[INFO] fetching crate egobox-ego 0.13.0...
[INFO] checking egobox-ego-0.13.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate egobox-ego 0.13.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate egobox-ego 0.13.0 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 egobox-ego 0.13.0
[INFO] finished tweaking crates.io crate egobox-ego 0.13.0
[INFO] tweaked toml for crates.io crate egobox-ego 0.13.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate egobox-ego 0.13.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 }`
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[INFO] running `Command { std: "docker" "start" "-a" "ec22f597b9c539e5ad4d585c79d585a91c604425c4dda2b796fb2d173f579616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec22f597b9c539e5ad4d585c79d585a91c604425c4dda2b796fb2d173f579616", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 }`
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[INFO] running `Command { std: "docker" "start" "-a" "9a5d79ba15bf7a119e5c2a0eee0d154f2e1385fff3bbee48967f8bf9ff701955", kill_on_drop: false }`
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[INFO] [stderr]     Checking egobox-moe v0.13.0
[INFO] [stderr]     Checking egobox-ego v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:78
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                                              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:78
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                                              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/mixint.rs:710:9
[INFO] [stdout]     |
[INFO] [stdout] 707 |     use super::*;
[INFO] [stdout]     |         -------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 710 |     use egobox_moe::CorrelationSpec;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> examples/mopta08.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::prelude::*;
[INFO] [stdout]   |     ------------------- the item `BufRead` is already imported here
[INFO] [stdout] 7 | use std::io::{BufRead, BufReader};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 29s
[INFO] running `Command { std: "docker" "inspect" "9a5d79ba15bf7a119e5c2a0eee0d154f2e1385fff3bbee48967f8bf9ff701955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a5d79ba15bf7a119e5c2a0eee0d154f2e1385fff3bbee48967f8bf9ff701955", kill_on_drop: false }`
[INFO] [stdout] 9a5d79ba15bf7a119e5c2a0eee0d154f2e1385fff3bbee48967f8bf9ff701955
[INFO] checking egobox-ego-0.13.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate egobox-ego 0.13.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate egobox-ego 0.13.0 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 egobox-ego 0.13.0
[INFO] finished tweaking crates.io crate egobox-ego 0.13.0
[INFO] tweaked toml for crates.io crate egobox-ego 0.13.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate egobox-ego 0.13.0 already has a lockfile, it will not be regenerated
[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 }`
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[INFO] [stdout] 184e42a145a06dd3e8a518e80fdcf2c2e23e69a565c3404b7d1a86d23c389fe4
[INFO] running `Command { std: "docker" "start" "-a" "184e42a145a06dd3e8a518e80fdcf2c2e23e69a565c3404b7d1a86d23c389fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "184e42a145a06dd3e8a518e80fdcf2c2e23e69a565c3404b7d1a86d23c389fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "184e42a145a06dd3e8a518e80fdcf2c2e23e69a565c3404b7d1a86d23c389fe4", kill_on_drop: false }`
[INFO] [stdout] 184e42a145a06dd3e8a518e80fdcf2c2e23e69a565c3404b7d1a86d23c389fe4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8269da58f3a12501408290c41c3041f55e308b96be8a891cfc44047aface673b
[INFO] running `Command { std: "docker" "start" "-a" "8269da58f3a12501408290c41c3041f55e308b96be8a891cfc44047aface673b", kill_on_drop: false }`
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[INFO] [stderr]     Checking egobox-ego v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:78
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                                              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]  --> src/egor_config.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::types::*;
[INFO] [stdout]   |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] 4 | use egobox_moe::{CorrelationSpec, RegressionSpec};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RegressionSpec` is imported redundantly
[INFO] [stdout]    --> src/egor_solver.rs:118:78
[INFO] [stdout]     |
[INFO] [stdout] 114 | use crate::types::*;
[INFO] [stdout]     |     --------------- the item `RegressionSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 | use egobox_moe::{ClusteredSurrogate, Clustering, CorrelationSpec, MoeParams, RegressionSpec};
[INFO] [stdout]     |                                                                              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CorrelationSpec` is imported redundantly
[INFO] [stdout]    --> src/mixint.rs:710:9
[INFO] [stdout]     |
[INFO] [stdout] 707 |     use super::*;
[INFO] [stdout]     |         -------- the item `CorrelationSpec` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 710 |     use egobox_moe::CorrelationSpec;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> examples/mopta08.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::prelude::*;
[INFO] [stdout]   |     ------------------- the item `BufRead` is already imported here
[INFO] [stdout] 7 | use std::io::{BufRead, BufReader};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] running `Command { std: "docker" "inspect" "8269da58f3a12501408290c41c3041f55e308b96be8a891cfc44047aface673b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8269da58f3a12501408290c41c3041f55e308b96be8a891cfc44047aface673b", kill_on_drop: false }`
[INFO] [stdout] 8269da58f3a12501408290c41c3041f55e308b96be8a891cfc44047aface673b