[INFO] cloning repository https://github.com/Craig-Macomber/exist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Craig-Macomber/exist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraig-Macomber%2Fexist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraig-Macomber%2Fexist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 139a0bf6d1efdafdc8d4226edc21b6f8a99808eb
[INFO] checking Craig-Macomber/exist against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraig-Macomber%2Fexist" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Craig-Macomber/exist on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Craig-Macomber/exist
[INFO] finished tweaking git repo https://github.com/Craig-Macomber/exist
[INFO] tweaked toml for git repo https://github.com/Craig-Macomber/exist written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Craig-Macomber/exist already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byte-tools v0.3.0
[INFO] [stderr]   Downloaded opaque-debug v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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] 58f2e283ae0c75bfc504d83cfb4c94614d3b46867b6528395daf2213d135a822
[INFO] running `Command { std: "docker" "start" "-a" "58f2e283ae0c75bfc504d83cfb4c94614d3b46867b6528395daf2213d135a822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58f2e283ae0c75bfc504d83cfb4c94614d3b46867b6528395daf2213d135a822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58f2e283ae0c75bfc504d83cfb4c94614d3b46867b6528395daf2213d135a822", kill_on_drop: false }`
[INFO] [stdout] 58f2e283ae0c75bfc504d83cfb4c94614d3b46867b6528395daf2213d135a822
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5160c02692022e3b40d064220f193e7ab7cfda5e3d7868c81edc296f7a42801
[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" "b5160c02692022e3b40d064220f193e7ab7cfda5e3d7868c81edc296f7a42801", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.83
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking byte-tools v0.3.0
[INFO] [stderr]     Checking opaque-debug v0.2.1
[INFO] [stderr]     Checking half v1.3.0
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]     Checking generic-array v0.12.0
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking digest v0.8.0
[INFO] [stderr]     Checking blake2 v0.8.0
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling serde_derive v1.0.83
[INFO] [stderr]     Checking serde_json v1.0.34
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking serde_cbor v0.9.0
[INFO] [stderr]     Checking exist v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: ambiguous associated item
[INFO] [stdout]   --> src/data_models/leaf_tree.rs:34:37
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn visit<V: Visitor<Value = Self::Value>>(&self, v: &mut V) {
[INFO] [stdout]    |                                     ^^^^^^^^^^^ help: use fully-qualified syntax: `<leaf_tree::concrete::Concrete<Value> as View>::Value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(ambiguous_associated_items)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stdout] note: `Value` could refer to the variant defined here
[INFO] [stdout]   --> src/data_models/leaf_tree.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Value(V),
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] note: `Value` could also refer to the associated type defined here
[INFO] [stdout]   --> src/data_models/mod.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 |             $(type $Items;)*
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/data_models/leaf_tree.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | Visitable!(View, Visitor, Value);
[INFO] [stdout]    | -------------------------------- in this macro invocation
[INFO] [stdout]    = note: this error originates in the macro `Visitable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: ambiguous associated item
[INFO] [stdout]   --> src/data_models/leaf_tree.rs:34:37
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn visit<V: Visitor<Value = Self::Value>>(&self, v: &mut V) {
[INFO] [stdout]    |                                     ^^^^^^^^^^^ help: use fully-qualified syntax: `<leaf_tree::concrete::Concrete<Value> as View>::Value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(ambiguous_associated_items)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stdout] note: `Value` could refer to the variant defined here
[INFO] [stdout]   --> src/data_models/leaf_tree.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Value(V),
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] note: `Value` could also refer to the associated type defined here
[INFO] [stdout]   --> src/data_models/mod.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 |             $(type $Items;)*
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/data_models/leaf_tree.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | Visitable!(View, Visitor, Value);
[INFO] [stdout]    | -------------------------------- in this macro invocation
[INFO] [stdout]    = note: this error originates in the macro `Visitable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BYTE_PATTERN_TEMPLATE_MARKER`
[INFO] [stdout]   --> src/prefix_encoding.rs:80:1
[INFO] [stdout]    |
[INFO] [stdout] 80 | const BYTE_PATTERN_TEMPLATE_MARKER: u8 = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TREE_TEMPLATE_MARKER`
[INFO] [stdout]   --> src/prefix_encoding.rs:95:1
[INFO] [stdout]    |
[INFO] [stdout] 95 | const TREE_TEMPLATE_MARKER: u8 = 3;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TEMPLATE_USE_SEQUENCE_MARKER`
[INFO] [stdout]    --> src/prefix_encoding.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | const TEMPLATE_USE_SEQUENCE_MARKER: u8 = 5;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Shape`
[INFO] [stdout]    --> src/prefix_encoding.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | struct Shape {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_shape`
[INFO] [stdout]    --> src/prefix_encoding.rs:180:4
[INFO] [stdout]     |
[INFO] [stdout] 180 | fn get_shape<TView: View<Value = u8>>(view: TView) -> Shape {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ShapeState`
[INFO] [stdout]    --> src/prefix_encoding.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 204 | struct ShapeState {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]  --> src/leaf_tree_template.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     size: u32,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `offset`
[INFO] [stdout]   --> src/leaf_tree_template.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     offset: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exist` due to 2 previous errors; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: constant is never used: `BYTE_PATTERN_TEMPLATE_MARKER`
[INFO] [stdout]   --> src/prefix_encoding.rs:80:1
[INFO] [stdout]    |
[INFO] [stdout] 80 | const BYTE_PATTERN_TEMPLATE_MARKER: u8 = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TREE_TEMPLATE_MARKER`
[INFO] [stdout]   --> src/prefix_encoding.rs:95:1
[INFO] [stdout]    |
[INFO] [stdout] 95 | const TREE_TEMPLATE_MARKER: u8 = 3;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TEMPLATE_USE_SEQUENCE_MARKER`
[INFO] [stdout]    --> src/prefix_encoding.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | const TEMPLATE_USE_SEQUENCE_MARKER: u8 = 5;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Shape`
[INFO] [stdout]    --> src/prefix_encoding.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | struct Shape {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_shape`
[INFO] [stdout]    --> src/prefix_encoding.rs:180:4
[INFO] [stdout]     |
[INFO] [stdout] 180 | fn get_shape<TView: View<Value = u8>>(view: TView) -> Shape {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ShapeState`
[INFO] [stdout]    --> src/prefix_encoding.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 204 | struct ShapeState {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]  --> src/leaf_tree_template.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     size: u32,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `offset`
[INFO] [stdout]   --> src/leaf_tree_template.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     offset: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b5160c02692022e3b40d064220f193e7ab7cfda5e3d7868c81edc296f7a42801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5160c02692022e3b40d064220f193e7ab7cfda5e3d7868c81edc296f7a42801", kill_on_drop: false }`
[INFO] [stdout] b5160c02692022e3b40d064220f193e7ab7cfda5e3d7868c81edc296f7a42801