[INFO] cloning repository https://github.com/michaelgerakis/blackberry
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelgerakis/blackberry" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f96e0c7eaafd9e64142d9bb4b87f33eb3a17c3e5
[INFO] checking michaelgerakis/blackberry against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry" "/workspace/builds/worker-100/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-100/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (172/188)
Updating files:  92% (173/188)
Updating files:  93% (175/188)
Updating files:  94% (177/188)
Updating files:  95% (179/188)
Updating files:  96% (181/188)
Updating files:  97% (183/188)
Updating files:  98% (185/188)
Updating files:  99% (187/188)
Updating files: 100% (188/188)
Updating files: 100% (188/188), done.
[INFO] validating manifest of git repo https://github.com/michaelgerakis/blackberry on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-100/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/michaelgerakis/blackberry
[INFO] finished tweaking git repo https://github.com/michaelgerakis/blackberry
[INFO] tweaked toml for git repo https://github.com/michaelgerakis/blackberry written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] crate git repo https://github.com/michaelgerakis/blackberry already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb97c2a2ac3c6f6b818c5683f593ad52fc91d1c36c5bad2b2fbe5614af83b71c
[INFO] running `Command { std: "docker" "start" "-a" "fb97c2a2ac3c6f6b818c5683f593ad52fc91d1c36c5bad2b2fbe5614af83b71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb97c2a2ac3c6f6b818c5683f593ad52fc91d1c36c5bad2b2fbe5614af83b71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb97c2a2ac3c6f6b818c5683f593ad52fc91d1c36c5bad2b2fbe5614af83b71c", kill_on_drop: false }`
[INFO] [stdout] fb97c2a2ac3c6f6b818c5683f593ad52fc91d1c36c5bad2b2fbe5614af83b71c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eab8f81395789b99bab336c310cd2c910f56f02554aad7de4f99f028e326967b
[INFO] running `Command { std: "docker" "start" "-a" "eab8f81395789b99bab336c310cd2c910f56f02554aad7de4f99f028e326967b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking volatile v0.1.0 (/opt/rustwide/workdir/volatile)
[INFO] [stderr]     Checking stack-vec v0.1.1 (/opt/rustwide/workdir/stack-vec)
[INFO] [stderr]     Checking std v0.1.0 (/opt/rustwide/workdir/std)
[INFO] [stderr]     Checking xmodem v0.1.1 (/opt/rustwide/workdir/xmodem)
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]  --> volatile/src/traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     #[inline(always)]
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> volatile/src/traits.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:258:12
[INFO] [stdout]     |
[INFO] [stdout] 258 | #![feature(const_fn)]
[INFO] [stdout]     |            ^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:280:12
[INFO] [stdout]     |
[INFO] [stdout] 280 | #![feature(link_args)]
[INFO] [stdout]     |            ^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: removed in favor of using `-C link-arg=ARG` on command line, which is available from cargo build scripts with `cargo:rustc-link-arg` now
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:282:12
[INFO] [stdout]     |
[INFO] [stdout] 282 | #![feature(macro_reexport)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: subsumed by `pub use`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 288 | #![feature(on_unimplemented)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:290:12
[INFO] [stdout]     |
[INFO] [stdout] 290 | #![feature(optin_builtin_traits)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:323:12
[INFO] [stdout]     |
[INFO] [stdout] 323 | #![feature(doc_spotlight)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: renamed to `doc_notable_trait`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3592:24
[INFO] [stdout]      |
[INFO] [stdout] 3592 |         map.entry(100) <- 100;
[INFO] [stdout]      |                        ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3592 |         map.entry(100) < - 100;
[INFO] [stdout]      |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3595:22
[INFO] [stdout]      |
[INFO] [stdout] 3595 |         map.entry(0) <- 10;
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3595 |         map.entry(0) < - 10;
[INFO] [stdout]      |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3610:79
[INFO] [stdout]      |
[INFO] [stdout] 3610 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(0) <- mkpanic(); }));
[INFO] [stdout]      |                                                                               ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3610 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(0) < - mkpanic(); }));
[INFO] [stdout]      |                                                                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3615:81
[INFO] [stdout]      |
[INFO] [stdout] 3615 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(100) <- mkpanic(); }));
[INFO] [stdout]      |                                                                                 ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3615 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(100) < - mkpanic(); }));
[INFO] [stdout]      |                                                                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3636:78
[INFO] [stdout]      |
[INFO] [stdout] 3636 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { hm.entry(0) <- makepanic(); }));
[INFO] [stdout]      |                                                                              ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3636 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { hm.entry(0) < - makepanic(); }));
[INFO] [stdout]      |                                                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pi v0.1.0 (/opt/rustwide/workdir/pi)
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]    --> std/src/lib.rs:369:1
[INFO] [stdout]     |
[INFO] [stdout] 369 | extern crate std_unicode;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 12 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `std` due to 13 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]  --> volatile/src/traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     #[inline(always)]
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> volatile/src/traits.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:258:12
[INFO] [stdout]     |
[INFO] [stdout] 258 | #![feature(const_fn)]
[INFO] [stdout]     |            ^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:280:12
[INFO] [stdout]     |
[INFO] [stdout] 280 | #![feature(link_args)]
[INFO] [stdout]     |            ^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: removed in favor of using `-C link-arg=ARG` on command line, which is available from cargo build scripts with `cargo:rustc-link-arg` now
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:282:12
[INFO] [stdout]     |
[INFO] [stdout] 282 | #![feature(macro_reexport)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: subsumed by `pub use`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 288 | #![feature(on_unimplemented)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:290:12
[INFO] [stdout]     |
[INFO] [stdout] 290 | #![feature(optin_builtin_traits)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> std/src/lib.rs:323:12
[INFO] [stdout]     |
[INFO] [stdout] 323 | #![feature(doc_spotlight)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: renamed to `doc_notable_trait`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3592:24
[INFO] [stdout]      |
[INFO] [stdout] 3592 |         map.entry(100) <- 100;
[INFO] [stdout]      |                        ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3592 |         map.entry(100) < - 100;
[INFO] [stdout]      |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3595:22
[INFO] [stdout]      |
[INFO] [stdout] 3595 |         map.entry(0) <- 10;
[INFO] [stdout]      |                      ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3595 |         map.entry(0) < - 10;
[INFO] [stdout]      |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3610:79
[INFO] [stdout]      |
[INFO] [stdout] 3610 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(0) <- mkpanic(); }));
[INFO] [stdout]      |                                                                               ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3610 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(0) < - mkpanic(); }));
[INFO] [stdout]      |                                                                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3615:81
[INFO] [stdout]      |
[INFO] [stdout] 3615 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(100) <- mkpanic(); }));
[INFO] [stdout]      |                                                                                 ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3615 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { map.entry(100) < - mkpanic(); }));
[INFO] [stdout]      |                                                                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `<-`
[INFO] [stdout]     --> std/src/collections/hash/map.rs:3636:78
[INFO] [stdout]      |
[INFO] [stdout] 3636 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { hm.entry(0) <- makepanic(); }));
[INFO] [stdout]      |                                                                              ^^
[INFO] [stdout]      |
[INFO] [stdout] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stdout]      |
[INFO] [stdout] 3636 |         let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { hm.entry(0) < - makepanic(); }));
[INFO] [stdout]      |                                                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]  --> volatile/src/traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     #[inline(always)]
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> volatile/src/traits.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> stack-vec/src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(test, feature(inclusive_range_syntax))]
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]    --> std/src/lib.rs:369:1
[INFO] [stdout]     |
[INFO] [stdout] 369 | extern crate std_unicode;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 12 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> pi/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(untagged_unions)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "eab8f81395789b99bab336c310cd2c910f56f02554aad7de4f99f028e326967b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eab8f81395789b99bab336c310cd2c910f56f02554aad7de4f99f028e326967b", kill_on_drop: false }`
[INFO] [stdout] eab8f81395789b99bab336c310cd2c910f56f02554aad7de4f99f028e326967b
