[INFO] fetching crate serde_multi 0.1.1...
[INFO] checking serde_multi-0.1.1 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate serde_multi 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate serde_multi 0.1.1 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_multi 0.1.1
[INFO] finished tweaking crates.io crate serde_multi 0.1.1
[INFO] tweaked toml for crates.io crate serde_multi 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 42dd7d00b4d0f12e9d4219a049fe6296afbcb7d3fbb4198f654f326e392d1a11
[INFO] running `Command { std: "docker" "start" "-a" "42dd7d00b4d0f12e9d4219a049fe6296afbcb7d3fbb4198f654f326e392d1a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42dd7d00b4d0f12e9d4219a049fe6296afbcb7d3fbb4198f654f326e392d1a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42dd7d00b4d0f12e9d4219a049fe6296afbcb7d3fbb4198f654f326e392d1a11", kill_on_drop: false }`
[INFO] [stdout] 42dd7d00b4d0f12e9d4219a049fe6296afbcb7d3fbb4198f654f326e392d1a11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40d8dd725a0e6f9549c365cc1789d3fcac76847aedc0849c276cd7baabeb7bdd
[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" "40d8dd725a0e6f9549c365cc1789d3fcac76847aedc0849c276cd7baabeb7bdd", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_multi v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/macros.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout] 1   | / macro_rules! implement {
[INFO] [stdout] 2   | |   ($type:ty, SerdeText) => {
[INFO] [stdout] 3   | |     impl SerdeText for $type {
[INFO] [stdout] 4   | |       #[inline]
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |   };
[INFO] [stdout] 120 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/macros.rs:122:1
[INFO] [stdout]     |
[INFO] [stdout] 122 | / macro_rules! function {
[INFO] [stdout] 123 | |   (to_string_pretty, $map_error:expr, $path:path) => {
[INFO] [stdout] 124 | |     function!(to_string_pretty, $map_error, |value| $path(value));
[INFO] [stdout] 125 | |   };
[INFO] [stdout] ...   |
[INFO] [stdout] 212 | |   };
[INFO] [stdout] 213 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/macros.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout] 1   | / macro_rules! implement {
[INFO] [stdout] 2   | |   ($type:ty, SerdeText) => {
[INFO] [stdout] 3   | |     impl SerdeText for $type {
[INFO] [stdout] 4   | |       #[inline]
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |   };
[INFO] [stdout] 120 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/macros.rs:122:1
[INFO] [stdout]     |
[INFO] [stdout] 122 | / macro_rules! function {
[INFO] [stdout] 123 | |   (to_string_pretty, $map_error:expr, $path:path) => {
[INFO] [stdout] 124 | |     function!(to_string_pretty, $map_error, |value| $path(value));
[INFO] [stdout] 125 | |   };
[INFO] [stdout] ...   |
[INFO] [stdout] 212 | |   };
[INFO] [stdout] 213 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:348:44
[INFO] [stdout]     |
[INFO] [stdout] 348 | pub fn to_string_pretty<T>(format: Format, value: &T) -> Result<String, FormatError>
[INFO] [stdout]     |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:362:37
[INFO] [stdout]     |
[INFO] [stdout] 362 | pub fn to_string<T>(format: Format, value: &T) -> Result<String, FormatError>
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/multi.rs:378:40
[INFO] [stdout]     |
[INFO] [stdout] 378 | pub fn from_str<'d, T>(format: Format, data: &'d str) -> Result<T, FormatError>
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:394:41
[INFO] [stdout]     |
[INFO] [stdout] 394 | pub fn to_vec_pretty<T>(format: Format, value: &T) -> Result<Vec<u8>, FormatError>
[INFO] [stdout]     |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:408:34
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn to_vec<T>(format: Format, value: &T) -> Result<Vec<u8>, FormatError>
[INFO] [stdout]     |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/multi.rs:430:42
[INFO] [stdout]     |
[INFO] [stdout] 430 | pub fn from_slice<'d, T>(format: Format, data: &'d [u8]) -> Result<T, FormatError>
[INFO] [stdout]     |                                          ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/multi.rs:452:47
[INFO] [stdout]     |
[INFO] [stdout] 452 | pub fn to_writer_pretty<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:452:58
[INFO] [stdout]     |
[INFO] [stdout] 452 | pub fn to_writer_pretty<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/multi.rs:466:40
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn to_writer<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:466:51
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn to_writer<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]    --> src/multi.rs:488:42
[INFO] [stdout]     |
[INFO] [stdout] 488 | pub fn from_reader<R, T>(format: Format, reader: R) -> Result<T, FormatError>
[INFO] [stdout]     |                                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `map_err`
[INFO] [stdout]   --> src/formats.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn map_err<T: std::error::Error + Send + Sync + 'static>(err: T) -> crate::Error {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:348:44
[INFO] [stdout]     |
[INFO] [stdout] 348 | pub fn to_string_pretty<T>(format: Format, value: &T) -> Result<String, FormatError>
[INFO] [stdout]     |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:362:37
[INFO] [stdout]     |
[INFO] [stdout] 362 | pub fn to_string<T>(format: Format, value: &T) -> Result<String, FormatError>
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/multi.rs:378:40
[INFO] [stdout]     |
[INFO] [stdout] 378 | pub fn from_str<'d, T>(format: Format, data: &'d str) -> Result<T, FormatError>
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:394:41
[INFO] [stdout]     |
[INFO] [stdout] 394 | pub fn to_vec_pretty<T>(format: Format, value: &T) -> Result<Vec<u8>, FormatError>
[INFO] [stdout]     |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:408:34
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn to_vec<T>(format: Format, value: &T) -> Result<Vec<u8>, FormatError>
[INFO] [stdout]     |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/multi.rs:430:42
[INFO] [stdout]     |
[INFO] [stdout] 430 | pub fn from_slice<'d, T>(format: Format, data: &'d [u8]) -> Result<T, FormatError>
[INFO] [stdout]     |                                          ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/multi.rs:452:47
[INFO] [stdout]     |
[INFO] [stdout] 452 | pub fn to_writer_pretty<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:452:58
[INFO] [stdout]     |
[INFO] [stdout] 452 | pub fn to_writer_pretty<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]    --> src/multi.rs:466:40
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn to_writer<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/multi.rs:466:51
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn to_writer<W, T>(format: Format, writer: W, value: &T) -> Result<(), FormatError>
[INFO] [stdout]     |                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]    --> src/multi.rs:488:42
[INFO] [stdout]     |
[INFO] [stdout] 488 | pub fn from_reader<R, T>(format: Format, reader: R) -> Result<T, FormatError>
[INFO] [stdout]     |                                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `map_err`
[INFO] [stdout]   --> src/formats.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn map_err<T: std::error::Error + Send + Sync + 'static>(err: T) -> crate::Error {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "40d8dd725a0e6f9549c365cc1789d3fcac76847aedc0849c276cd7baabeb7bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40d8dd725a0e6f9549c365cc1789d3fcac76847aedc0849c276cd7baabeb7bdd", kill_on_drop: false }`
[INFO] [stdout] 40d8dd725a0e6f9549c365cc1789d3fcac76847aedc0849c276cd7baabeb7bdd