[INFO] fetching crate serde_int_map_derive 0.3.0...
[INFO] checking serde_int_map_derive-0.3.0 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate serde_int_map_derive 0.3.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate serde_int_map_derive 0.3.0 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_int_map_derive 0.3.0
[INFO] finished tweaking crates.io crate serde_int_map_derive 0.3.0
[INFO] tweaked toml for crates.io crate serde_int_map_derive 0.3.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "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" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", 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] ef2f1d482b10969296b6f769a9a52a27bec48194c9819d17e5849e7d1adb58ef
[INFO] running `Command { std: "docker" "start" "-a" "ef2f1d482b10969296b6f769a9a52a27bec48194c9819d17e5849e7d1adb58ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef2f1d482b10969296b6f769a9a52a27bec48194c9819d17e5849e7d1adb58ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef2f1d482b10969296b6f769a9a52a27bec48194c9819d17e5849e7d1adb58ef", kill_on_drop: false }`
[INFO] [stdout] ef2f1d482b10969296b6f769a9a52a27bec48194c9819d17e5849e7d1adb58ef
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5a59e2f9d96f834056e3b16c7092c570152ce1cfcfa289a04d8e5e4e4c22e1c
[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" "b5a59e2f9d96f834056e3b16c7092c570152ce1cfcfa289a04d8e5e4e4c22e1c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking serde_int_map_traits v0.3.0
[INFO] [stderr]     Checking proc-macro2 v1.0.27
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking serde_int_map_derive v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 19 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 20 | |             "No int_map_* found on field {}",
[INFO] [stdout] 21 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 22 | |         ));
[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] 19 |         panic!(
[INFO] [stdout] 20 |             "No int_map_* found on field {}",
[INFO] [stdout] 21 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 22 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 26 | |             "Multiple int_map_* attributes found on field {}",
[INFO] [stdout] 27 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 28 | |         ));
[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] 25 |         panic!(
[INFO] [stdout] 26 |             "Multiple int_map_* attributes found on field {}",
[INFO] [stdout] 27 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 28 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:81:29
[INFO] [stdout]    |
[INFO] [stdout] 81 |                   _ => panic!(format!(
[INFO] [stdout]    |  _____________________________^
[INFO] [stdout] 82 | |                     "Non-literal int_map_id value for field {}: {}, value: {:?}",
[INFO] [stdout] 83 | |                     field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 84 | |                     token.to_string(),
[INFO] [stdout] 85 | |                     token
[INFO] [stdout] 86 | |                 )),
[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] 81 |                 _ => panic!(
[INFO] [stdout] 82 |                     "Non-literal int_map_id value for field {}: {}, value: {:?}",
[INFO] [stdout] 83 |                     field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 84 |                     token.to_string(),
[INFO] [stdout] 85 |                     token
[INFO] [stdout] 86 |                 ),
[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/parser_helper.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 19 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 20 | |             "No int_map_* found on field {}",
[INFO] [stdout] 21 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 22 | |         ));
[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] 19 |         panic!(
[INFO] [stdout] 20 |             "No int_map_* found on field {}",
[INFO] [stdout] 21 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 22 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 26 | |             "Multiple int_map_* attributes found on field {}",
[INFO] [stdout] 27 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 28 | |         ));
[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] 25 |         panic!(
[INFO] [stdout] 26 |             "Multiple int_map_* attributes found on field {}",
[INFO] [stdout] 27 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 28 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:81:29
[INFO] [stdout]    |
[INFO] [stdout] 81 |                   _ => panic!(format!(
[INFO] [stdout]    |  _____________________________^
[INFO] [stdout] 82 | |                     "Non-literal int_map_id value for field {}: {}, value: {:?}",
[INFO] [stdout] 83 | |                     field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 84 | |                     token.to_string(),
[INFO] [stdout] 85 | |                     token
[INFO] [stdout] 86 | |                 )),
[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] 81 |                 _ => panic!(
[INFO] [stdout] 82 |                     "Non-literal int_map_id value for field {}: {}, value: {:?}",
[INFO] [stdout] 83 |                     field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 84 |                     token.to_string(),
[INFO] [stdout] 85 |                     token
[INFO] [stdout] 86 |                 ),
[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 3.88s
[INFO] running `Command { std: "docker" "inspect" "b5a59e2f9d96f834056e3b16c7092c570152ce1cfcfa289a04d8e5e4e4c22e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5a59e2f9d96f834056e3b16c7092c570152ce1cfcfa289a04d8e5e4e4c22e1c", kill_on_drop: false }`
[INFO] [stdout] b5a59e2f9d96f834056e3b16c7092c570152ce1cfcfa289a04d8e5e4e4c22e1c