[INFO] fetching crate darktoken 0.0.6...
[INFO] checking darktoken-0.0.6 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate darktoken 0.0.6 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate darktoken 0.0.6 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darktoken 0.0.6
[INFO] finished tweaking crates.io crate darktoken 0.0.6
[INFO] tweaked toml for crates.io crate darktoken 0.0.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate darktoken 0.0.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded subtle v2.2.2
[INFO] [stderr]   Downloaded bls12_381 v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab6d486b999f37cee95fa92b6413939d6f9387f4428c0eec1dff479a56e62697
[INFO] running `Command { std: "docker" "start" "-a" "ab6d486b999f37cee95fa92b6413939d6f9387f4428c0eec1dff479a56e62697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab6d486b999f37cee95fa92b6413939d6f9387f4428c0eec1dff479a56e62697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab6d486b999f37cee95fa92b6413939d6f9387f4428c0eec1dff479a56e62697", kill_on_drop: false }`
[INFO] [stdout] ab6d486b999f37cee95fa92b6413939d6f9387f4428c0eec1dff479a56e62697
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24bf4439039bfa82955fcb5a3ede717e791fe1f9989b5edf05ce51c3ee121fb8
[INFO] running `Command { std: "docker" "start" "-a" "24bf4439039bfa82955fcb5a3ede717e791fe1f9989b5edf05ce51c3ee121fb8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking subtle v2.2.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bls12_381 v0.1.1
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking darktoken v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stdout] warning: unused imports: `App`, `Arg`, and `SubCommand`
[INFO] [stdout]  --> examples/darktoken.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | use clap::{App, Arg, SubCommand};
[INFO] [stdout]   |            ^^^  ^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `from_slice` is never used
[INFO] [stdout]   --> examples/test.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn from_slice(bytes: &[u8]) -> [u8; 32] {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `FromString` is never used
[INFO] [stdout]   --> examples/test.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | trait FromString {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `from_string` is never used
[INFO] [stdout]   --> examples/test.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Foo {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn from_string(&self, serialized: &str) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> examples/darktoken.rs:951:5
[INFO] [stdout]     |
[INFO] [stdout] 949 |       return;
[INFO] [stdout]     |       ------ any code following this expression is unreachable
[INFO] [stdout] 950 |
[INFO] [stdout] 951 | /     let settings = CoconutSettings {
[INFO] [stdout] 952 | |         attributes: 2,
[INFO] [stdout] 953 | |
[INFO] [stdout] 954 | |         threshold: 5,
[INFO] [stdout] 955 | |         total: 7,
[INFO] [stdout] 956 | |     };
[INFO] [stdout]     | |______^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sign_request`
[INFO] [stdout]    --> examples/darktoken.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let sign_request = self.coconut.make_blind_sign_request(
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sign_request`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token1`
[INFO] [stdout]    --> examples/darktoken.rs:986:13
[INFO] [stdout]     |
[INFO] [stdout] 986 |         Ok((token1, token2)) => println!("split worked."),
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_token1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token2`
[INFO] [stdout]    --> examples/darktoken.rs:986:21
[INFO] [stdout]     |
[INFO] [stdout] 986 |         Ok((token1, token2)) => println!("split worked."),
[INFO] [stdout]     |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_token2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deposit_new` is never used
[INFO] [stdout]    --> examples/darktoken.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 96  | impl<'a> Wallet<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn deposit_new(&self, value: u64) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CommitProofBuilder` is never constructed
[INFO] [stdout]    --> examples/darktoken.rs:374:8
[INFO] [stdout]     |
[INFO] [stdout] 374 | struct CommitProofBuilder<'a, R: darktoken::RngInstance> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CommitProofCommitments` is never constructed
[INFO] [stdout]    --> examples/darktoken.rs:385:8
[INFO] [stdout]     |
[INFO] [stdout] 385 | struct CommitProofCommitments<'a, R: darktoken::RngInstance> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CommitProof` is never constructed
[INFO] [stdout]    --> examples/darktoken.rs:392:8
[INFO] [stdout]     |
[INFO] [stdout] 392 | struct CommitProof {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `commitments`, and `finish` are never used
[INFO] [stdout]    --> examples/darktoken.rs:398:8
[INFO] [stdout]     |
[INFO] [stdout] 397 | impl<'a, R: darktoken::RngInstance> CommitProofBuilder<'a, R> {
[INFO] [stdout]     | ------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 398 |     fn new(
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 412 |     fn commitments(&self) -> Box<dyn darktoken::ProofCommitments + 'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 422 |     fn finish(&self, challenge: &bls::Scalar) -> CommitProof {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `commitments` is never used
[INFO] [stdout]    --> examples/darktoken.rs:441:8
[INFO] [stdout]     |
[INFO] [stdout] 440 | impl CommitProof {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 441 |     fn commitments<'a, R: darktoken::RngInstance>(
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/darktoken.rs:779:9
[INFO] [stdout]     |
[INFO] [stdout] 779 |         fs::remove_file(&token_path);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 779 |         let _ = fs::remove_file(&token_path);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/darktoken.rs:807:13
[INFO] [stdout]     |
[INFO] [stdout] 807 |             fs::remove_file(&token_path);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 807 |             let _ = fs::remove_file(&token_path);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.45s
[INFO] running `Command { std: "docker" "inspect" "24bf4439039bfa82955fcb5a3ede717e791fe1f9989b5edf05ce51c3ee121fb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24bf4439039bfa82955fcb5a3ede717e791fe1f9989b5edf05ce51c3ee121fb8", kill_on_drop: false }`
[INFO] [stdout] 24bf4439039bfa82955fcb5a3ede717e791fe1f9989b5edf05ce51c3ee121fb8