[INFO] fetching crate cargo-set-rust-version 0.5.0...
[INFO] checking cargo-set-rust-version-0.5.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cargo-set-rust-version 0.5.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate cargo-set-rust-version 0.5.0
[INFO] finished tweaking crates.io crate cargo-set-rust-version 0.5.0
[INFO] tweaked toml for crates.io crate cargo-set-rust-version 0.5.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-set-rust-version 0.5.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cargo-set-rust-version 0.5.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41768eab937c9c9908f81e8e11e8c8590844635f9228ed2a761955ccd8bbef8c
[INFO] running `Command { std: "docker" "start" "-a" "41768eab937c9c9908f81e8e11e8c8590844635f9228ed2a761955ccd8bbef8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41768eab937c9c9908f81e8e11e8c8590844635f9228ed2a761955ccd8bbef8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41768eab937c9c9908f81e8e11e8c8590844635f9228ed2a761955ccd8bbef8c", kill_on_drop: false }`
[INFO] [stdout] 41768eab937c9c9908f81e8e11e8c8590844635f9228ed2a761955ccd8bbef8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd3db77282c2abae81cec3ffe104ff2521f2aabfa6ac41a098b08d3db8c0a1b7
[INFO] running `Command { std: "docker" "start" "-a" "cd3db77282c2abae81cec3ffe104ff2521f2aabfa6ac41a098b08d3db8c0a1b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.129
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking os_str_bytes v6.2.0
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]    Compiling clap_derive v3.2.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking assert_cmd v2.0.4
[INFO] [stderr]     Checking clap v3.2.16
[INFO] [stderr]     Checking globset v0.4.9
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking globwalk v0.8.1
[INFO] [stderr]     Checking assert_fs v1.0.7
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.22.4
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking ureq v2.5.0
[INFO] [stderr]     Checking toml_edit v0.14.4
[INFO] [stderr]     Checking cargo-set-rust-version v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     channel: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     channel: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-set-rust-version` (bin "cargo-set-rust-version" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `cargo-set-rust-version` (bin "cargo-set-rust-version") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "cd3db77282c2abae81cec3ffe104ff2521f2aabfa6ac41a098b08d3db8c0a1b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd3db77282c2abae81cec3ffe104ff2521f2aabfa6ac41a098b08d3db8c0a1b7", kill_on_drop: false }`
[INFO] [stdout] cd3db77282c2abae81cec3ffe104ff2521f2aabfa6ac41a098b08d3db8c0a1b7