[INFO] fetching crate enumflags_derive 0.4.1...
[INFO] checking enumflags_derive-0.4.1 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate enumflags_derive 0.4.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate enumflags_derive 0.4.1 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate enumflags_derive 0.4.1
[INFO] finished tweaking crates.io crate enumflags_derive 0.4.1
[INFO] tweaked toml for crates.io crate enumflags_derive 0.4.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "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" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "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] c532b6e2e948132170821a57aedd43ca6d2303798e72636a3351753307e5017b
[INFO] running `Command { std: "docker" "start" "-a" "c532b6e2e948132170821a57aedd43ca6d2303798e72636a3351753307e5017b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c532b6e2e948132170821a57aedd43ca6d2303798e72636a3351753307e5017b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c532b6e2e948132170821a57aedd43ca6d2303798e72636a3351753307e5017b", kill_on_drop: false }`
[INFO] [stdout] c532b6e2e948132170821a57aedd43ca6d2303798e72636a3351753307e5017b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "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] 7b05a9edef50115e7a150b4cfe065eb7a0868acfd41d31e0fe2fa351a55840ec
[INFO] running `Command { std: "docker" "start" "-a" "7b05a9edef50115e7a150b4cfe065eb7a0868acfd41d31e0fe2fa351a55840ec", kill_on_drop: false }`
[INFO] [stderr]     Checking proc-macro2 v0.2.3
[INFO] [stderr]     Checking quote v0.4.2
[INFO] [stderr]     Checking syn v0.12.15
[INFO] [stderr]     Checking enumflags_derive v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 | /         format!(
[INFO] [stdout] 108 | |             "Value '0b{val:b}' is too big for an {ty}",
[INFO] [stdout] 109 | |             val = max_flag_value,
[INFO] [stdout] 110 | |             ty = ty
[INFO] [stdout] 111 | |         )
[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] 107 |         
[INFO] [stdout] 108 |             "Value '0b{val:b}' is too big for an {ty}",
[INFO] [stdout] 109 |             val = max_flag_value,
[INFO] [stdout] 110 |             ty = ty
[INFO] [stdout] 111 |         
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 | /         format!(
[INFO] [stdout] 108 | |             "Value '0b{val:b}' is too big for an {ty}",
[INFO] [stdout] 109 | |             val = max_flag_value,
[INFO] [stdout] 110 | |             ty = ty
[INFO] [stdout] 111 | |         )
[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] 107 |         
[INFO] [stdout] 108 |             "Value '0b{val:b}' is too big for an {ty}",
[INFO] [stdout] 109 |             val = max_flag_value,
[INFO] [stdout] 110 |             ty = ty
[INFO] [stdout] 111 |         
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 | /         format!(
[INFO] [stdout] 144 | |             "The following flags are not unique: {data:?}",
[INFO] [stdout] 145 | |             data = wrong_flag_values
[INFO] [stdout] 146 | |         )
[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] 143 |         
[INFO] [stdout] 144 |             "The following flags are not unique: {data:?}",
[INFO] [stdout] 145 |             data = wrong_flag_values
[INFO] [stdout] 146 |         
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 | /         format!(
[INFO] [stdout] 144 | |             "The following flags are not unique: {data:?}",
[INFO] [stdout] 145 | |             data = wrong_flag_values
[INFO] [stdout] 146 | |         )
[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] 143 |         
[INFO] [stdout] 144 |             "The following flags are not unique: {data:?}",
[INFO] [stdout] 145 |             data = wrong_flag_values
[INFO] [stdout] 146 |         
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.48s
[INFO] running `Command { std: "docker" "inspect" "7b05a9edef50115e7a150b4cfe065eb7a0868acfd41d31e0fe2fa351a55840ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b05a9edef50115e7a150b4cfe065eb7a0868acfd41d31e0fe2fa351a55840ec", kill_on_drop: false }`
[INFO] [stdout] 7b05a9edef50115e7a150b4cfe065eb7a0868acfd41d31e0fe2fa351a55840ec