[INFO] cloning repository https://github.com/eminence/snapshot_trim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eminence/snapshot_trim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feminence%2Fsnapshot_trim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feminence%2Fsnapshot_trim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1bb505cdca364d322f9268fbc7a284734044a4b
[INFO] checking eminence/snapshot_trim against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feminence%2Fsnapshot_trim" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eminence/snapshot_trim on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eminence/snapshot_trim
[INFO] finished tweaking git repo https://github.com/eminence/snapshot_trim
[INFO] tweaked toml for git repo https://github.com/eminence/snapshot_trim written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/eminence/snapshot_trim already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28fae290071d994108d78c86b80e948a80d27240beca4b3804d72ca875b2fa2f
[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" "28fae290071d994108d78c86b80e948a80d27240beca4b3804d72ca875b2fa2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28fae290071d994108d78c86b80e948a80d27240beca4b3804d72ca875b2fa2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28fae290071d994108d78c86b80e948a80d27240beca4b3804d72ca875b2fa2f", kill_on_drop: false }`
[INFO] [stdout] 28fae290071d994108d78c86b80e948a80d27240beca4b3804d72ca875b2fa2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a22e7e6743413ed653f621e29d8c85c0bd10098ee7f2900a5b05b5913ce24c7
[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" "6a22e7e6743413ed653f621e29d8c85c0bd10098ee7f2900a5b05b5913ce24c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking serde v1.0.24
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking regex v0.2.3
[INFO] [stderr]    Compiling serde_derive_internals v0.18.0
[INFO] [stderr]    Compiling serde_derive v1.0.24
[INFO] [stderr]     Checking toml v0.4.5
[INFO] [stderr]     Checking docopt v0.8.1
[INFO] [stderr]     Checking snapshot_trim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:35:30
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Err(e) => panic!(format!("{} - {}", e, snap)),
[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] 35 |             Err(e) => panic!("{} - {}", e, snap),
[INFO] [stdout]    |                             --                --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]    --> src/main.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{} Error: ~/.snapshot.toml doesn't exist");
[INFO] [stdout]     |                 ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{} Error: ~/.snapshot.toml doesn't exist", ...);
[INFO] [stdout]     |                                                          ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{}", "{} Error: ~/.snapshot.toml doesn't exist");
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:35:30
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Err(e) => panic!(format!("{} - {}", e, snap)),
[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] 35 |             Err(e) => panic!("{} - {}", e, snap),
[INFO] [stdout]    |                             --                --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]    --> src/main.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{} Error: ~/.snapshot.toml doesn't exist");
[INFO] [stdout]     |                 ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{} Error: ~/.snapshot.toml doesn't exist", ...);
[INFO] [stdout]     |                                                          ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 200 |         panic!("{}", "{} Error: ~/.snapshot.toml doesn't exist");
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         write!(fmt, "<Snapshot {:?} {:?}>", self.snap, self.state);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         write!(fmt, "<Snapshot {:?} {:?}>", self.snap, self.state);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.71s
[INFO] running `Command { std: "docker" "inspect" "6a22e7e6743413ed653f621e29d8c85c0bd10098ee7f2900a5b05b5913ce24c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a22e7e6743413ed653f621e29d8c85c0bd10098ee7f2900a5b05b5913ce24c7", kill_on_drop: false }`
[INFO] [stdout] 6a22e7e6743413ed653f621e29d8c85c0bd10098ee7f2900a5b05b5913ce24c7