[INFO] fetching crate mail-core 0.6.2...
[INFO] checking mail-core-0.6.2 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate mail-core 0.6.2 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate mail-core 0.6.2 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mail-core 0.6.2
[INFO] finished tweaking crates.io crate mail-core 0.6.2
[INFO] tweaked toml for crates.io crate mail-core 0.6.2 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d88a08e24111d48072aee3b9aeaf003597724fe821389cb91644d39def9477c
[INFO] running `Command { std: "docker" "start" "-a" "0d88a08e24111d48072aee3b9aeaf003597724fe821389cb91644d39def9477c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d88a08e24111d48072aee3b9aeaf003597724fe821389cb91644d39def9477c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d88a08e24111d48072aee3b9aeaf003597724fe821389cb91644d39def9477c", kill_on_drop: false }`
[INFO] [stdout] 0d88a08e24111d48072aee3b9aeaf003597724fe821389cb91644d39def9477c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d131ad5afcbed3a9b510e569f4ecdcbec8f7e879d49d8c3ee316bb6cdc9cce14
[INFO] running `Command { std: "docker" "start" "-a" "d131ad5afcbed3a9b510e569f4ecdcbec8f7e879d49d8c3ee316bb6cdc9cce14", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling cc v1.0.71
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking quoted-string v0.6.1
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking quoted_printable v0.4.3
[INFO] [stderr]     Checking vec1 v1.8.0
[INFO] [stderr]     Checking vec-drain-where v1.0.1
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[INFO] [stderr]     Checking soft-ascii-string v1.1.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]    Compiling serde_json v1.0.68
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[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-integer v0.1.44
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[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]     Checking unicode-normalization v0.1.19
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[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking mail-internals v0.2.3
[INFO] [stderr]     Checking mail-headers v0.6.6
[INFO] [stderr]     Checking mail-core v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:78:32
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:13:36
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub type SendBoxFuture<I, E> = Box<Future<Item=I, Error=E> + Send + 'static>;
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Future<Item=I, Error=E> + Send + 'static`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:78:32
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/utils.rs:13:36
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub type SendBoxFuture<I, E> = Box<Future<Item=I, Error=E> + Send + 'static>;
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Future<Item=I, Error=E> + Send + 'static`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/mail.rs:600:17
[INFO] [stdout]     |
[INFO] [stdout] 600 |             let mut headers: &mut HeaderMap = headers;
[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/mail.rs:600:17
[INFO] [stdout]     |
[INFO] [stdout] 600 |             let mut headers: &mut HeaderMap = headers;
[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: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource/loading.rs:184:21
[INFO] [stdout]     |
[INFO] [stdout] 184 |                     mem::replace(resource_ref, new_resource.to_resource());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:466:21
[INFO] [stdout]     |
[INFO] [stdout] 466 | /                     mem::replace(
[INFO] [stdout] 467 | |                         &mut self.inner,
[INFO] [stdout] 468 | |                         InnerMailFuture::Loading {
[INFO] [stdout] 469 | |                             mail, ctx,
[INFO] [stdout] 470 | |                             pending: future::join_all(futures)
[INFO] [stdout] 471 | |                         }
[INFO] [stdout] 472 | |                     );
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:478:29
[INFO] [stdout]     |
[INFO] [stdout] 478 | / ...                   mem::replace(
[INFO] [stdout] 479 | | ...                       &mut self.inner,
[INFO] [stdout] 480 | | ...                       InnerMailFuture::Loading { mail, pending, ctx }
[INFO] [stdout] 481 | | ...                   );
[INFO] [stdout]     | |________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:554:9
[INFO] [stdout]     |
[INFO] [stdout] 554 |         mem::replace(resource, Resource::EncData(enc_data));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource/loading.rs:184:21
[INFO] [stdout]     |
[INFO] [stdout] 184 |                     mem::replace(resource_ref, new_resource.to_resource());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:466:21
[INFO] [stdout]     |
[INFO] [stdout] 466 | /                     mem::replace(
[INFO] [stdout] 467 | |                         &mut self.inner,
[INFO] [stdout] 468 | |                         InnerMailFuture::Loading {
[INFO] [stdout] 469 | |                             mail, ctx,
[INFO] [stdout] 470 | |                             pending: future::join_all(futures)
[INFO] [stdout] 471 | |                         }
[INFO] [stdout] 472 | |                     );
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:478:29
[INFO] [stdout]     |
[INFO] [stdout] 478 | / ...                   mem::replace(
[INFO] [stdout] 479 | | ...                       &mut self.inner,
[INFO] [stdout] 480 | | ...                       InnerMailFuture::Loading { mail, pending, ctx }
[INFO] [stdout] 481 | | ...                   );
[INFO] [stdout]     | |________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/mail.rs:554:9
[INFO] [stdout]     |
[INFO] [stdout] 554 |         mem::replace(resource, Resource::EncData(enc_data));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.25s
[INFO] running `Command { std: "docker" "inspect" "d131ad5afcbed3a9b510e569f4ecdcbec8f7e879d49d8c3ee316bb6cdc9cce14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d131ad5afcbed3a9b510e569f4ecdcbec8f7e879d49d8c3ee316bb6cdc9cce14", kill_on_drop: false }`
[INFO] [stdout] d131ad5afcbed3a9b510e569f4ecdcbec8f7e879d49d8c3ee316bb6cdc9cce14
