[INFO] fetching crate lamport-sig 0.1.1...
[INFO] checking lamport-sig-0.1.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate lamport-sig 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate lamport-sig 0.1.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lamport-sig 0.1.1
[INFO] finished tweaking crates.io crate lamport-sig 0.1.1
[INFO] tweaked toml for crates.io crate lamport-sig 0.1.1 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages
[INFO] [stderr]       Adding crunchy v0.1.6 (latest: v0.2.2)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding rustc-hex v1.0.0 (latest: v2.1.0)
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-hex v1.0.0
[INFO] [stderr]   Downloaded crunchy v0.1.6
[INFO] [stderr]   Downloaded bigint v4.4.3
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98cec19b61735ca903915c98b85912479a8c257c1b75f422d237514194a76760
[INFO] running `Command { std: "docker" "start" "-a" "98cec19b61735ca903915c98b85912479a8c257c1b75f422d237514194a76760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98cec19b61735ca903915c98b85912479a8c257c1b75f422d237514194a76760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98cec19b61735ca903915c98b85912479a8c257c1b75f422d237514194a76760", kill_on_drop: false }`
[INFO] [stdout] 98cec19b61735ca903915c98b85912479a8c257c1b75f422d237514194a76760
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dd0474d603b8e47ae7a4038a0d8f8284f74def305dbf147d4767fdb398c28bc
[INFO] running `Command { std: "docker" "start" "-a" "3dd0474d603b8e47ae7a4038a0d8f8284f74def305dbf147d4767fdb398c28bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking rustc-hex v1.0.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking bigint v4.4.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking lamport-sig v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::iter::repeat`
[INFO] [stdout]  --> src/key.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::repeat;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::repeat`
[INFO] [stdout]  --> src/key.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::repeat;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/key.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut message = message_creation(plain_text);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/key.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut message = message_creation(plain_text);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrivateKey` is never constructed
[INFO] [stdout]  --> src/key.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct PrivateKey {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `PrivateKey` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PublicKey` is never constructed
[INFO] [stdout]   --> src/key.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct PublicKey {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PublicKey` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `PRIVATE_KEY_LENGT` is never used
[INFO] [stdout]   --> src/key.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub static PRIVATE_KEY_LENGT: usize = 256;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `SIGNATURE_LENGT` is never used
[INFO] [stdout]   --> src/key.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub static SIGNATURE_LENGT: usize = 256;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `sign`, and `to_public_key` are never used
[INFO] [stdout]   --> src/key.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl PrivateKey {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 22 |     pub fn new() -> PrivateKey {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn sign(&self, plain_text: &str) -> Vec<U256> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn to_public_key(&self) -> PublicKey {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `verify` is never used
[INFO] [stdout]   --> src/key.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl PublicKey {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 57 |     pub fn verify(&self, plain_text: &str, signature: Vec<U256>) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prv_key_pair` is never used
[INFO] [stdout]   --> src/key.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn prv_key_pair() -> (U256, U256) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_uint256` is never used
[INFO] [stdout]   --> src/key.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn random_uint256() -> U256 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u64_to_uint256` is never used
[INFO] [stdout]   --> src/key.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn u64_to_uint256() -> U256 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pub_key_pair` is never used
[INFO] [stdout]   --> src/key.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn pub_key_pair(adam: &U256, eve: &U256) -> (U256, U256) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sha256_hash` is never used
[INFO] [stdout]   --> src/key.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn sha256_hash(target: &str) -> U256 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `message_creation` is never used
[INFO] [stdout]   --> src/key.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn message_creation(plain_text: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `text_to_binary` is never used
[INFO] [stdout]   --> src/key.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn text_to_binary(hashed_text: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_binary` is never used
[INFO] [stdout]    --> src/key.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn to_binary(c: char) -> String {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `from_str` is never used
[INFO] [stdout]    --> src/key.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn from_str(value: &str) -> U256 {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare_with_pub` is never used
[INFO] [stdout]    --> src/key.rs:135:4
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn compare_with_pub(signature: U256, pub_key: U256) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/key.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut message = message_creation(plain_text);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/key.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut message = message_creation(plain_text);
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.62s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bigint v4.4.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "3dd0474d603b8e47ae7a4038a0d8f8284f74def305dbf147d4767fdb398c28bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dd0474d603b8e47ae7a4038a0d8f8284f74def305dbf147d4767fdb398c28bc", kill_on_drop: false }`
[INFO] [stdout] 3dd0474d603b8e47ae7a4038a0d8f8284f74def305dbf147d4767fdb398c28bc