[INFO] fetching crate math-rs 0.1.5...
[INFO] checking math-rs-0.1.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate math-rs 0.1.5 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate math-rs 0.1.5 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate math-rs 0.1.5
[INFO] finished tweaking crates.io crate math-rs 0.1.5
[INFO] tweaked toml for crates.io crate math-rs 0.1.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 26 packages
[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77f41a0a88cfcc4e3277ecd081381e44f7aeff6cc72e20e9f4a5ce79a4af169e
[INFO] running `Command { std: "docker" "start" "-a" "77f41a0a88cfcc4e3277ecd081381e44f7aeff6cc72e20e9f4a5ce79a4af169e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77f41a0a88cfcc4e3277ecd081381e44f7aeff6cc72e20e9f4a5ce79a4af169e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77f41a0a88cfcc4e3277ecd081381e44f7aeff6cc72e20e9f4a5ce79a4af169e", kill_on_drop: false }`
[INFO] [stdout] 77f41a0a88cfcc4e3277ecd081381e44f7aeff6cc72e20e9f4a5ce79a4af169e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc11762abcd2979863b37e03c21f8dce4867bb457fceb423bf83c3fec1aca18f
[INFO] running `Command { std: "docker" "start" "-a" "cc11762abcd2979863b37e03c21f8dce4867bb457fceb423bf83c3fec1aca18f", kill_on_drop: false }`
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]     Checking wasm-bindgen v0.2.92
[INFO] [stderr]     Checking tracing-wasm v0.2.1
[INFO] [stderr]     Checking math-rs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `matrix_f32` is imported redundantly
[INFO] [stdout]    --> src/matrix/float/f32.rs:229:17
[INFO] [stdout]     |
[INFO] [stdout] 12  | / macro_rules! matrix_f32 {
[INFO] [stdout] 13  | |     ($expression:tt, $tol:expr) => {
[INFO] [stdout] 14  | |         MatrixF32::parse($expression, $tol)
[INFO] [stdout] 15  | |     };
[INFO] [stdout] 16  | | }
[INFO] [stdout]     | |_- the item `matrix_f32` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 229 |       use super::{matrix_f32, MatrixF32};
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pretty_assertions` is imported redundantly
[INFO] [stdout]    --> src/matrix/float/f32.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     use pretty_assertions;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ the item `pretty_assertions` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `macros::*`
[INFO] [stdout]  --> src/matrix/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use macros::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `matrix_f32`
[INFO] [stdout]   --> src/matrix/float/f32.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use matrix_f32;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `macros::*`
[INFO] [stdout]  --> src/matrix/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use macros::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.11s
[INFO] running `Command { std: "docker" "inspect" "cc11762abcd2979863b37e03c21f8dce4867bb457fceb423bf83c3fec1aca18f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc11762abcd2979863b37e03c21f8dce4867bb457fceb423bf83c3fec1aca18f", kill_on_drop: false }`
[INFO] [stdout] cc11762abcd2979863b37e03c21f8dce4867bb457fceb423bf83c3fec1aca18f
[INFO] checking math-rs-0.1.5 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate math-rs 0.1.5 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate math-rs 0.1.5 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate math-rs 0.1.5
[INFO] finished tweaking crates.io crate math-rs 0.1.5
[INFO] tweaked toml for crates.io crate math-rs 0.1.5 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 26 packages
[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a01ba8338f28378c86cd399dc8acaa68f0369f59c53b84e92b36f5d4a1b33c1
[INFO] running `Command { std: "docker" "start" "-a" "6a01ba8338f28378c86cd399dc8acaa68f0369f59c53b84e92b36f5d4a1b33c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a01ba8338f28378c86cd399dc8acaa68f0369f59c53b84e92b36f5d4a1b33c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a01ba8338f28378c86cd399dc8acaa68f0369f59c53b84e92b36f5d4a1b33c1", kill_on_drop: false }`
[INFO] [stdout] 6a01ba8338f28378c86cd399dc8acaa68f0369f59c53b84e92b36f5d4a1b33c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa45992cac043c7a6e5c6f745bdc8b32e75e87159db6940b72f279b0a7656ec3
[INFO] running `Command { std: "docker" "start" "-a" "fa45992cac043c7a6e5c6f745bdc8b32e75e87159db6940b72f279b0a7656ec3", kill_on_drop: false }`
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]     Checking wasm-bindgen v0.2.92
[INFO] [stderr]     Checking tracing-wasm v0.2.1
[INFO] [stderr]     Checking math-rs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `matrix_f32`
[INFO] [stdout]   --> src/matrix/float/f32.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use matrix_f32;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `matrix_f32` is imported redundantly
[INFO] [stdout]    --> src/matrix/float/f32.rs:229:17
[INFO] [stdout]     |
[INFO] [stdout] 12  | / macro_rules! matrix_f32 {
[INFO] [stdout] 13  | |     ($expression:tt, $tol:expr) => {
[INFO] [stdout] 14  | |         MatrixF32::parse($expression, $tol)
[INFO] [stdout] 15  | |     };
[INFO] [stdout] 16  | | }
[INFO] [stdout]     | |_- the item `matrix_f32` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 229 |       use super::{matrix_f32, MatrixF32};
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `macros::*`
[INFO] [stdout]  --> src/matrix/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use macros::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pretty_assertions` is imported redundantly
[INFO] [stdout]    --> src/matrix/float/f32.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     use pretty_assertions;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ the item `pretty_assertions` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `macros::*`
[INFO] [stdout]  --> src/matrix/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use macros::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.73s
[INFO] running `Command { std: "docker" "inspect" "fa45992cac043c7a6e5c6f745bdc8b32e75e87159db6940b72f279b0a7656ec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa45992cac043c7a6e5c6f745bdc8b32e75e87159db6940b72f279b0a7656ec3", kill_on_drop: false }`
[INFO] [stdout] fa45992cac043c7a6e5c6f745bdc8b32e75e87159db6940b72f279b0a7656ec3