[INFO] fetching crate enqueue-email 0.1.0...
[INFO] checking enqueue-email-0.1.0 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate enqueue-email 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate enqueue-email 0.1.0 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate enqueue-email 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate enqueue-email 0.1.0
[INFO] tweaked toml for crates.io crate enqueue-email 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate enqueue-email 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8bf8c9044a829227aa186c4e9160bf4dab96c0d25a4ae63d2ea19c6839bbd2ea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8bf8c9044a829227aa186c4e9160bf4dab96c0d25a4ae63d2ea19c6839bbd2ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bf8c9044a829227aa186c4e9160bf4dab96c0d25a4ae63d2ea19c6839bbd2ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bf8c9044a829227aa186c4e9160bf4dab96c0d25a4ae63d2ea19c6839bbd2ea", kill_on_drop: false }`
[INFO] [stdout] 8bf8c9044a829227aa186c4e9160bf4dab96c0d25a4ae63d2ea19c6839bbd2ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a2a86c297c0c232e3a4f26e88b328d749d00fef159f37d63191bc3796bcfcce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7a2a86c297c0c232e3a4f26e88b328d749d00fef159f37d63191bc3796bcfcce", kill_on_drop: false }`
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[INFO] [stderr]     Checking futures v0.3.5
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[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]    Compiling cargo-tarpaulin v0.14.1
[INFO] [stderr]     Checking cargo_metadata v0.10.0
[INFO] [stderr]     Checking coveralls-api v0.5.0
[INFO] [stderr]     Checking addr2line v0.12.2
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[INFO] [stderr]     Checking serde_qs v0.6.1
[INFO] [stderr]     Checking http-types v2.2.1
[INFO] [stderr]     Checking enqueue-email v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     panic!(e.to_string());
[INFO] [stdout]    |                            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     panic!("{}", e.to_string());
[INFO] [stdout]    |                            ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 66 |                     std::panic::panic_any(e.to_string());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:103:26
[INFO] [stdout]     |
[INFO] [stdout] 103 |           Err(_) => panic!(format!(
[INFO] [stdout]     |  __________________________^
[INFO] [stdout] 104 | |             "missing ENV configuration: {}",
[INFO] [stdout] 105 | |             KEY_ENQUEUE_MAIL_FROM
[INFO] [stdout] 106 | |         )),
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:111:26
[INFO] [stdout]     |
[INFO] [stdout] 111 |           Err(_) => panic!(format!(
[INFO] [stdout]     |  __________________________^
[INFO] [stdout] 112 | |             "missing ENV configuration: {}",
[INFO] [stdout] 113 | |             KEY_ENQUEUE_MAIL_TO
[INFO] [stdout] 114 | |         )),
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:119:26
[INFO] [stdout]     |
[INFO] [stdout] 119 |           Err(_) => panic!(format!(
[INFO] [stdout]     |  __________________________^
[INFO] [stdout] 120 | |             "missing ENV configuration: {}",
[INFO] [stdout] 121 | |             KEY_ENQUEUE_MAIL_CC
[INFO] [stdout] 122 | |         )),
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:127:26
[INFO] [stdout]     |
[INFO] [stdout] 127 |           Err(_) => panic!(format!(
[INFO] [stdout]     |  __________________________^
[INFO] [stdout] 128 | |             "missing ENV configuration: {}",
[INFO] [stdout] 129 | |             KEY_ENQUEUE_MAIL_FCC
[INFO] [stdout] 130 | |         )),
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:136:26
[INFO] [stdout]     |
[INFO] [stdout] 136 |           Err(_) => panic!(format!(
[INFO] [stdout]     |  __________________________^
[INFO] [stdout] 137 | |             "missing ENV configuration: {}",
[INFO] [stdout] 138 | |             KEY_ENQUEUE_MAIL_ACCOUNT
[INFO] [stdout] 139 | |         )),
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 26s
[INFO] running `Command { std: "docker" "inspect" "7a2a86c297c0c232e3a4f26e88b328d749d00fef159f37d63191bc3796bcfcce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a2a86c297c0c232e3a4f26e88b328d749d00fef159f37d63191bc3796bcfcce", kill_on_drop: false }`
[INFO] [stdout] 7a2a86c297c0c232e3a4f26e88b328d749d00fef159f37d63191bc3796bcfcce