[INFO] fetching crate serde_transmute 0.1.4...
[INFO] checking serde_transmute-0.1.4 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate serde_transmute 0.1.4 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate serde_transmute 0.1.4 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_transmute 0.1.4
[INFO] finished tweaking crates.io crate serde_transmute 0.1.4
[INFO] tweaked toml for crates.io crate serde_transmute 0.1.4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec89b5e93b937da1048b54c6ab503288e3e5cf83f5a8c30232d5b556146516c2
[INFO] running `Command { std: "docker" "start" "-a" "ec89b5e93b937da1048b54c6ab503288e3e5cf83f5a8c30232d5b556146516c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec89b5e93b937da1048b54c6ab503288e3e5cf83f5a8c30232d5b556146516c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec89b5e93b937da1048b54c6ab503288e3e5cf83f5a8c30232d5b556146516c2", kill_on_drop: false }`
[INFO] [stdout] ec89b5e93b937da1048b54c6ab503288e3e5cf83f5a8c30232d5b556146516c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb5a20d15a90f0c9956f80a795212b2ea4aa8d93847bad75e80ce6a9fc6dde67
[INFO] running `Command { std: "docker" "start" "-a" "bb5a20d15a90f0c9956f80a795212b2ea4aa8d93847bad75e80ce6a9fc6dde67", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_transmute v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/lib.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:52:37
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn custom<T: std::fmt::Display>(t: T) -> Self {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:59:37
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn custom<T: std::fmt::Display>(t: T) -> Self {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/lib.rs:223:9
[INFO] [stdout]     |
[INFO] [stdout] 223 |         name: &'static str,
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variants`
[INFO] [stdout]    --> src/lib.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         variants: &'static [&'static str],
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variants`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/lib.rs:483:9
[INFO] [stdout]     |
[INFO] [stdout] 483 |         len: usize,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fields`
[INFO] [stdout]    --> src/lib.rs:515:9
[INFO] [stdout]     |
[INFO] [stdout] 515 |         fields: &'static [&'static str],
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1015:9
[INFO] [stdout]      |
[INFO] [stdout] 1014 |     UnitStruct {
[INFO] [stdout]      |     ---------- field in this variant
[INFO] [stdout] 1015 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1018:9
[INFO] [stdout]      |
[INFO] [stdout] 1017 |     UnitVariant {
[INFO] [stdout]      |     ----------- field in this variant
[INFO] [stdout] 1018 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1023:9
[INFO] [stdout]      |
[INFO] [stdout] 1022 |     NewtypeStruct {
[INFO] [stdout]      |     ------------- field in this variant
[INFO] [stdout] 1023 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1027:9
[INFO] [stdout]      |
[INFO] [stdout] 1026 |     NewtypeVariant {
[INFO] [stdout]      |     -------------- field in this variant
[INFO] [stdout] 1027 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1035:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     TupleStruct {
[INFO] [stdout]      |     ----------- field in this variant
[INFO] [stdout] 1035 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1039:9
[INFO] [stdout]      |
[INFO] [stdout] 1038 |     TupleVariant {
[INFO] [stdout]      |     ------------ field in this variant
[INFO] [stdout] 1039 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1047:9
[INFO] [stdout]      |
[INFO] [stdout] 1046 |     Struct {
[INFO] [stdout]      |     ------ field in this variant
[INFO] [stdout] 1047 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1051:9
[INFO] [stdout]      |
[INFO] [stdout] 1050 |     StructVariant {
[INFO] [stdout]      |     ------------- field in this variant
[INFO] [stdout] 1051 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/lib.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:52:37
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn custom<T: std::fmt::Display>(t: T) -> Self {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:59:37
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn custom<T: std::fmt::Display>(t: T) -> Self {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/lib.rs:223:9
[INFO] [stdout]     |
[INFO] [stdout] 223 |         name: &'static str,
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variants`
[INFO] [stdout]    --> src/lib.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         variants: &'static [&'static str],
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variants`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/lib.rs:483:9
[INFO] [stdout]     |
[INFO] [stdout] 483 |         len: usize,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fields`
[INFO] [stdout]    --> src/lib.rs:515:9
[INFO] [stdout]     |
[INFO] [stdout] 515 |         fields: &'static [&'static str],
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1015:9
[INFO] [stdout]      |
[INFO] [stdout] 1014 |     UnitStruct {
[INFO] [stdout]      |     ---------- field in this variant
[INFO] [stdout] 1015 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1018:9
[INFO] [stdout]      |
[INFO] [stdout] 1017 |     UnitVariant {
[INFO] [stdout]      |     ----------- field in this variant
[INFO] [stdout] 1018 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1023:9
[INFO] [stdout]      |
[INFO] [stdout] 1022 |     NewtypeStruct {
[INFO] [stdout]      |     ------------- field in this variant
[INFO] [stdout] 1023 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1027:9
[INFO] [stdout]      |
[INFO] [stdout] 1026 |     NewtypeVariant {
[INFO] [stdout]      |     -------------- field in this variant
[INFO] [stdout] 1027 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1035:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     TupleStruct {
[INFO] [stdout]      |     ----------- field in this variant
[INFO] [stdout] 1035 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1039:9
[INFO] [stdout]      |
[INFO] [stdout] 1038 |     TupleVariant {
[INFO] [stdout]      |     ------------ field in this variant
[INFO] [stdout] 1039 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1047:9
[INFO] [stdout]      |
[INFO] [stdout] 1046 |     Struct {
[INFO] [stdout]      |     ------ field in this variant
[INFO] [stdout] 1047 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]     --> src/lib.rs:1051:9
[INFO] [stdout]      |
[INFO] [stdout] 1050 |     StructVariant {
[INFO] [stdout]      |     ------------- field in this variant
[INFO] [stdout] 1051 |         name: &'static str,
[INFO] [stdout]      |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "bb5a20d15a90f0c9956f80a795212b2ea4aa8d93847bad75e80ce6a9fc6dde67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb5a20d15a90f0c9956f80a795212b2ea4aa8d93847bad75e80ce6a9fc6dde67", kill_on_drop: false }`
[INFO] [stdout] bb5a20d15a90f0c9956f80a795212b2ea4aa8d93847bad75e80ce6a9fc6dde67