[INFO] fetching crate ipr 0.1.2...
[INFO] checking ipr-0.1.2 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate ipr 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate ipr 0.1.2 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ipr 0.1.2
[INFO] finished tweaking crates.io crate ipr 0.1.2
[INFO] tweaked toml for crates.io crate ipr 0.1.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86eaf3bfb76fe6b2377551c48aa7ed24e5e7079c8cd41787c7d4d4f37b4eab50
[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" "86eaf3bfb76fe6b2377551c48aa7ed24e5e7079c8cd41787c7d4d4f37b4eab50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86eaf3bfb76fe6b2377551c48aa7ed24e5e7079c8cd41787c7d4d4f37b4eab50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86eaf3bfb76fe6b2377551c48aa7ed24e5e7079c8cd41787c7d4d4f37b4eab50", kill_on_drop: false }`
[INFO] [stdout] 86eaf3bfb76fe6b2377551c48aa7ed24e5e7079c8cd41787c7d4d4f37b4eab50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 676b89e229295f2a6fe2f30d0c363bd22d8b8eefa1791cab272ab106c0bbb3ff
[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" "676b89e229295f2a6fe2f30d0c363bd22d8b8eefa1791cab272ab106c0bbb3ff", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking ipr v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/ip.rs:99:10
[INFO] [stdout]    |
[INFO] [stdout] 99 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> tests/ip.rs:137:10
[INFO] [stdout]     |
[INFO] [stdout] 137 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/ip.rs:18:34
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 Err(e) => panic!(e),
[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] 18 |                 Err(e) => panic!("{}", e),
[INFO] [stdout]    |                                  ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/ip.rs:79:34
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 Err(e) => panic!(e),
[INFO] [stdout]    |                                  ^
[INFO] [stdout]    |
[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] 79 |                 Err(e) => panic!("{}", e),
[INFO] [stdout]    |                                  ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/ip.rs:127:34
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 Err(e) => panic!(e),
[INFO] [stdout]     |                                  ^
[INFO] [stdout]     |
[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] 127 |                 Err(e) => panic!("{}", e),
[INFO] [stdout]     |                                  ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 Err(e) => std::panic::panic_any(e),
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/ip.rs:164:34
[INFO] [stdout]     |
[INFO] [stdout] 164 |                 Err(e) => panic!(e),
[INFO] [stdout]     |                                  ^
[INFO] [stdout]     |
[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] 164 |                 Err(e) => panic!("{}", e),
[INFO] [stdout]     |                                  ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 164 |                 Err(e) => std::panic::panic_any(e),
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/ip.rs:212:34
[INFO] [stdout]     |
[INFO] [stdout] 212 |                 Err(e) => panic!(e),
[INFO] [stdout]     |                                  ^
[INFO] [stdout]     |
[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] 212 |                 Err(e) => panic!("{}", e),
[INFO] [stdout]     |                                  ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 212 |                 Err(e) => std::panic::panic_any(e),
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "676b89e229295f2a6fe2f30d0c363bd22d8b8eefa1791cab272ab106c0bbb3ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "676b89e229295f2a6fe2f30d0c363bd22d8b8eefa1791cab272ab106c0bbb3ff", kill_on_drop: false }`
[INFO] [stdout] 676b89e229295f2a6fe2f30d0c363bd22d8b8eefa1791cab272ab106c0bbb3ff