[INFO] fetching crate nu-plugin 0.28.0...
[INFO] checking nu-plugin-0.28.0 against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] extracting crate nu-plugin 0.28.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate nu-plugin 0.28.0 on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nu-plugin 0.28.0
[INFO] finished tweaking crates.io crate nu-plugin 0.28.0
[INFO] tweaked toml for crates.io crate nu-plugin 0.28.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51554898d3c623effa45497d40073ffea4924679c7f478ffe5444a9688cef738
[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" "51554898d3c623effa45497d40073ffea4924679c7f478ffe5444a9688cef738", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51554898d3c623effa45497d40073ffea4924679c7f478ffe5444a9688cef738", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51554898d3c623effa45497d40073ffea4924679c7f478ffe5444a9688cef738", kill_on_drop: false }`
[INFO] [stdout] 51554898d3c623effa45497d40073ffea4924679c7f478ffe5444a9688cef738
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 968c220f7dc396d382f3dbce9b2358cc8e392b7d09df7772b50f54c98ea68727
[INFO] running `Command { std: "docker" "start" "-a" "968c220f7dc396d382f3dbce9b2358cc8e392b7d09df7772b50f54c98ea68727", kill_on_drop: false }`
[INFO] [stderr]     Checking nu-test-support v0.28.0
[INFO] [stderr]     Checking nu-plugin v0.28.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/test_helpers.rs:74:25
[INFO] [stdout]    |
[INFO] [stdout] 74 | /                         format!(
[INFO] [stdout] 75 | |                             "The flag you passed ({}) is not configured in the plugin.",
[INFO] [stdout] 76 | |                             flag
[INFO] [stdout] 77 | |                         )
[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]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 74 |                         
[INFO] [stdout] 75 |                             "The flag you passed ({}) is not configured in the plugin.",
[INFO] [stdout] 76 |                             flag
[INFO] [stdout] 77 |                         
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/test_helpers.rs:146:35
[INFO] [stdout]     |
[INFO] [stdout] 146 |             Err(reason) => panic!(format!("{}", reason)),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 146 |             Err(reason) => panic!("{}", reason),
[INFO] [stdout]     |                                  --          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/test_helpers.rs:158:12
[INFO] [stdout]     |
[INFO] [stdout] 158 |       panic!(format!(
[INFO] [stdout]     |  ____________^
[INFO] [stdout] 159 | |         "Couldn't get return value from stream at {}. (There are {} items)",
[INFO] [stdout] 160 | |         at,
[INFO] [stdout] 161 | |         return_values.len() - 1
[INFO] [stdout] 162 | |     ))
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 158 |     panic!(
[INFO] [stdout] 159 |         "Couldn't get return value from stream at {}. (There are {} items)",
[INFO] [stdout] 160 |         at,
[INFO] [stdout] 161 |         return_values.len() - 1
[INFO] [stdout] 162 |     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/test_helpers.rs:74:25
[INFO] [stdout]    |
[INFO] [stdout] 74 | /                         format!(
[INFO] [stdout] 75 | |                             "The flag you passed ({}) is not configured in the plugin.",
[INFO] [stdout] 76 | |                             flag
[INFO] [stdout] 77 | |                         )
[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]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 74 |                         
[INFO] [stdout] 75 |                             "The flag you passed ({}) is not configured in the plugin.",
[INFO] [stdout] 76 |                             flag
[INFO] [stdout] 77 |                         
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/test_helpers.rs:146:35
[INFO] [stdout]     |
[INFO] [stdout] 146 |             Err(reason) => panic!(format!("{}", reason)),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 146 |             Err(reason) => panic!("{}", reason),
[INFO] [stdout]     |                                  --          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/test_helpers.rs:158:12
[INFO] [stdout]     |
[INFO] [stdout] 158 |       panic!(format!(
[INFO] [stdout]     |  ____________^
[INFO] [stdout] 159 | |         "Couldn't get return value from stream at {}. (There are {} items)",
[INFO] [stdout] 160 | |         at,
[INFO] [stdout] 161 | |         return_values.len() - 1
[INFO] [stdout] 162 | |     ))
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 158 |     panic!(
[INFO] [stdout] 159 |         "Couldn't get return value from stream at {}. (There are {} items)",
[INFO] [stdout] 160 |         at,
[INFO] [stdout] 161 |         return_values.len() - 1
[INFO] [stdout] 162 |     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "968c220f7dc396d382f3dbce9b2358cc8e392b7d09df7772b50f54c98ea68727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "968c220f7dc396d382f3dbce9b2358cc8e392b7d09df7772b50f54c98ea68727", kill_on_drop: false }`
[INFO] [stdout] 968c220f7dc396d382f3dbce9b2358cc8e392b7d09df7772b50f54c98ea68727