[INFO] fetching crate cuckoo_miner 0.5.2...
[INFO] checking cuckoo_miner-0.5.2 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate cuckoo_miner 0.5.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate cuckoo_miner 0.5.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cuckoo_miner 0.5.2
[INFO] finished tweaking crates.io crate cuckoo_miner 0.5.2
[INFO] tweaked toml for crates.io crate cuckoo_miner 0.5.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7699b20c114df75b887d3d46b6cb7e87674f5d1bb46fa26002807fe8f57a9e82
[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" "7699b20c114df75b887d3d46b6cb7e87674f5d1bb46fa26002807fe8f57a9e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7699b20c114df75b887d3d46b6cb7e87674f5d1bb46fa26002807fe8f57a9e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7699b20c114df75b887d3d46b6cb7e87674f5d1bb46fa26002807fe8f57a9e82", kill_on_drop: false }`
[INFO] [stdout] 7699b20c114df75b887d3d46b6cb7e87674f5d1bb46fa26002807fe8f57a9e82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd4878ac2b7a80002a31da2df769f3d9406bcfdf52e57df6b6e1386756f989d6
[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" "fd4878ac2b7a80002a31da2df769f3d9406bcfdf52e57df6b6e1386756f989d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking slog v2.1.1
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking const-cstr v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking slog-async v2.5.0
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling cuckoo_miner v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stdout] warning: unused import: `sanity::Finder`
[INFO] [stdout]   --> src/build.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use sanity::Finder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Finder`
[INFO] [stdout]   --> src/sanity.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Finder {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/sanity.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `maybe_have`
[INFO] [stdout]   --> src/sanity.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn maybe_have<S: AsRef<OsStr>>(&mut self, cmd: S) -> Option<PathBuf> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking slog-term v2.6.0
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking grin_miner_util v0.5.2
[INFO] [stderr]     Checking grin_miner_plugin v0.5.2
[INFO] [stdout] warning: constant is never used: `T4_GENESIS_PROOF`
[INFO] [stdout]   --> tests/common/mod.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | / pub const T4_GENESIS_PROOF:[u64; 42] = [
[INFO] [stdout] 38 | | 0x46f3b4, 0x1135f8c, 0x1a1596f, 0x1e10f71, 0x41c03ea, 0x63fe8e7, 0x65af34f,
[INFO] [stdout] 39 | | 0x73c16d3, 0x8216dc3, 0x9bc75d0, 0xae7d9ad, 0xc1cb12b, 0xc65e957, 0xf67a152,
[INFO] [stdout] 40 | | 0xfac6559, 0x100c3d71, 0x11eea08b, 0x1225dfbb, 0x124d61a1, 0x132a14b4, 0x13f4ec38,
[INFO] [stdout] 41 | | 0x1542d236, 0x155f2df0, 0x1577394e, 0x163c3513, 0x19349845, 0x19d46953, 0x19f65ed4,
[INFO] [stdout] 42 | | 0x1a0411b9, 0x1a2fa039, 0x1a72a06c, 0x1b02ddd2, 0x1b594d59, 0x1b7bffd3, 0x1befe12e,
[INFO] [stdout] 43 | | 0x1c82e4cd, 0x1d492478, 0x1de132a5, 0x1e578b3c, 0x1ed96855, 0x1f222896, 0x1fea0da6];
[INFO] [stdout]    | |____________________________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pl`
[INFO] [stdout]    --> tests/plugins.rs:156:15
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn run_solver(pl: &PluginLibrary, params: SolverParams) {
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pl`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `params`
[INFO] [stdout]    --> tests/plugins.rs:156:35
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn run_solver(pl: &PluginLibrary, params: SolverParams) {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_params`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `T4_GENESIS_PREPOW`
[INFO] [stdout]   --> tests/common/mod.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | / pub const T4_GENESIS_PREPOW:&str = "00010000000000000000000000005bc794c0fffffffff\
[INFO] [stdout] 29 | | fffffffffffffffffffffffffffffffffffffffffffffffffffffff0000000000000000000000\
[INFO] [stdout] 30 | | 00000000000000000000000000000000000000000000000000000000000000000000000000000\
[INFO] [stdout] 31 | | 00000000000000000000000000000000000000000000000000000000000000000000000000000\
[INFO] [stdout] 32 | | 00000000000000000000000000000000000000000000000000000000000000000000000000000\
[INFO] [stdout] 33 | | 00000000000000000000000000000000000000000000000000000000000000000000000000000\
[INFO] [stdout] 34 | | 000000000000000000000000000000001c5200000007407784d410a210b1ba";
[INFO] [stdout]    | |________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `T4_GENESIS_PROOF`
[INFO] [stdout]   --> tests/common/mod.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | / pub const T4_GENESIS_PROOF:[u64; 42] = [
[INFO] [stdout] 38 | | 0x46f3b4, 0x1135f8c, 0x1a1596f, 0x1e10f71, 0x41c03ea, 0x63fe8e7, 0x65af34f,
[INFO] [stdout] 39 | | 0x73c16d3, 0x8216dc3, 0x9bc75d0, 0xae7d9ad, 0xc1cb12b, 0xc65e957, 0xf67a152,
[INFO] [stdout] 40 | | 0xfac6559, 0x100c3d71, 0x11eea08b, 0x1225dfbb, 0x124d61a1, 0x132a14b4, 0x13f4ec38,
[INFO] [stdout] 41 | | 0x1542d236, 0x155f2df0, 0x1577394e, 0x163c3513, 0x19349845, 0x19d46953, 0x19f65ed4,
[INFO] [stdout] 42 | | 0x1a0411b9, 0x1a2fa039, 0x1a72a06c, 0x1b02ddd2, 0x1b594d59, 0x1b7bffd3, 0x1befe12e,
[INFO] [stdout] 43 | | 0x1c82e4cd, 0x1d492478, 0x1de132a5, 0x1e578b3c, 0x1ed96855, 0x1f222896, 0x1fea0da6];
[INFO] [stdout]    | |____________________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mining_plugin_dir_for_tests`
[INFO] [stdout]   --> tests/common/mod.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn mining_plugin_dir_for_tests() -> PathBuf {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mine_async_for_duration`
[INFO] [stdout]   --> tests/common/mod.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn mine_async_for_duration(configs: &Vec<PluginConfig>, duration_in_seconds: i64) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CUCKATOO_29_SOL`
[INFO] [stdout]   --> tests/plugins.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | / const CUCKATOO_29_SOL: [u64; 42] = [
[INFO] [stdout] 33 | |     0x48a9e2, 0x9cf043, 0x155ca30, 0x18f4783, 0x248f86c, 0x2629a64, 0x5bad752, 0x72e3569,
[INFO] [stdout] 34 | |     0x93db760, 0x97d3b37, 0x9e05670, 0xa315d5a, 0xa3571a1, 0xa48db46, 0xa7796b6, 0xac43611,
[INFO] [stdout] 35 | |     0xb64912f, 0xbb6c71e, 0xbcc8be1, 0xc38a43a, 0xd4faa99, 0xe018a66, 0xe37e49c, 0xfa975fa,
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |     0x1c05d5b0, 0x1c0b9caa,
[INFO] [stdout] 39 | | ];
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `from_hex_string`
[INFO] [stdout]   --> tests/plugins.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn from_hex_string(in_str: &str) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_mutating`
[INFO] [stdout]    --> tests/plugins.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn test_mutating(pl: &PluginLibrary, mut params: SolverParams) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_t4_genesis`
[INFO] [stdout]    --> tests/plugins.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn test_t4_genesis(pl: &PluginLibrary, mut params: SolverParams) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> tests/plugins.rs:78:33
[INFO] [stdout]    |
[INFO] [stdout] 78 |     for p in TEST_PLUGIN_LIBS_CORE.into_iter() {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> tests/plugins.rs:81:37
[INFO] [stdout]    |
[INFO] [stdout] 81 |     for p in TEST_PLUGIN_LIBS_OPTIONAL.into_iter() {
[INFO] [stdout]    |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> tests/plugins.rs:95:34
[INFO] [stdout]    |
[INFO] [stdout] 95 |         for p in TEST_PLUGIN_LIBS_CORE.into_iter() {
[INFO] [stdout]    |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]    --> tests/plugins.rs:102:38
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for p in TEST_PLUGIN_LIBS_OPTIONAL.into_iter() {
[INFO] [stdout]     |                                            ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.53s
[INFO] running `Command { std: "docker" "inspect" "fd4878ac2b7a80002a31da2df769f3d9406bcfdf52e57df6b6e1386756f989d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd4878ac2b7a80002a31da2df769f3d9406bcfdf52e57df6b6e1386756f989d6", kill_on_drop: false }`
[INFO] [stdout] fd4878ac2b7a80002a31da2df769f3d9406bcfdf52e57df6b6e1386756f989d6
