[INFO] fetching crate geen 0.0.7...
[INFO] checking geen-0.0.7 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate geen 0.0.7 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate geen 0.0.7 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate geen 0.0.7
[INFO] finished tweaking crates.io crate geen 0.0.7
[INFO] tweaked toml for crates.io crate geen 0.0.7 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crunchy v0.2.2
[INFO] [stderr]   Downloaded rustc-hex v2.1.0
[INFO] [stderr]   Downloaded croaring v0.3.9
[INFO] [stderr]   Downloaded mohan v0.0.53
[INFO] [stderr]   Downloaded bindgen v0.37.4
[INFO] [stderr]   Downloaded ahash v0.2.18
[INFO] [stderr]   Downloaded uint v0.8.5
[INFO] [stderr]   Downloaded hashbrown v0.6.3
[INFO] [stderr]   Downloaded const-random v0.1.8
[INFO] [stderr]   Downloaded const-random-macro v0.1.8
[INFO] [stderr]   Downloaded croaring-sys v0.3.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97e507fbdfe02d90c59f9657bcf9426513252e43306103b082858ae18c473c64
[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" "97e507fbdfe02d90c59f9657bcf9426513252e43306103b082858ae18c473c64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97e507fbdfe02d90c59f9657bcf9426513252e43306103b082858ae18c473c64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97e507fbdfe02d90c59f9657bcf9426513252e43306103b082858ae18c473c64", kill_on_drop: false }`
[INFO] [stdout] 97e507fbdfe02d90c59f9657bcf9426513252e43306103b082858ae18c473c64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 4403a809e6fe758879c7b8816c51be9c8e9264da6a7ae9d91ceebc3f91fa7819
[INFO] running `Command { std: "docker" "start" "-a" "4403a809e6fe758879c7b8816c51be9c8e9264da6a7ae9d91ceebc3f91fa7819", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling cc v1.0.59
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[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bindgen v0.37.4
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking hashbrown v0.9.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
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[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking smallvec v1.4.2
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[INFO] [stderr]     Checking constant_time_eq v0.1.5
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[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling serde_json v1.0.57
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[INFO] [stderr]    Compiling proc-macro2 v0.3.5
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[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling clang-sys v0.23.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking blake2b_simd v0.5.10
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking uint v0.8.5
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
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[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling zeroize_derive v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]    Compiling croaring-sys v0.3.9
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking curve25519-dalek v2.1.0
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking mohan v0.0.53
[INFO] [stderr]     Checking croaring v0.3.9
[INFO] [stderr]     Checking geen v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/mmr.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 227 |         (self.get_merkle_root() == other.get_merkle_root())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/mutable_mmr.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         (self.get_merkle_root() == other.get_merkle_root())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/mmr.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 227 |         (self.get_merkle_root() == other.get_merkle_root())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/mutable_mmr.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         (self.get_merkle_root() == other.get_merkle_root())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/merkle_proof.rs:280:13
[INFO] [stdout]     |
[INFO] [stdout] 280 |         for i in 0..path_len.as_u64() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/merkle_proof.rs:287:13
[INFO] [stdout]     |
[INFO] [stdout] 287 |         for i in 0..peaks_len.as_u64() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:258:9
[INFO] [stdout]     |
[INFO] [stdout] 258 |         path_len.write(writer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:261:13
[INFO] [stdout]     |
[INFO] [stdout] 261 |             self.path[i].write(writer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:265:9
[INFO] [stdout]     |
[INFO] [stdout] 265 |         peaks_len.write(writer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:268:13
[INFO] [stdout]     |
[INFO] [stdout] 268 |             self.peaks[i].write(writer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/merkle_proof.rs:280:13
[INFO] [stdout]     |
[INFO] [stdout] 280 |         for i in 0..path_len.as_u64() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/merkle_proof.rs:287:13
[INFO] [stdout]     |
[INFO] [stdout] 287 |         for i in 0..peaks_len.as_u64() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:258:9
[INFO] [stdout]     |
[INFO] [stdout] 258 |         path_len.write(writer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:261:13
[INFO] [stdout]     |
[INFO] [stdout] 261 |             self.path[i].write(writer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:265:9
[INFO] [stdout]     |
[INFO] [stdout] 265 |         peaks_len.write(writer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/merkle_proof.rs:268:13
[INFO] [stdout]     |
[INFO] [stdout] 268 |             self.peaks[i].write(writer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 13s
[INFO] running `Command { std: "docker" "inspect" "4403a809e6fe758879c7b8816c51be9c8e9264da6a7ae9d91ceebc3f91fa7819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4403a809e6fe758879c7b8816c51be9c8e9264da6a7ae9d91ceebc3f91fa7819", kill_on_drop: false }`
[INFO] [stdout] 4403a809e6fe758879c7b8816c51be9c8e9264da6a7ae9d91ceebc3f91fa7819
