[INFO] fetching crate c5store 0.4.12...
[INFO] checking c5store-0.4.12 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate c5store 0.4.12 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate c5store 0.4.12
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate c5store 0.4.12
[INFO] tweaked toml for crates.io crate c5store 0.4.12 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate c5store 0.4.12 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 c5store 0.4.12 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 }`
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[INFO] [stdout] 0ce73859c3db18552c2d1d8e2ad558a7e82f5da83473f0dea6363118efb2e4c9
[INFO] running `Command { std: "docker" "start" "-a" "0ce73859c3db18552c2d1d8e2ad558a7e82f5da83473f0dea6363118efb2e4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ce73859c3db18552c2d1d8e2ad558a7e82f5da83473f0dea6363118efb2e4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ce73859c3db18552c2d1d8e2ad558a7e82f5da83473f0dea6363118efb2e4c9", kill_on_drop: false }`
[INFO] [stdout] 0ce73859c3db18552c2d1d8e2ad558a7e82f5da83473f0dea6363118efb2e4c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 08a71c3b25b826960ac3c88ab23a4c7edcc86f0cb346ce33f34483cd2dafccec
[INFO] running `Command { std: "docker" "start" "-a" "08a71c3b25b826960ac3c88ab23a4c7edcc86f0cb346ce33f34483cd2dafccec", kill_on_drop: false }`
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[INFO] [stdout] warning: unused macro definition: `deserialize_primitive_direct`
[INFO] [stdout]   --> src/c5_serde.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |   macro_rules! deserialize_primitive_direct {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::OsStr`
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use std::ffi::OsStr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `deserialize_primitive_direct`
[INFO] [stdout]   --> src/c5_serde.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |   macro_rules! deserialize_primitive_direct {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::OsStr`
[INFO] [stdout]   --> src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use std::ffi::OsStr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Deserialize`
[INFO] [stdout]  --> src/c5_serde.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |   use serde::Deserialize;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Deserialize`
[INFO] [stdout]  --> src/c5_serde.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |   use serde::Deserialize;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_data` is never used
[INFO] [stdout]    --> src/internal.rs:100:10
[INFO] [stdout]     |
[INFO] [stdout]  46 | impl C5DataStore {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |   pub fn set_data(&self, key: &str, value: C5DataValue) -> Option<C5DataValue> {
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_bytes` is never used
[INFO] [stdout]    --> src/value.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 202 | impl C5DataValue {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 220 |   pub(crate) fn as_bytes(&self) -> Option<Vec<u8>> {
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c5_value_to_serde_json` is never used
[INFO] [stdout]    --> src/value.rs:566:15
[INFO] [stdout]     |
[INFO] [stdout] 566 | pub(crate) fn c5_value_to_serde_json(
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]    --> src/c5_serde.rs:91:60
[INFO] [stdout]     |
[INFO] [stdout]  91 |           C5DataValue::Integer(i) => visitor.$visit_method((*i).try_into().map_err(|e| {
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 282 |     deserialize_integer!(deserialize_i64, visit_i64, i64);
[INFO] [stdout]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `deserialize_integer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u64, Infallible>
[INFO] [stdout]    --> src/c5_serde.rs:99:61
[INFO] [stdout]     |
[INFO] [stdout]  99 |           C5DataValue::UInteger(u) => visitor.$visit_method((*u).try_into().map_err(|e| {
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 286 |     deserialize_integer!(deserialize_u64, visit_u64, u64);
[INFO] [stdout]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `deserialize_integer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:162:15
[INFO] [stdout]     |
[INFO] [stdout] 162 |   pub fn keys(&self) -> Keys<K, HashSet<V>> {
[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] 162 |   pub fn keys(&self) -> Keys<'_, K, HashSet<V>> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:168:15
[INFO] [stdout]     |
[INFO] [stdout] 168 |   pub fn iter(&self) -> Iter<K, HashSet<V>> {
[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] 168 |   pub fn iter(&self) -> Iter<'_, K, HashSet<V>> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:174:19
[INFO] [stdout]     |
[INFO] [stdout] 174 |   pub fn iter_mut(&mut self) -> IterMut<K, HashSet<V>> {
[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] 174 |   pub fn iter_mut(&mut self) -> IterMut<'_, K, HashSet<V>> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/internal.rs:79:23
[INFO] [stdout]    |
[INFO] [stdout] 79 |   pub fn get_data_ref(&self, key: &str) -> Option<C5StoreDataValueRef> {
[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] 79 |   pub fn get_data_ref(&self, key: &str) -> Option<C5StoreDataValueRef<'_>> {
[INFO] [stdout]    |                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `c5store` (lib) due to 2 previous errors; 10 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: method `set_data` is never used
[INFO] [stdout]    --> src/internal.rs:100:10
[INFO] [stdout]     |
[INFO] [stdout]  46 | impl C5DataStore {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |   pub fn set_data(&self, key: &str, value: C5DataValue) -> Option<C5DataValue> {
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_bytes` is never used
[INFO] [stdout]    --> src/value.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 202 | impl C5DataValue {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 220 |   pub(crate) fn as_bytes(&self) -> Option<Vec<u8>> {
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c5_value_to_serde_json` is never used
[INFO] [stdout]    --> src/value.rs:566:15
[INFO] [stdout]     |
[INFO] [stdout] 566 | pub(crate) fn c5_value_to_serde_json(
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]    --> src/c5_serde.rs:91:60
[INFO] [stdout]     |
[INFO] [stdout]  91 |           C5DataValue::Integer(i) => visitor.$visit_method((*i).try_into().map_err(|e| {
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 282 |     deserialize_integer!(deserialize_i64, visit_i64, i64);
[INFO] [stdout]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `deserialize_integer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u64, Infallible>
[INFO] [stdout]    --> src/c5_serde.rs:99:61
[INFO] [stdout]     |
[INFO] [stdout]  99 |           C5DataValue::UInteger(u) => visitor.$visit_method((*u).try_into().map_err(|e| {
[INFO] [stdout]     |                                                             ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 286 |     deserialize_integer!(deserialize_u64, visit_u64, u64);
[INFO] [stdout]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `deserialize_integer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:162:15
[INFO] [stdout]     |
[INFO] [stdout] 162 |   pub fn keys(&self) -> Keys<K, HashSet<V>> {
[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] 162 |   pub fn keys(&self) -> Keys<'_, K, HashSet<V>> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:168:15
[INFO] [stdout]     |
[INFO] [stdout] 168 |   pub fn iter(&self) -> Iter<K, HashSet<V>> {
[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] 168 |   pub fn iter(&self) -> Iter<'_, K, HashSet<V>> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/data.rs:174:19
[INFO] [stdout]     |
[INFO] [stdout] 174 |   pub fn iter_mut(&mut self) -> IterMut<K, HashSet<V>> {
[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] 174 |   pub fn iter_mut(&mut self) -> IterMut<'_, K, HashSet<V>> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/internal.rs:79:23
[INFO] [stdout]    |
[INFO] [stdout] 79 |   pub fn get_data_ref(&self, key: &str) -> Option<C5StoreDataValueRef> {
[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] 79 |   pub fn get_data_ref(&self, key: &str) -> Option<C5StoreDataValueRef<'_>> {
[INFO] [stdout]    |                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `c5store` (lib test) due to 2 previous errors; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "08a71c3b25b826960ac3c88ab23a4c7edcc86f0cb346ce33f34483cd2dafccec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08a71c3b25b826960ac3c88ab23a4c7edcc86f0cb346ce33f34483cd2dafccec", kill_on_drop: false }`
[INFO] [stdout] 08a71c3b25b826960ac3c88ab23a4c7edcc86f0cb346ce33f34483cd2dafccec
