[INFO] fetching crate fast_paths 0.2.0...
[INFO] checking fast_paths-0.2.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate fast_paths 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate fast_paths 0.2.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fast_paths 0.2.0
[INFO] finished tweaking crates.io crate fast_paths 0.2.0
[INFO] tweaked toml for crates.io crate fast_paths 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 665f37498bac1b59ec82d00027734e47cfdd83325b14650f0c37390adf20a2f2
[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" "665f37498bac1b59ec82d00027734e47cfdd83325b14650f0c37390adf20a2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "665f37498bac1b59ec82d00027734e47cfdd83325b14650f0c37390adf20a2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "665f37498bac1b59ec82d00027734e47cfdd83325b14650f0c37390adf20a2f2", kill_on_drop: false }`
[INFO] [stdout] 665f37498bac1b59ec82d00027734e47cfdd83325b14650f0c37390adf20a2f2
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] 82b6233c5d460856038ab6d269b728c6fa9778ee994b2017bcee144f029dfd9b
[INFO] running `Command { std: "docker" "start" "-a" "82b6233c5d460856038ab6d269b728c6fa9778ee994b2017bcee144f029dfd9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling priority-queue v1.1.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking stopwatch v0.0.7
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking fast_paths v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/preparation_graph.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 | /             format!(
[INFO] [stdout] 151 | |                 "invalid node id {}, must be in [0, {}[",
[INFO] [stdout] 152 | |                 node, self.num_nodes
[INFO] [stdout] 153 | |             )
[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] 150 |             
[INFO] [stdout] 151 |                 "invalid node id {}, must be in [0, {}[",
[INFO] [stdout] 152 |                 node, self.num_nodes
[INFO] [stdout] 153 |             
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/preparation_graph.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 | /             format!(
[INFO] [stdout] 151 | |                 "invalid node id {}, must be in [0, {}[",
[INFO] [stdout] 152 | |                 node, self.num_nodes
[INFO] [stdout] 153 | |             )
[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] 150 |             
[INFO] [stdout] 151 |                 "invalid node id {}, must be in [0, {}[",
[INFO] [stdout] 152 |                 node, self.num_nodes
[INFO] [stdout] 153 |             
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 | /                 format!(
[INFO] [stdout] 184 | |                     "too many different paths: {}, out of {}, a few different paths can be expected \
[INFO] [stdout] 185 | |                     because of unambiguous shortest paths, but if there are too many something is \
[INFO] [stdout] 186 | |                     wrong",
[INFO] [stdout] 187 | |                     num_different_paths, NUM_QUERIES
[INFO] [stdout] 188 | |                 )
[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] 183 |                 
[INFO] [stdout] 184 |                     "too many different paths: {}, out of {}, a few different paths can be expected \
[INFO] [stdout] 185 |                     because of unambiguous shortest paths, but if there are too many something is \
[INFO] [stdout] 186 |                     wrong",
[INFO] [stdout] 187 |                     num_different_paths, NUM_QUERIES
[INFO] [stdout] 188 |                 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.98s
[INFO] running `Command { std: "docker" "inspect" "82b6233c5d460856038ab6d269b728c6fa9778ee994b2017bcee144f029dfd9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82b6233c5d460856038ab6d269b728c6fa9778ee994b2017bcee144f029dfd9b", kill_on_drop: false }`
[INFO] [stdout] 82b6233c5d460856038ab6d269b728c6fa9778ee994b2017bcee144f029dfd9b