[INFO] fetching crate ex3-merkle 0.15.0...
[INFO] checking ex3-merkle-0.15.0 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate ex3-merkle 0.15.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate ex3-merkle 0.15.0 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ex3-merkle 0.15.0
[INFO] finished tweaking crates.io crate ex3-merkle 0.15.0
[INFO] tweaked toml for crates.io crate ex3-merkle 0.15.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac266608d13790917fc028d245ef2f53ab87cf2309a4b3469514039518fe3ef9
[INFO] running `Command { std: "docker" "start" "-a" "ac266608d13790917fc028d245ef2f53ab87cf2309a4b3469514039518fe3ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac266608d13790917fc028d245ef2f53ab87cf2309a4b3469514039518fe3ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac266608d13790917fc028d245ef2f53ab87cf2309a4b3469514039518fe3ef9", kill_on_drop: false }`
[INFO] [stdout] ac266608d13790917fc028d245ef2f53ab87cf2309a4b3469514039518fe3ef9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3effd4d6fb61c7f58da4bb89add81e52e77b20fef35c40c6b441c36000c2244e
[INFO] running `Command { std: "docker" "start" "-a" "3effd4d6fb61c7f58da4bb89add81e52e77b20fef35c40c6b441c36000c2244e", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking ex3-merkle v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]  --> tests/merkle_proof_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use ex3_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   --> tests/merkle_proof_test.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 87 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]  --> tests/merkle_proof_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use ex3_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    --> tests/merkle_proof_test.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     use rs_merkle::{algorithms::Sha256, Error, MerkleProof};
[INFO] [stdout]     |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]     |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 113 |     use ex3_merkle::{algorithms::Sha256, Error, MerkleProof};
[INFO] [stdout]     |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]   --> tests/merkle_proof_test.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 87 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]    --> tests/merkle_proof_test.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     use rs_merkle::{algorithms::Sha256, Error, MerkleProof};
[INFO] [stdout]     |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]     |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 113 |     use ex3_merkle::{algorithms::Sha256, Error, MerkleProof};
[INFO] [stdout]     |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]  --> tests/merkle_tree_test.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use rs_merkle::{
[INFO] [stdout]   |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use ex3_merkle::{
[INFO] [stdout]   |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]  --> tests/common.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rs_merkle::{
[INFO] [stdout]   |     ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ex3_merkle::{
[INFO] [stdout]   |     ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 33 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]  --> tests/merkle_tree_test.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use rs_merkle::{
[INFO] [stdout]   |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use ex3_merkle::{
[INFO] [stdout]   |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 48 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 33 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use ex3_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     use rs_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 48 |     use ex3_merkle::{algorithms::Sha256, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    --> tests/merkle_tree_test.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 |     use rs_merkle::{algorithms::Sha256, Hasher, MerkleTree};
[INFO] [stdout]     |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]     |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 201 |     use ex3_merkle::{algorithms::Sha256, Hasher, MerkleTree};
[INFO] [stdout]     |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]    |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use ex3_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rs_merkle`
[INFO] [stdout]    --> tests/merkle_tree_test.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 |     use rs_merkle::{algorithms::Sha256, Hasher, MerkleTree};
[INFO] [stdout]     |         ^^^^^^^^^ use of undeclared crate or module `rs_merkle`
[INFO] [stdout]     |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 201 |     use ex3_merkle::{algorithms::Sha256, Hasher, MerkleTree};
[INFO] [stdout]     |         ~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_proof_test.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_tree_test.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::borrow::ToOwned`
[INFO] [stdout]  --> src/prelude.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub use alloc::borrow::ToOwned;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TryFrom` and `TryInto`
[INFO] [stdout]   --> src/prelude.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use core::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                         ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::iter::FromIterator`
[INFO] [stdout]   --> src/prelude.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use core::iter::FromIterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ex3-merkle` (test "common") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ex3-merkle` (test "merkle_proof_test") due to 8 previous errors; 1 warning emitted
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ex3-merkle` (test "merkle_tree_test") due to 12 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "3effd4d6fb61c7f58da4bb89add81e52e77b20fef35c40c6b441c36000c2244e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3effd4d6fb61c7f58da4bb89add81e52e77b20fef35c40c6b441c36000c2244e", kill_on_drop: false }`
[INFO] [stdout] 3effd4d6fb61c7f58da4bb89add81e52e77b20fef35c40c6b441c36000c2244e
