[INFO] fetching crate stringtree 0.2.0...
[INFO] testing stringtree-0.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate stringtree 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate stringtree 0.2.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23571dc86aff9b1c8e1651f519bced1245ffe00f0914f6147306a2b48dbef2c1
[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" "23571dc86aff9b1c8e1651f519bced1245ffe00f0914f6147306a2b48dbef2c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23571dc86aff9b1c8e1651f519bced1245ffe00f0914f6147306a2b48dbef2c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23571dc86aff9b1c8e1651f519bced1245ffe00f0914f6147306a2b48dbef2c1", kill_on_drop: false }`
[INFO] [stdout] 23571dc86aff9b1c8e1651f519bced1245ffe00f0914f6147306a2b48dbef2c1
[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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e301757039a8fe76e6e87a017fe722025a41017ef96c91c99daee5bce05ff8c3
[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" "e301757039a8fe76e6e87a017fe722025a41017ef96c91c99daee5bce05ff8c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "e301757039a8fe76e6e87a017fe722025a41017ef96c91c99daee5bce05ff8c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e301757039a8fe76e6e87a017fe722025a41017ef96c91c99daee5bce05ff8c3", kill_on_drop: false }`
[INFO] [stdout] e301757039a8fe76e6e87a017fe722025a41017ef96c91c99daee5bce05ff8c3
[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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5bc0f2391a38ef3398fe32edab21f8d21139cc41b3b95ab0ef8775624898aab
[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" "c5bc0f2391a38ef3398fe32edab21f8d21139cc41b3b95ab0ef8775624898aab", kill_on_drop: false }`
[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] [stderr]    Compiling stringtree v0.2.0 (/opt/rustwide/workdir)
[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: 4 warnings emitted
[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: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: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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "c5bc0f2391a38ef3398fe32edab21f8d21139cc41b3b95ab0ef8775624898aab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5bc0f2391a38ef3398fe32edab21f8d21139cc41b3b95ab0ef8775624898aab", kill_on_drop: false }`
[INFO] [stdout] c5bc0f2391a38ef3398fe32edab21f8d21139cc41b3b95ab0ef8775624898aab
[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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d0342549da97bf793433bd2a8215f35fb3d801df4430b6c59c2bc9cc326fec42
[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" "d0342549da97bf793433bd2a8215f35fb3d801df4430b6c59c2bc9cc326fec42", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl StringTree {
[INFO] [stderr]    |      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:22
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(s: &[&StringTree]) -> StringTreeBuf {
[INFO] [stderr]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:73:44
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub type StringTreeOption<'a> = Option<&'a StringTree>;
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:84:29
[INFO] [stderr]    |
[INFO] [stderr] 84 | pub type StringTreeFn = Box<Fn() -> &'static str>;
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> &'static str`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl StringTree {
[INFO] [stderr]    |      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:22
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new(s: &[&StringTree]) -> StringTreeBuf {
[INFO] [stderr]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:73:44
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub type StringTreeOption<'a> = Option<&'a StringTree>;
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:84:29
[INFO] [stderr]    |
[INFO] [stderr] 84 | pub type StringTreeFn = Box<Fn() -> &'static str>;
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> &'static str`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:124:17
[INFO] [stderr]     |
[INFO] [stderr] 124 |         let c: &StringTree = &StringTree::new(&[&"opt"]);
[INFO] [stderr]     |                 ^^^^^^^^^^ help: use `dyn`: `dyn StringTree`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/stringtree-3e5c00fec6b08253
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stringtree
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::test_stringtree_new ... ok
[INFO] [stdout] test test::test_stringtree_indent ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d0342549da97bf793433bd2a8215f35fb3d801df4430b6c59c2bc9cc326fec42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0342549da97bf793433bd2a8215f35fb3d801df4430b6c59c2bc9cc326fec42", kill_on_drop: false }`
[INFO] [stdout] d0342549da97bf793433bd2a8215f35fb3d801df4430b6c59c2bc9cc326fec42