[INFO] fetching crate ascii_tree 0.1.1...
[INFO] testing ascii_tree-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate ascii_tree 0.1.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate ascii_tree 0.1.1 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 ascii_tree 0.1.1
[INFO] finished tweaking crates.io crate ascii_tree 0.1.1
[INFO] tweaked toml for crates.io crate ascii_tree 0.1.1 written to /workspace/builds/worker-14/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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 14db1a068ad54f63b68bd79b3cd87ae053ffdd4538e2e026f62506bca734a8d8
[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" "14db1a068ad54f63b68bd79b3cd87ae053ffdd4538e2e026f62506bca734a8d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14db1a068ad54f63b68bd79b3cd87ae053ffdd4538e2e026f62506bca734a8d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14db1a068ad54f63b68bd79b3cd87ae053ffdd4538e2e026f62506bca734a8d8", kill_on_drop: false }`
[INFO] [stdout] 14db1a068ad54f63b68bd79b3cd87ae053ffdd4538e2e026f62506bca734a8d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] a18046724664483b8045e0b72ee6aa166aa74684fe47c9748e3ed30c6f524704
[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" "a18046724664483b8045e0b72ee6aa166aa74684fe47c9748e3ed30c6f524704", kill_on_drop: false }`
[INFO] [stderr]    Compiling ascii_tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:62:27
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn write_tree(f: &mut Write, tree: &Tree) -> fmt::Result { write_tree_element(f, tree, &vec![]) }
[INFO] [stdout]    |                           ^^^^^ help: use `dyn`: `dyn Write`
[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:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn write_tree_element(f: &mut Write, tree: &Tree, level: &Vec<usize>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "a18046724664483b8045e0b72ee6aa166aa74684fe47c9748e3ed30c6f524704", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a18046724664483b8045e0b72ee6aa166aa74684fe47c9748e3ed30c6f524704", kill_on_drop: false }`
[INFO] [stdout] a18046724664483b8045e0b72ee6aa166aa74684fe47c9748e3ed30c6f524704
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 697eafb3dba75396a3e75e64af09ab502d2415ab13a2808501ec874fb7c2f866
[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" "697eafb3dba75396a3e75e64af09ab502d2415ab13a2808501ec874fb7c2f866", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:62:27
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn write_tree(f: &mut Write, tree: &Tree) -> fmt::Result { write_tree_element(f, tree, &vec![]) }
[INFO] [stdout]    |                           ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ascii_tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn write_tree_element(f: &mut Write, tree: &Tree, level: &Vec<usize>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:62:27
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn write_tree(f: &mut Write, tree: &Tree) -> fmt::Result { write_tree_element(f, tree, &vec![]) }
[INFO] [stdout]    |                           ^^^^^ help: use `dyn`: `dyn Write`
[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:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn write_tree_element(f: &mut Write, tree: &Tree, level: &Vec<usize>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "697eafb3dba75396a3e75e64af09ab502d2415ab13a2808501ec874fb7c2f866", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "697eafb3dba75396a3e75e64af09ab502d2415ab13a2808501ec874fb7c2f866", kill_on_drop: false }`
[INFO] [stdout] 697eafb3dba75396a3e75e64af09ab502d2415ab13a2808501ec874fb7c2f866
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 04ce79f2d6f04f7d877559ccf0f3cd1b472e4bc898aedad7ea43f0b6e54a3d6c
[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" "04ce79f2d6f04f7d877559ccf0f3cd1b472e4bc898aedad7ea43f0b6e54a3d6c", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:62:27
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn write_tree(f: &mut Write, tree: &Tree) -> fmt::Result { write_tree_element(f, tree, &vec![]) }
[INFO] [stderr]    |                           ^^^^^ help: use `dyn`: `dyn Write`
[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:64:31
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn write_tree_element(f: &mut Write, tree: &Tree, level: &Vec<usize>) -> fmt::Result {
[INFO] [stderr]    |                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:62:27
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn write_tree(f: &mut Write, tree: &Tree) -> fmt::Result { write_tree_element(f, tree, &vec![]) }
[INFO] [stderr]    |                           ^^^^^ help: use `dyn`: `dyn Write`
[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:64:31
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn write_tree_element(f: &mut Write, tree: &Tree, level: &Vec<usize>) -> fmt::Result {
[INFO] [stderr]    |                               ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ascii_tree-3946371c817fd399
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ascii_tree
[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] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - write_tree (line 57) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 3) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - write_tree (line 57) stdout ----
[INFO] [stdout] error[E0425]: cannot find function `write_tree` in this scope
[INFO] [stdout]  --> src/lib.rs:59:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | write_tree(&mut output, &tree);
[INFO] [stdout]   | ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `tree` in this scope
[INFO] [stdout]  --> src/lib.rs:59:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | write_tree(&mut output, &tree);
[INFO] [stdout]   |                          ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 3) stdout ----
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Leaf` in this scope
[INFO] [stdout]  --> src/lib.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | let l1 = Leaf(vec![String::from("line1"), String::from("line2"), String::from("line3"), String::from("line4")]);
[INFO] [stdout]   |          ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Leaf` in this scope
[INFO] [stdout]  --> src/lib.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | let l2 = Leaf(vec![String::from("only one line")]);
[INFO] [stdout]   |          ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Node` in this scope
[INFO] [stdout]    --> src/lib.rs:6:10
[INFO] [stdout]     |
[INFO] [stdout] 5   | let n1 = Node(String::from("node 1"), vec![l1.clone(), l2.clone()]);
[INFO] [stdout]     |          ^^^^ help: a unit variant with a similar name exists: `None`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Node` in this scope
[INFO] [stdout]    --> src/lib.rs:7:10
[INFO] [stdout]     |
[INFO] [stdout] 6   | let n2 = Node(String::from("node 2"), vec![l2.clone(), l1.clone(), l2.clone()]);
[INFO] [stdout]     |          ^^^^ help: a unit variant with a similar name exists: `None`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Node` in this scope
[INFO] [stdout]    --> src/lib.rs:8:10
[INFO] [stdout]     |
[INFO] [stdout] 7   | let n3 = Node(String::from("node 3"), vec![n1.clone(), l1.clone(), l2.clone()]);
[INFO] [stdout]     |          ^^^^ help: a unit variant with a similar name exists: `None`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Node` in this scope
[INFO] [stdout]    --> src/lib.rs:9:10
[INFO] [stdout]     |
[INFO] [stdout] 8   | let n4 = Node(String::from("node 4"), vec![n1, n2, n3]);
[INFO] [stdout]     |          ^^^^ help: a unit variant with a similar name exists: `None`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `write_tree` in this scope
[INFO] [stdout]   --> src/lib.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | let _ = write_tree(&mut output, &n4);
[INFO] [stdout]    |         ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 3)
[INFO] [stdout]     src/lib.rs - write_tree (line 57)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "04ce79f2d6f04f7d877559ccf0f3cd1b472e4bc898aedad7ea43f0b6e54a3d6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04ce79f2d6f04f7d877559ccf0f3cd1b472e4bc898aedad7ea43f0b6e54a3d6c", kill_on_drop: false }`
[INFO] [stdout] 04ce79f2d6f04f7d877559ccf0f3cd1b472e4bc898aedad7ea43f0b6e54a3d6c