[INFO] fetching crate statslib 0.1.0...
[INFO] checking statslib-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate statslib 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate statslib 0.1.0 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 statslib 0.1.0
[INFO] finished tweaking crates.io crate statslib 0.1.0
[INFO] tweaked toml for crates.io crate statslib 0.1.0 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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 79 packages
[INFO] [stderr]       Adding approx v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding argmin v0.4.7 (latest: v0.10.0)
[INFO] [stderr]       Adding nalgebra v0.26.2 (latest: v0.32.5)
[INFO] [stderr]       Adding num-complex v0.3.1 (latest: v0.4.5)
[INFO] [stderr]       Adding num-rational v0.3.2 (latest: v0.4.1)
[INFO] [stderr]       Adding simba v0.4.0 (latest: v0.8.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded take_mut v0.2.2
[INFO] [stderr]   Downloaded slog-async v2.8.0
[INFO] [stderr]   Downloaded slog-json v2.6.1
[INFO] [stderr]   Downloaded slog-term v2.9.1
[INFO] [stderr]   Downloaded simba v0.4.0
[INFO] [stderr]   Downloaded argmin v0.4.7
[INFO] [stderr]   Downloaded nalgebra v0.26.2
[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] 9eeab7a1b6f3b28e0691ce991baffd6b1da6148f9c2d87656a5041950c84bf5e
[INFO] running `Command { std: "docker" "start" "-a" "9eeab7a1b6f3b28e0691ce991baffd6b1da6148f9c2d87656a5041950c84bf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9eeab7a1b6f3b28e0691ce991baffd6b1da6148f9c2d87656a5041950c84bf5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9eeab7a1b6f3b28e0691ce991baffd6b1da6148f9c2d87656a5041950c84bf5e", kill_on_drop: false }`
[INFO] [stdout] 9eeab7a1b6f3b28e0691ce991baffd6b1da6148f9c2d87656a5041950c84bf5e
[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] adce08417f67091e32611c28487883a24ba2ca47a4d29ab9cc848fd53d231b5f
[INFO] running `Command { std: "docker" "start" "-a" "adce08417f67091e32611c28487883a24ba2ca47a4d29ab9cc848fd53d231b5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]     Checking approx v0.4.0
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking simba v0.4.0
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking slog-term v2.9.1
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking nalgebra v0.26.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking slog-json v2.6.1
[INFO] [stderr]     Checking argmin v0.4.7
[INFO] [stderr]     Checking statslib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ArrayStorage`, `Matrix2`
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nalgebra::{ArrayStorage, Matrix2};
[INFO] [stdout]   |                ^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParamsLM` is never constructed
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ParamsLM {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ArrayStorage`, `Matrix2`
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nalgebra::{ArrayStorage, Matrix2};
[INFO] [stdout]   |                ^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParamsLM` is never constructed
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ParamsLM {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.92s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: argmin v0.4.7, nalgebra v0.26.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "adce08417f67091e32611c28487883a24ba2ca47a4d29ab9cc848fd53d231b5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adce08417f67091e32611c28487883a24ba2ca47a4d29ab9cc848fd53d231b5f", kill_on_drop: false }`
[INFO] [stdout] adce08417f67091e32611c28487883a24ba2ca47a4d29ab9cc848fd53d231b5f
[INFO] checking statslib-0.1.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate statslib 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate statslib 0.1.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate statslib 0.1.0
[INFO] finished tweaking crates.io crate statslib 0.1.0
[INFO] tweaked toml for crates.io crate statslib 0.1.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f794a54c236ea66aaf162abcf4387e92e2da39b323e3863875547aba3c666a8
[INFO] running `Command { std: "docker" "start" "-a" "1f794a54c236ea66aaf162abcf4387e92e2da39b323e3863875547aba3c666a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f794a54c236ea66aaf162abcf4387e92e2da39b323e3863875547aba3c666a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f794a54c236ea66aaf162abcf4387e92e2da39b323e3863875547aba3c666a8", kill_on_drop: false }`
[INFO] [stdout] 1f794a54c236ea66aaf162abcf4387e92e2da39b323e3863875547aba3c666a8
[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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35008c1daea3a5e1d894f5ed47e163f65be46929f4ea284106a7e40173d2b005
[INFO] running `Command { std: "docker" "start" "-a" "35008c1daea3a5e1d894f5ed47e163f65be46929f4ea284106a7e40173d2b005", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]     Checking approx v0.4.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking simba v0.4.0
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking slog-term v2.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking nalgebra v0.26.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking slog-json v2.6.1
[INFO] [stderr]     Checking argmin v0.4.7
[INFO] [stderr]     Checking statslib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ArrayStorage`, `Matrix2`
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nalgebra::{ArrayStorage, Matrix2};
[INFO] [stdout]   |                ^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ArrayStorage`, `Matrix2`
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nalgebra::{ArrayStorage, Matrix2};
[INFO] [stdout]   |                ^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParamsLM` is never constructed
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ParamsLM {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParamsLM` is never constructed
[INFO] [stdout]  --> src/linear_models/simple_regression.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ParamsLM {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.11s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: argmin v0.4.7, nalgebra v0.26.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "35008c1daea3a5e1d894f5ed47e163f65be46929f4ea284106a7e40173d2b005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35008c1daea3a5e1d894f5ed47e163f65be46929f4ea284106a7e40173d2b005", kill_on_drop: false }`
[INFO] [stdout] 35008c1daea3a5e1d894f5ed47e163f65be46929f4ea284106a7e40173d2b005