inner: imp::CommandArgs<'a>,
     |                 ^^^^^^^^^^^ not found in `imp`

error[E0412]: cannot find type `MovableMutex` in module `mutex_imp`
 --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/condvar.rs:8:33
  |
8 | type CondvarCheck = <mutex_imp::MovableMutex as check::CondvarCheck>::Check;
  |                                 ^^^^^^^^^^^^ not found in `mutex_imp`
  |
help: consider importing this struct
  |
1 | use crate::sys_common::mutex::MovableMutex;
  |

error[E0412]: cannot find type `MovableMutex` in module `imp`
  --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/mutex.rs:64:30
   |
64 | pub struct MovableMutex(imp::MovableMutex);
   |                              ^^^^^^^^^^^^ not found in `imp`
   |
help: consider importing this struct
   |
1  | use crate::sys_common::condvar::MovableMutex;
   |

error[E0433]: failed to resolve: could not find `MovableMutex` in `imp`
  --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/mutex.rs:71:30
   |
71 |         let mut mutex = imp::MovableMutex::from(imp::Mutex::new());
   |                              ^^^^^^^^^^^^ not found in `imp`
   |
help: consider importing this struct
   |
1  | use crate::sys_common::condvar::MovableMutex;
   |

error[E0599]: no method named `get_program` found for struct `hermit::process::Command` in the current scope
   --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:913:20
    |
913 |         self.inner.get_program()
    |                    ^^^^^^^^^^^ method not found in `hermit::process::Command`
    | 
   ::: /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/hermit/process.rs:15:1
    |
15  | pub struct Command {
    | ------------------ method `get_program` not found for this

error[E0599]: no method named `get_args` found for struct `hermit::process::Command` in the current scope
   --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:936:41
    |
936 |         CommandArgs { inner: self.inner.get_args() }
    |                                         ^^^^^^^^ method not found in `hermit::process::Command`
    | 
   ::: /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/hermit/process.rs:15:1
    |
15  | pub struct Command {
    | ------------------ method `get_args` not found for this

error[E0599]: no method named `get_envs` found for struct `hermit::process::Command` in the current scope
   --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:968:20
    |
968 |         self.inner.get_envs()
    |                    ^^^^^^^^ method not found in `hermit::process::Command`
    | 
   ::: /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/hermit/process.rs:15:1
    |
15  | pub struct Command {
    | ------------------ method `get_envs` not found for this

error[E0599]: no method named `get_current_dir` found for struct `hermit::process::Command` in the current scope
   --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:989:20
    |
989 |         self.inner.get_current_dir()
    |                    ^^^^^^^^^^^^^^^ method not found in `hermit::process::Command`
    | 
   ::: /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/hermit/process.rs:15:1
    |
15  | pub struct Command {
    | ------------------ method `get_current_dir` not found for this

error: aborting due to 8 previous errors

Some errors have detailed explanations: E0412, E0433, E0599.
For more information about an error, try `rustc --explain E0412`.
error: could not compile `std`

To learn more, run the command again with --verbose.

$ rustc --version
rustc 1.49.0-nightly (adef9da30 2020-10-13)

[stlankes]

Yes, this is a disadvantage of using a nightly compiler. Sometimes the changes in Rust's standard library required also changes in our kernel. The current issue requires also some changes in the standard library (rust-lang/rust#77610).

I uploaded the latest version of our libOS. Please try again to build the demo with following commands:

cargo update
cargo build

Does it work on your system? If not, please update also the Rust' nightly compiler.

[stlankes]

I got the feedback that it works.

[mrunix]

thanks, I will try it.

[mrunix]

Same errors.

lix@lixos:~/workspace/repos/os/rusty-demo$ cargo update  
    Updating crates.io index  
    Updating num-traits v0.2.12 -> v0.2.14  
lix@lixos:~/workspace/repos/os/rusty-demo$ cargo build -Z build-std=std,core,alloc,panic_abort --target x86_64-unknown-hermit  
   Compiling num-traits v0.2.14
   Compiling std v0.0.0 (/home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std)
error[E0412]: cannot find type `CommandArgs` in module `imp`
    --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:1022:17
     |
1022 |     inner: imp::CommandArgs<'a>,
     |                 ^^^^^^^^^^^ not found in `imp`

error[E0412]: cannot find type `MovableMutex` in module `mutex_imp`
 --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/condvar.rs:8:33lix@lixos:~/workspace/repos/os/rusty-demo$ cargo update
    Updating crates.io index
    Updating num-traits v0.2.12 -> v0.2.14
lix@lixos:~/workspace/repos/os/rusty-demo$ cargo build -Z build-std=std,core,alloc,panic_abort --target x86_64-unknown-hermit
   Compiling num-traits v0.2.14
   Compiling std v0.0.0 (/home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std)
error[E0412]: cannot find type `CommandArgs` in module `imp`
    --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/process.rs:1022:17
     |
1022 |     inner: imp::CommandArgs<'a>,
     |                 ^^^^^^^^^^^ not found in `imp`

error[E0412]: cannot find type `MovableMutex` in module `mutex_imp`
 --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/condvar.rs:8:33
  |
8 | type CondvarCheck = <mutex_imp::MovableMutex as check::CondvarCheck>::Check;
  |                                 ^^^^^^^^^^^^ not found in `mutex_imp`
  |
help: consider importing this struct
  |
1 | use crate::sys_common::mutex::MovableMutex;
  |
  |
8 | type CondvarCheck = <mutex_imp::MovableMutex as check::CondvarCheck>::Check;
  |                                 ^^^^^^^^^^^^ not found in `mutex_imp`
  |
help: consider importing this struct
  |
1 | use crate::sys_common::mutex::MovableMutex;
  |

error[E0412]: cannot find type `MovableMutex` in module `imp`
  --> /home/lix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys_common/mutex.rs:64:30

[stlankes]

Do you use also rustfmt? It is currently broken https://rust-lang-nursery.github.io/rust-toolstate/. Consequently, rustup installs the latest nightly compiler, where rustfmt is available. Unfortunately it is not the latest version of the nightly compiler...

The TravisCI pipeline seems to work.

[mrunix]

I uninstall rustfmt, then cargo update. Still error.

[stlankes]

Do you also use rustup update? You can use rustup to update the toolchain, while cargo is used to update Cargo.lock.

[mrunix]

still error

lix@lixos:~/workspace/repos/os/rusty-demo$ rustc --version
rustc 1.49.0-nightly (ffa2e7ae8 2020-10-24)

[stlankes]

hm, the compiler is too old

$ rustc --version
rustc 1.49.0-nightly (fd542592f 2020-10-26)

Do you installed miri or rls?

[mrunix]

yes, installed rls.

[stlankes]

As long as rls is not built for the current nightly compiler, you have to uninstall it.

[stlankes]

The rustup version allows to specify the toolchain exactly. I did for our demo. Does it now work?

[stlankes]

I close this issue. I think that we solved it. At least GitActions are able to run the application.