[INFO] fetching crate synstructure_test_traits 0.1.0...
[INFO] checking synstructure_test_traits-0.1.0 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate synstructure_test_traits 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate synstructure_test_traits 0.1.0 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synstructure_test_traits 0.1.0
[INFO] finished tweaking crates.io crate synstructure_test_traits 0.1.0
[INFO] tweaked toml for crates.io crate synstructure_test_traits 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb19d720ecb98b330404ee54f168d9a2fa588a123ca6bc9653add91dd7111060
[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" "fb19d720ecb98b330404ee54f168d9a2fa588a123ca6bc9653add91dd7111060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb19d720ecb98b330404ee54f168d9a2fa588a123ca6bc9653add91dd7111060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb19d720ecb98b330404ee54f168d9a2fa588a123ca6bc9653add91dd7111060", kill_on_drop: false }`
[INFO] [stdout] fb19d720ecb98b330404ee54f168d9a2fa588a123ca6bc9653add91dd7111060
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2c72064886993cef42109215a41f1aa10c4a810b77cd92631c05fe9afd0f0c6
[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" "b2c72064886993cef42109215a41f1aa10c4a810b77cd92631c05fe9afd0f0c6", kill_on_drop: false }`
[INFO] [stderr]     Checking synstructure_test_traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> lib.rs:7:38
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn walk_fields(&self, walk: &mut FnMut(&WalkFields));
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&WalkFields)`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> lib.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn walk_fields(&self, walk: &mut FnMut(&WalkFields));
[INFO] [stdout]   |                                             ^^^^^^^^^^ help: use `dyn`: `dyn WalkFields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> lib.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn walk_fields(&self, _walk: &mut FnMut(&WalkFields)) {}
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&WalkFields)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> lib.rs:10:46
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn walk_fields(&self, _walk: &mut FnMut(&WalkFields)) {}
[INFO] [stdout]    |                                              ^^^^^^^^^^ help: use `dyn`: `dyn WalkFields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> lib.rs:7:38
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn walk_fields(&self, walk: &mut FnMut(&WalkFields));
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&WalkFields)`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> lib.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn walk_fields(&self, walk: &mut FnMut(&WalkFields));
[INFO] [stdout]   |                                             ^^^^^^^^^^ help: use `dyn`: `dyn WalkFields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> lib.rs:10:39
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn walk_fields(&self, _walk: &mut FnMut(&WalkFields)) {}
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&WalkFields)`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> lib.rs:10:46
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn walk_fields(&self, _walk: &mut FnMut(&WalkFields)) {}
[INFO] [stdout]    |                                              ^^^^^^^^^^ help: use `dyn`: `dyn WalkFields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "b2c72064886993cef42109215a41f1aa10c4a810b77cd92631c05fe9afd0f0c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2c72064886993cef42109215a41f1aa10c4a810b77cd92631c05fe9afd0f0c6", kill_on_drop: false }`
[INFO] [stdout] b2c72064886993cef42109215a41f1aa10c4a810b77cd92631c05fe9afd0f0c6