[INFO] fetching crate stringtree 0.2.0...
[INFO] checking stringtree-0.2.0 against try#32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d for pr-83312
[INFO] extracting crate stringtree 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate stringtree 0.2.0 on toolchain 32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stringtree 0.2.0
[INFO] finished tweaking crates.io crate stringtree 0.2.0
[INFO] tweaked toml for crates.io crate stringtree 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "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] c4bbd61cb76a3f0406704921ca9382db30a9789bc1fb0bcce53579991230c881
[INFO] running `Command { std: "docker" "start" "-a" "c4bbd61cb76a3f0406704921ca9382db30a9789bc1fb0bcce53579991230c881", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4bbd61cb76a3f0406704921ca9382db30a9789bc1fb0bcce53579991230c881", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4bbd61cb76a3f0406704921ca9382db30a9789bc1fb0bcce53579991230c881", kill_on_drop: false }`
[INFO] [stdout] c4bbd61cb76a3f0406704921ca9382db30a9789bc1fb0bcce53579991230c881
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef799e691f1b3af9d509bb99b55a783be860c7eb819c0c343ad6a50445ccd3bf
[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" "ef799e691f1b3af9d509bb99b55a783be860c7eb819c0c343ad6a50445ccd3bf", kill_on_drop: false }`
[INFO] [stderr]     Checking stringtree v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl StringTree {
[INFO] [stdout]    |      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[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/lib.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(s: &[&StringTree]) -> StringTreeBuf {
[INFO] [stdout]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub type StringTreeOption<'a> = Option<&'a StringTree>;
[INFO] [stdout]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:84:29
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub type StringTreeFn = Box<Fn() -> &'static str>;
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> &'static str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl StringTree {
[INFO] [stdout]    |      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[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/lib.rs:124:17
[INFO] [stdout]     |
[INFO] [stdout] 124 |         let c: &StringTree = &StringTree::new(&[&"opt"]);
[INFO] [stdout]     |                 ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(s: &[&StringTree]) -> StringTreeBuf {
[INFO] [stdout]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub type StringTreeOption<'a> = Option<&'a StringTree>;
[INFO] [stdout]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:84:29
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub type StringTreeFn = Box<Fn() -> &'static str>;
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> &'static str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:99:18
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let i0 = StringTree::indent(&"x");
[INFO] [stdout]    |                  ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:112:20
[INFO] [stdout]     |
[INFO] [stdout] 112 |         assert_eq!(StringTree::new(&[]).to_string(), "");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:113:20
[INFO] [stdout]     |
[INFO] [stdout] 113 |         assert_eq!(StringTree::new(&[&"foo"]).to_string(), "foo");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:20
[INFO] [stdout]     |
[INFO] [stdout] 114 |         assert_eq!(StringTree::new(&[&"foo", &"bar"]).to_string(), "foobar");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:116:18
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let i2 = StringTree::indent("x").next().next();
[INFO] [stdout]     |                  ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:117:20
[INFO] [stdout]     |
[INFO] [stdout] 117 |         assert_eq!(StringTree::new(&[&i2, &"bar"]).to_string(), "xxbar");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:120:20
[INFO] [stdout]     |
[INFO] [stdout] 120 |         assert_eq!(StringTree::new(&[&f]).to_string(), "foo");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 |         assert_eq!(StringTree::new(&[&"bar", &f]).to_string(), "barfoo");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:124:31
[INFO] [stdout]     |
[INFO] [stdout] 124 |         let c: &StringTree = &StringTree::new(&[&"opt"]);
[INFO] [stdout]     |                               ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:126:20
[INFO] [stdout]     |
[INFO] [stdout] 126 |         assert_eq!(StringTree::new(&[&none]).to_string(), "");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:127:20
[INFO] [stdout]     |
[INFO] [stdout] 127 |         assert_eq!(StringTree::new(&[&some]).to_string(), "opt");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:128:20
[INFO] [stdout]     |
[INFO] [stdout] 128 |         assert_eq!(StringTree::new(&[&"foo", &none, &some]).to_string(), "fooopt");
[INFO] [stdout]     |                    ^^^^^^^^^^ help: use `dyn`: `<dyn StringTree>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "ef799e691f1b3af9d509bb99b55a783be860c7eb819c0c343ad6a50445ccd3bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef799e691f1b3af9d509bb99b55a783be860c7eb819c0c343ad6a50445ccd3bf", kill_on_drop: false }`
[INFO] [stdout] ef799e691f1b3af9d509bb99b55a783be860c7eb819c0c343ad6a50445ccd3bf