[INFO] fetching crate msn-kit 0.2.5...
[INFO] checking msn-kit-0.2.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate msn-kit 0.2.5 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate msn-kit 0.2.5 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 msn-kit 0.2.5
[INFO] finished tweaking crates.io crate msn-kit 0.2.5
[INFO] tweaked toml for crates.io crate msn-kit 0.2.5 written to /workspace/builds/worker-3-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]      Locking 24 packages
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding proc-macro-hack v0.4.3 (latest: v0.5.20+deprecated)
[INFO] [stderr]       Adding quick-xml v0.22.0 (latest: v0.31.0)
[INFO] [stderr]       Adding quote v0.3.15 (latest: v1.0.35)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-hack-impl v0.4.3
[INFO] [stderr]   Downloaded structure-macro-impl v0.1.2
[INFO] [stderr]   Downloaded structure v0.1.2
[INFO] [stderr]   Downloaded proc-macro-hack v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 82217319722f6a4378c416f8d05e78a126d43794c3f8b310d86ab1eb98feef9f
[INFO] running `Command { std: "docker" "start" "-a" "82217319722f6a4378c416f8d05e78a126d43794c3f8b310d86ab1eb98feef9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82217319722f6a4378c416f8d05e78a126d43794c3f8b310d86ab1eb98feef9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82217319722f6a4378c416f8d05e78a126d43794c3f8b310d86ab1eb98feef9f", kill_on_drop: false }`
[INFO] [stdout] 82217319722f6a4378c416f8d05e78a126d43794c3f8b310d86ab1eb98feef9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0d903b80854752c4ef09369a40a5850a84393652dbbbf09d3f515fdc53bf1835
[INFO] running `Command { std: "docker" "start" "-a" "0d903b80854752c4ef09369a40a5850a84393652dbbbf09d3f515fdc53bf1835", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.3
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling proc-macro-hack v0.4.3
[INFO] [stderr]    Compiling structure-macro-impl v0.1.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking structure v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking quick-xml v0.22.0
[INFO] [stderr]     Checking msn-kit v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `quick_xml` is imported redundantly
[INFO] [stdout]  --> src/io/mzml_parser/parser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use quick_xml;
[INFO] [stdout]   |     ^^^^^^^^^ the item `quick_xml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::io::Format`
[INFO] [stdout]   --> src/io/mod.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     use crate::io::Format;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> src/io/mod.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     use std::str::FromStr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Binary` is imported redundantly
[INFO] [stdout]   --> src/io/mzml_parser/binary_conversion.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use super::*;
[INFO] [stdout]    |         -------- the item `Binary` is already imported here
[INFO] [stdout] 71 |
[INFO] [stdout] 72 |     use crate::io::mzml_parser::types::Binary;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DataType` is imported redundantly
[INFO] [stdout]   --> src/io/mzml_parser/binary_conversion.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use super::*;
[INFO] [stdout]    |         -------- the item `DataType` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 73 |     use crate::io::mzml_parser::types::DataType;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CVVectorMethods` is never used
[INFO] [stdout]    --> src/io/mzml_parser/types.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 | trait CVVectorMethods {}
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CVVectorMethods` is never used
[INFO] [stdout]    --> src/io/mzml_parser/types.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 | trait CVVectorMethods {}
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.82s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "0d903b80854752c4ef09369a40a5850a84393652dbbbf09d3f515fdc53bf1835", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d903b80854752c4ef09369a40a5850a84393652dbbbf09d3f515fdc53bf1835", kill_on_drop: false }`
[INFO] [stdout] 0d903b80854752c4ef09369a40a5850a84393652dbbbf09d3f515fdc53bf1835
[INFO] checking msn-kit-0.2.5 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate msn-kit 0.2.5 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate msn-kit 0.2.5 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 msn-kit 0.2.5
[INFO] finished tweaking crates.io crate msn-kit 0.2.5
[INFO] tweaked toml for crates.io crate msn-kit 0.2.5 written to /workspace/builds/worker-3-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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b7dc657e5e318f598e0e5589fc9a39748222a7c04150bbd0ced885d2ade3a31d
[INFO] running `Command { std: "docker" "start" "-a" "b7dc657e5e318f598e0e5589fc9a39748222a7c04150bbd0ced885d2ade3a31d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7dc657e5e318f598e0e5589fc9a39748222a7c04150bbd0ced885d2ade3a31d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7dc657e5e318f598e0e5589fc9a39748222a7c04150bbd0ced885d2ade3a31d", kill_on_drop: false }`
[INFO] [stdout] b7dc657e5e318f598e0e5589fc9a39748222a7c04150bbd0ced885d2ade3a31d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ca41f9f14f3940df5b8eb24e668ab0f42cb8e071a20ac4adf6d928f6740fa612
[INFO] running `Command { std: "docker" "start" "-a" "ca41f9f14f3940df5b8eb24e668ab0f42cb8e071a20ac4adf6d928f6740fa612", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.3
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling proc-macro-hack v0.4.3
[INFO] [stderr]    Compiling structure-macro-impl v0.1.2
[INFO] [stderr]     Checking structure v0.1.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking quick-xml v0.22.0
[INFO] [stderr]     Checking msn-kit v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Binary` is imported redundantly
[INFO] [stdout]   --> src/io/mzml_parser/binary_conversion.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use super::*;
[INFO] [stdout]    |         -------- the item `Binary` is already imported here
[INFO] [stdout] 71 |
[INFO] [stdout] 72 |     use crate::io::mzml_parser::types::Binary;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DataType` is imported redundantly
[INFO] [stdout]   --> src/io/mzml_parser/binary_conversion.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use super::*;
[INFO] [stdout]    |         -------- the item `DataType` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 73 |     use crate::io::mzml_parser::types::DataType;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `quick_xml` is imported redundantly
[INFO] [stdout]  --> src/io/mzml_parser/parser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use quick_xml;
[INFO] [stdout]   |     ^^^^^^^^^ the item `quick_xml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::io::Format`
[INFO] [stdout]   --> src/io/mod.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     use crate::io::Format;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> src/io/mod.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     use std::str::FromStr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CVVectorMethods` is never used
[INFO] [stdout]    --> src/io/mzml_parser/types.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 | trait CVVectorMethods {}
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CVVectorMethods` is never used
[INFO] [stdout]    --> src/io/mzml_parser/types.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 | trait CVVectorMethods {}
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.84s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "ca41f9f14f3940df5b8eb24e668ab0f42cb8e071a20ac4adf6d928f6740fa612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca41f9f14f3940df5b8eb24e668ab0f42cb8e071a20ac4adf6d928f6740fa612", kill_on_drop: false }`
[INFO] [stdout] ca41f9f14f3940df5b8eb24e668ab0f42cb8e071a20ac4adf6d928f6740fa612