[INFO] fetching crate serde_int_map_derive 0.1.2...
[INFO] checking serde_int_map_derive-0.1.2 against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] extracting crate serde_int_map_derive 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate serde_int_map_derive 0.1.2 on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_int_map_derive 0.1.2
[INFO] finished tweaking crates.io crate serde_int_map_derive 0.1.2
[INFO] tweaked toml for crates.io crate serde_int_map_derive 0.1.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "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] 3fcfa3e3836dd5b2e1bbbd69503f203fe0d8f6dd73b049e65b0f04284d433c96
[INFO] running `Command { std: "docker" "start" "-a" "3fcfa3e3836dd5b2e1bbbd69503f203fe0d8f6dd73b049e65b0f04284d433c96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fcfa3e3836dd5b2e1bbbd69503f203fe0d8f6dd73b049e65b0f04284d433c96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fcfa3e3836dd5b2e1bbbd69503f203fe0d8f6dd73b049e65b0f04284d433c96", kill_on_drop: false }`
[INFO] [stdout] 3fcfa3e3836dd5b2e1bbbd69503f203fe0d8f6dd73b049e65b0f04284d433c96
[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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a879b28942911ef66ddc585abd27899b21a1c3ded3365ae686d0f49c120fd7c
[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" "9a879b28942911ef66ddc585abd27899b21a1c3ded3365ae686d0f49c120fd7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking serde_int_map v0.1.2
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking syn v1.0.64
[INFO] [stderr]     Checking serde_int_map_derive v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 17 | |             "No int_map_id or int_map_unknown found on field {}",
[INFO] [stdout] 18 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 19 | |         ));
[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] 16 |         panic!(
[INFO] [stdout] 17 |             "No int_map_id or int_map_unknown found on field {}",
[INFO] [stdout] 18 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 19 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 23 | |             "Multiple int_map_id or int_map_unknown attributes found on field {}",
[INFO] [stdout] 24 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 25 | |         ));
[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] 22 |         panic!(
[INFO] [stdout] 23 |             "Multiple int_map_id or int_map_unknown attributes found on field {}",
[INFO] [stdout] 24 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 25 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 17 | |             "No int_map_id or int_map_unknown found on field {}",
[INFO] [stdout] 18 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 19 | |         ));
[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] 16 |         panic!(
[INFO] [stdout] 17 |             "No int_map_id or int_map_unknown found on field {}",
[INFO] [stdout] 18 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 19 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |           panic!(format!(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 23 | |             "Multiple int_map_id or int_map_unknown attributes found on field {}",
[INFO] [stdout] 24 | |             field.ident.as_ref().unwrap()
[INFO] [stdout] 25 | |         ));
[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] 22 |         panic!(
[INFO] [stdout] 23 |             "Multiple int_map_id or int_map_unknown attributes found on field {}",
[INFO] [stdout] 24 |             field.ident.as_ref().unwrap()
[INFO] [stdout] 25 |         );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:65:25
[INFO] [stdout]    |
[INFO] [stdout] 65 |               _ => panic!(format!(
[INFO] [stdout]    |  _________________________^
[INFO] [stdout] 66 | |                 "Non-literal int_map_id value for field {}: {}",
[INFO] [stdout] 67 | |                 field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 68 | |                 token.to_string()
[INFO] [stdout] 69 | |             )),
[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] 65 |             _ => panic!(
[INFO] [stdout] 66 |                 "Non-literal int_map_id value for field {}: {}",
[INFO] [stdout] 67 |                 field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 68 |                 token.to_string()
[INFO] [stdout] 69 |             ),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/parser_helper.rs:65:25
[INFO] [stdout]    |
[INFO] [stdout] 65 |               _ => panic!(format!(
[INFO] [stdout]    |  _________________________^
[INFO] [stdout] 66 | |                 "Non-literal int_map_id value for field {}: {}",
[INFO] [stdout] 67 | |                 field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 68 | |                 token.to_string()
[INFO] [stdout] 69 | |             )),
[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] 65 |             _ => panic!(
[INFO] [stdout] 66 |                 "Non-literal int_map_id value for field {}: {}",
[INFO] [stdout] 67 |                 field.ident.as_ref().unwrap().to_string(),
[INFO] [stdout] 68 |                 token.to_string()
[INFO] [stdout] 69 |             ),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.00s
[INFO] running `Command { std: "docker" "inspect" "9a879b28942911ef66ddc585abd27899b21a1c3ded3365ae686d0f49c120fd7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a879b28942911ef66ddc585abd27899b21a1c3ded3365ae686d0f49c120fd7c", kill_on_drop: false }`
[INFO] [stdout] 9a879b28942911ef66ddc585abd27899b21a1c3ded3365ae686d0f49c120fd7c