[INFO] fetching crate letterman 0.2.7...
[INFO] checking letterman-0.2.7 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate letterman 0.2.7 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate letterman 0.2.7 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate letterman 0.2.7
[INFO] finished tweaking crates.io crate letterman 0.2.7
[INFO] tweaked toml for crates.io crate letterman 0.2.7 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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 208 packages to latest compatible versions
[INFO] [stderr]       Adding base64 v0.13.1 (available: v0.22.1)
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[INFO] [stderr]       Adding flume v0.10.14 (available: v0.11.0)
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[INFO] [stderr]       Adding ipconfig v0.2.2 (available: v0.3.2)
[INFO] [stderr]       Adding linux-raw-sys v0.4.14 (available: v0.6.5)
[INFO] [stderr]       Adding parking_lot v0.11.2 (available: v0.12.3)
[INFO] [stderr]       Adding parking_lot_core v0.8.6 (available: v0.9.10)
[INFO] [stderr]       Adding quick-error v1.2.3 (available: v2.0.1)
[INFO] [stderr]       Adding quoted_printable v0.4.8 (available: v0.5.1)
[INFO] [stderr]       Adding redox_syscall v0.2.16 (available: v0.5.6)
[INFO] [stderr]       Adding ring v0.16.20 (available: v0.17.8)
[INFO] [stderr]       Adding rustls v0.20.9 (available: v0.23.13)
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[INFO] [stderr]       Adding security-framework v2.11.1 (available: v3.0.0)
[INFO] [stderr]       Adding socket2 v0.3.19 (available: v0.5.7)
[INFO] [stderr]       Adding socket2 v0.4.10 (available: v0.5.7)
[INFO] [stderr]       Adding spin v0.5.2 (available: v0.9.8)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.79)
[INFO] [stderr]       Adding tokio-rustls v0.23.4 (available: v0.26.0)
[INFO] [stderr]       Adding trust-dns-proto v0.20.4 (available: v0.23.2)
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[INFO] [stderr]       Adding trust-dns-resolver v0.20.4 (available: v0.23.2)
[INFO] [stderr]       Adding trust-dns-resolver v0.21.2 (available: v0.23.2)
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[INFO] [stderr]       Adding windows-core v0.52.0 (available: v0.58.0)
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[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (available: v0.52.6)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (available: v0.52.6)
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[INFO] [stderr]       Adding winreg v0.6.2 (available: v0.52.0)
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b526f1c38e4b17a9cdcd1dcbdce0e31abf8020ce01f79244b0180de09f1a48e9
[INFO] running `Command { std: "docker" "start" "-a" "b526f1c38e4b17a9cdcd1dcbdce0e31abf8020ce01f79244b0180de09f1a48e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b526f1c38e4b17a9cdcd1dcbdce0e31abf8020ce01f79244b0180de09f1a48e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b526f1c38e4b17a9cdcd1dcbdce0e31abf8020ce01f79244b0180de09f1a48e9", kill_on_drop: false }`
[INFO] [stdout] b526f1c38e4b17a9cdcd1dcbdce0e31abf8020ce01f79244b0180de09f1a48e9
[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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58b1425765f12296a70829786083803aa8ec2af644a3c040d400c776bbfa274d
[INFO] running `Command { std: "docker" "start" "-a" "58b1425765f12296a70829786083803aa8ec2af644a3c040d400c776bbfa274d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking data-encoding v2.6.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]     Checking url v2.5.2
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking instant v0.1.13
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking thiserror v1.0.64
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
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[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking parking_lot_core v0.9.10
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[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]     Checking nanorand v0.7.0
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[INFO] [stderr]     Checking letterman_email_body_parser v1.0.5
[INFO] [stderr]     Checking letterman v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> src/common.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         format!("!!! {:?}",v);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> src/common.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         format!("!!! {:?}",v);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning 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 44.09s
[INFO] running `Command { std: "docker" "inspect" "58b1425765f12296a70829786083803aa8ec2af644a3c040d400c776bbfa274d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58b1425765f12296a70829786083803aa8ec2af644a3c040d400c776bbfa274d", kill_on_drop: false }`
[INFO] [stdout] 58b1425765f12296a70829786083803aa8ec2af644a3c040d400c776bbfa274d