[INFO] fetching crate tulip-derivative 2.2.1...
[INFO] testing tulip-derivative-2.2.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tulip-derivative 2.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate tulip-derivative 2.2.1
[INFO] finished tweaking crates.io crate tulip-derivative 2.2.1
[INFO] tweaked toml for crates.io crate tulip-derivative 2.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tulip-derivative 2.2.1 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding runtime-macros-derive v0.4.0 (available: v0.8.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.117)
[INFO] [stderr]       Adding trybuild v1.0.22 (available: v1.0.116)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08735fedf9cec16cc0eeba0fdef7cc3e51ef130afff17493828a63dedff42089
[INFO] running `Command { std: "docker" "start" "-a" "08735fedf9cec16cc0eeba0fdef7cc3e51ef130afff17493828a63dedff42089", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08735fedf9cec16cc0eeba0fdef7cc3e51ef130afff17493828a63dedff42089", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08735fedf9cec16cc0eeba0fdef7cc3e51ef130afff17493828a63dedff42089", kill_on_drop: false }`
[INFO] [stdout] 08735fedf9cec16cc0eeba0fdef7cc3e51ef130afff17493828a63dedff42089
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5e4a132d13820f7930208fb12f0c37d70316c127d9305d4dd1d42b14c9651fa
[INFO] running `Command { std: "docker" "start" "-a" "d5e4a132d13820f7930208fb12f0c37d70316c127d9305d4dd1d42b14c9651fa", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling tulip-derivative v2.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin_include`
[INFO] [stdout]   --> src/lib.rs:72:11
[INFO] [stdout]    |
[INFO] [stdout] 72 | #[cfg(not(tarpaulin_include))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin_include)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin_include)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> src/ast.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Field<'a> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub span: proc_macro2::Span,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Field` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ast.rs:87:23
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn all_fields(&self) -> Vec<&Field> {
[INFO] [stdout]    |                       ^^^^^         ^^^^^^
[INFO] [stdout]    |                       |             ||
[INFO] [stdout]    |                       |             |the same lifetime is hidden here
[INFO] [stdout]    |                       |             the same lifetime is elided here
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn all_fields(&self) -> Vec<&Field<'_>> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `Command { std: "docker" "inspect" "d5e4a132d13820f7930208fb12f0c37d70316c127d9305d4dd1d42b14c9651fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5e4a132d13820f7930208fb12f0c37d70316c127d9305d4dd1d42b14c9651fa", kill_on_drop: false }`
[INFO] [stdout] d5e4a132d13820f7930208fb12f0c37d70316c127d9305d4dd1d42b14c9651fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b452f96a2fc75d018ad4ca5c4529cae5ef3226146ddbe4c48b2849c93006a5a
[INFO] running `Command { std: "docker" "start" "-a" "0b452f96a2fc75d018ad4ca5c4529cae5ef3226146ddbe4c48b2849c93006a5a", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling runtime-macros-derive v0.4.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling tulip-derivative v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin_include`
[INFO] [stdout]   --> src/lib.rs:72:11
[INFO] [stdout]    |
[INFO] [stdout] 72 | #[cfg(not(tarpaulin_include))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin_include)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin_include)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> src/ast.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Field<'a> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub span: proc_macro2::Span,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Field` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ast.rs:87:23
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn all_fields(&self) -> Vec<&Field> {
[INFO] [stdout]    |                       ^^^^^         ^^^^^^
[INFO] [stdout]    |                       |             ||
[INFO] [stdout]    |                       |             |the same lifetime is hidden here
[INFO] [stdout]    |                       |             the same lifetime is elided here
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn all_fields(&self) -> Vec<&Field<'_>> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling trybuild v1.0.22
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-deriving-via-extension-type-params.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/issue-82.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-deriving-cmp-generic-struct.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "issue-82") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-deriving-cmp-generic-struct") due to 1 previous error
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-deriving-via-extension-type-params") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-issue-21402.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/issue-37-turbofish.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/derive-debug-packed.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "issue-37-turbofish") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-issue-21402") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-issue-28561.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/clippy-warning-clone-from.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-deriving-clone-tuple-struct.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "derive-debug-packed") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-deriving-hash.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "clippy-warning-clone-from") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-exterior.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-exterior") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-issue-19135") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-issue-19135.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-deriving-clone-tuple-struct") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-issue-28561") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "derive-eq") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]   --> tests/rustc-issue-12860.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate derivative;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-issue-12860") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/derive-eq.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-deriving-show-2") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "derive-hash") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/rustc-deriving-show-2.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `derivative`
[INFO] [stdout]  --> tests/derive-hash.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate derivative;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tulip-derivative` (test "rustc-deriving-hash") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0b452f96a2fc75d018ad4ca5c4529cae5ef3226146ddbe4c48b2849c93006a5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b452f96a2fc75d018ad4ca5c4529cae5ef3226146ddbe4c48b2849c93006a5a", kill_on_drop: false }`
[INFO] [stdout] 0b452f96a2fc75d018ad4ca5c4529cae5ef3226146ddbe4c48b2849c93006a5a
