[INFO] fetching crate sp-core 38.1.0...
[INFO] checking sp-core-38.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate sp-core 38.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate sp-core 38.1.0
[INFO] finished tweaking crates.io crate sp-core 38.1.0
[INFO] tweaked toml for crates.io crate sp-core 38.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sp-core 38.1.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sp-core 38.1.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 068cdcdcb979060582088b894ab6673a0c5e9646df739d02a9643f5b15464f2e
[INFO] running `Command { std: "docker" "start" "-a" "068cdcdcb979060582088b894ab6673a0c5e9646df739d02a9643f5b15464f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "068cdcdcb979060582088b894ab6673a0c5e9646df739d02a9643f5b15464f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "068cdcdcb979060582088b894ab6673a0c5e9646df739d02a9643f5b15464f2e", kill_on_drop: false }`
[INFO] [stdout] 068cdcdcb979060582088b894ab6673a0c5e9646df739d02a9643f5b15464f2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3ebb8c5ec06fab4805691a908e5b74ac955f3acdaf7ceee59406743db85fd70
[INFO] running `Command { std: "docker" "start" "-a" "e3ebb8c5ec06fab4805691a908e5b74ac955f3acdaf7ceee59406743db85fd70", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tracing-attributes v0.1.27
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[INFO] [stderr]     Checking futures-executor v0.3.31
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[INFO] [stderr]     Checking scale-info v2.11.6
[INFO] [stderr]     Checking ecdsa v0.16.8
[INFO] [stderr]     Checking impl-codec v0.7.1
[INFO] [stderr]     Checking sp-storage v22.0.0
[INFO] [stderr]     Checking substrate-bip39 v0.6.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling ss58-registry v1.43.0
[INFO] [stderr]     Checking sp-externalities v0.30.0
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Checking k256 v0.13.4
[INFO] [stderr]     Checking primitive-types v0.13.1
[INFO] [stderr]     Checking bounded-collections v0.3.2
[INFO] [stderr]     Checking sp-core v38.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/lib.rs:522:6
[INFO] [stdout]     |
[INFO] [stdout] 522 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Secret<std::string::String>, Infallible>
[INFO] [stdout]    --> src/crypto.rs:816:12
[INFO] [stdout]     |
[INFO] [stdout] 816 |             phrase: SecretString::from_str(phrase).expect("Returns infallible error; qed"),
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Secret<std::string::String>, Infallible>
[INFO] [stdout]    --> src/crypto.rs:819:14
[INFO] [stdout]     |
[INFO] [stdout] 819 |                 .map(|v| SecretString::from_str(v).expect("Returns infallible error; qed")),
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:61:24
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>>;
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>>;
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:77:24
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/traits.rs:114:24
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]     |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sp-core` (lib) due to 2 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Secret<std::string::String>, Infallible>
[INFO] [stdout]    --> src/crypto.rs:816:12
[INFO] [stdout]     |
[INFO] [stdout] 816 |             phrase: SecretString::from_str(phrase).expect("Returns infallible error; qed"),
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Secret<std::string::String>, Infallible>
[INFO] [stdout]    --> src/crypto.rs:819:14
[INFO] [stdout]     |
[INFO] [stdout] 819 |                 .map(|v| SecretString::from_str(v).expect("Returns infallible error; qed")),
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:61:24
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>>;
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>>;
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/traits.rs:77:24
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]    |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/traits.rs:114:24
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn fetch_runtime_code(&self) -> Option<Cow<[u8]>> {
[INFO] [stdout]     |                           ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn fetch_runtime_code(&self) -> Option<Cow<'_, [u8]>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sp-core` (lib test) due to 2 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e3ebb8c5ec06fab4805691a908e5b74ac955f3acdaf7ceee59406743db85fd70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3ebb8c5ec06fab4805691a908e5b74ac955f3acdaf7ceee59406743db85fd70", kill_on_drop: false }`
[INFO] [stdout] e3ebb8c5ec06fab4805691a908e5b74ac955f3acdaf7ceee59406743db85fd70
