[INFO] fetching crate discrete_system 0.1.1...
[INFO] checking discrete_system-0.1.1 against try#919137c0f5006b7edb81cae76cfeed542cd38b82 for pr-116494-1
[INFO] extracting crate discrete_system 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate discrete_system 0.1.1 on toolchain 919137c0f5006b7edb81cae76cfeed542cd38b82
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+919137c0f5006b7edb81cae76cfeed542cd38b82" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate discrete_system 0.1.1
[INFO] finished tweaking crates.io crate discrete_system 0.1.1
[INFO] tweaked toml for crates.io crate discrete_system 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+919137c0f5006b7edb81cae76cfeed542cd38b82" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+919137c0f5006b7edb81cae76cfeed542cd38b82" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+919137c0f5006b7edb81cae76cfeed542cd38b82" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71d64d91f500b0e95921e04fe6ba46db532db080577c0b58e02afca9cb765778
[INFO] running `Command { std: "docker" "start" "-a" "71d64d91f500b0e95921e04fe6ba46db532db080577c0b58e02afca9cb765778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71d64d91f500b0e95921e04fe6ba46db532db080577c0b58e02afca9cb765778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71d64d91f500b0e95921e04fe6ba46db532db080577c0b58e02afca9cb765778", kill_on_drop: false }`
[INFO] [stdout] 71d64d91f500b0e95921e04fe6ba46db532db080577c0b58e02afca9cb765778
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+919137c0f5006b7edb81cae76cfeed542cd38b82" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cc35f5961e562dfe89c381c10d09e4c58c46d36434db2eb5a37ae93ee526ffb
[INFO] running `Command { std: "docker" "start" "-a" "2cc35f5961e562dfe89c381c10d09e4c58c46d36434db2eb5a37ae93ee526ffb", kill_on_drop: false }`
[INFO] [stderr]     Checking moddef v0.1.0
[INFO] [stderr]     Checking discrete_system v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when computing whether impls specialize one another
[INFO] [stdout]   --> src/siso.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | default impl<T, const L: usize> SISO<T, T> for [T; L]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which immediately requires computing whether impls specialize one another again
[INFO] [stdout] note: cycle used when building specialization graph of trait `siso::SISO`
[INFO] [stdout]   --> src/siso.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | pub trait SISO<Input, Output>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when computing whether impls specialize one another
[INFO] [stdout]   --> src/siso.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | default impl<T, const L: usize> SISO<T, T> for [T; L]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which immediately requires computing whether impls specialize one another again
[INFO] [stdout] note: cycle used when building specialization graph of trait `siso::SISO`
[INFO] [stdout]   --> src/siso.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | pub trait SISO<Input, Output>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0391`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0391`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discrete_system` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `discrete_system` (lib test) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2cc35f5961e562dfe89c381c10d09e4c58c46d36434db2eb5a37ae93ee526ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cc35f5961e562dfe89c381c10d09e4c58c46d36434db2eb5a37ae93ee526ffb", kill_on_drop: false }`
[INFO] [stdout] 2cc35f5961e562dfe89c381c10d09e4c58c46d36434db2eb5a37ae93ee526ffb