[INFO] fetching crate serde_int_map_derive 0.1.2...
[INFO] checking serde_int_map_derive-0.1.2 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate serde_int_map_derive 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate serde_int_map_derive 0.1.2 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4c8552aafcfffde9228ccad0733966e773a9d6b8e2c2a745e0bdfcf47315092
[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" "f4c8552aafcfffde9228ccad0733966e773a9d6b8e2c2a745e0bdfcf47315092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4c8552aafcfffde9228ccad0733966e773a9d6b8e2c2a745e0bdfcf47315092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4c8552aafcfffde9228ccad0733966e773a9d6b8e2c2a745e0bdfcf47315092", kill_on_drop: false }`
[INFO] [stdout] f4c8552aafcfffde9228ccad0733966e773a9d6b8e2c2a745e0bdfcf47315092
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 354e6f368b29e3a60a0daf57227bbd2ee18482eb0dbbb7a5096c15261e0357c9
[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" "354e6f368b29e3a60a0daf57227bbd2ee18482eb0dbbb7a5096c15261e0357c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking serde_int_map v0.1.2
[INFO] [stderr]     Checking quote v1.0.8
[INFO] [stderr]     Checking syn v1.0.60
[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: 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/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: 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/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: 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/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: 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/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: 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/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: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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 4.85s
[INFO] running `Command { std: "docker" "inspect" "354e6f368b29e3a60a0daf57227bbd2ee18482eb0dbbb7a5096c15261e0357c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "354e6f368b29e3a60a0daf57227bbd2ee18482eb0dbbb7a5096c15261e0357c9", kill_on_drop: false }`
[INFO] [stdout] 354e6f368b29e3a60a0daf57227bbd2ee18482eb0dbbb7a5096c15261e0357c9