[INFO] cloning repository https://github.com/crumblingstatue/wct
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crumblingstatue/wct" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwct", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwct'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21f3150cf65484b2cb01200e2821d5fdf628596b
[INFO] checking crumblingstatue/wct against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwct" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crumblingstatue/wct on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crumblingstatue/wct
[INFO] finished tweaking git repo https://github.com/crumblingstatue/wct
[INFO] tweaked toml for git repo https://github.com/crumblingstatue/wct written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/crumblingstatue/wct already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] 90a8c147de9f8b64cb3eff6ead044378dfe8df1221f61e9fec5057c3375b5a94
[INFO] running `Command { std: "docker" "start" "-a" "90a8c147de9f8b64cb3eff6ead044378dfe8df1221f61e9fec5057c3375b5a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90a8c147de9f8b64cb3eff6ead044378dfe8df1221f61e9fec5057c3375b5a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90a8c147de9f8b64cb3eff6ead044378dfe8df1221f61e9fec5057c3375b5a94", kill_on_drop: false }`
[INFO] [stdout] 90a8c147de9f8b64cb3eff6ead044378dfe8df1221f61e9fec5057c3375b5a94
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 303301c991e3669fe0c4d555d8fcea906f41cface0caab0a082b6c3bd7ea5f36
[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" "303301c991e3669fe0c4d555d8fcea906f41cface0caab0a082b6c3bd7ea5f36", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling serde v1.0.81
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]    Compiling serde_derive v1.0.81
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking wct v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:22:73
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn parse_args(mut args: impl Iterator<Item = String>) -> Result<Op, Box<Error>> {
[INFO] [stdout]    |                                                                         ^^^^^ help: use `dyn`: `dyn Error`
[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]   --> src/main.rs:75:54
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn from_path(path: &str) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:79:62
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn save_to_path(&self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:84:46
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn good(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:88:45
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn bad(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:93:54
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn revert(&mut self, n: usize) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:110:66
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn corrupt_random(&mut self, times: usize) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:131:43
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn reset(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:22:73
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn parse_args(mut args: impl Iterator<Item = String>) -> Result<Op, Box<Error>> {
[INFO] [stdout]    |                                                                         ^^^^^ help: use `dyn`: `dyn Error`
[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]    --> src/main.rs:137:50
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn save(&self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:142:55
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn apply(&mut self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 | ) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:205:29
[INFO] [stdout]     |
[INFO] [stdout] 205 | fn main() -> Result<(), Box<Error>> {
[INFO] [stdout]     |                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:75:54
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn from_path(path: &str) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:79:62
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn save_to_path(&self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:84:46
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn good(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:88:45
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn bad(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:93:54
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn revert(&mut self, n: usize) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:110:66
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn corrupt_random(&mut self, times: usize) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:131:43
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn reset(&mut self) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:137:50
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn save(&self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:142:55
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn apply(&mut self, path: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 | ) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:205:29
[INFO] [stdout]     |
[INFO] [stdout] 205 | fn main() -> Result<(), Box<Error>> {
[INFO] [stdout]     |                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.56s
[INFO] running `Command { std: "docker" "inspect" "303301c991e3669fe0c4d555d8fcea906f41cface0caab0a082b6c3bd7ea5f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "303301c991e3669fe0c4d555d8fcea906f41cface0caab0a082b6c3bd7ea5f36", kill_on_drop: false }`
[INFO] [stdout] 303301c991e3669fe0c4d555d8fcea906f41cface0caab0a082b6c3bd7ea5f36