[INFO] fetching crate stun_codec 0.4.0...
[INFO] checking stun_codec-0.4.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate stun_codec 0.4.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate stun_codec 0.4.0
[INFO] finished tweaking crates.io crate stun_codec 0.4.0
[INFO] tweaked toml for crates.io crate stun_codec 0.4.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stun_codec 0.4.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stun_codec 0.4.0 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fea114f809e9ea4e9b09b66f61b833712095f29f675cc20816d6fb17cfd843b
[INFO] running `Command { std: "docker" "start" "-a" "8fea114f809e9ea4e9b09b66f61b833712095f29f675cc20816d6fb17cfd843b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fea114f809e9ea4e9b09b66f61b833712095f29f675cc20816d6fb17cfd843b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fea114f809e9ea4e9b09b66f61b833712095f29f675cc20816d6fb17cfd843b", kill_on_drop: false }`
[INFO] [stdout] 8fea114f809e9ea4e9b09b66f61b833712095f29f675cc20816d6fb17cfd843b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f12d7d056a8cb8ae856cfc925b4f140139431e18748d1583cb2805442815c7e
[INFO] running `Command { std: "docker" "start" "-a" "2f12d7d056a8cb8ae856cfc925b4f140139431e18748d1583cb2805442815c7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking subtle v2.6.1
[INFO] [stderr]     Checking cpufeatures v0.2.17
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking crc v3.2.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]    Compiling trackable_derive v1.0.0
[INFO] [stderr]     Checking trackable v1.3.0
[INFO] [stderr]     Checking bytecodec v0.5.0
[INFO] [stderr]     Checking stun_codec v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Rfc5389` and `Rfc5766` are never constructed
[INFO] [stdout]   --> src/attribute.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum MyAttribute {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 12 |     Rfc5389(rfc5389::Attribute),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 13 |     Rfc5766(rfc5766::Attribute),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MyAttribute` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyAttributeDecoder` is never constructed
[INFO] [stdout]   --> src/attribute.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct MyAttributeDecoder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyAttributeEncoder` is never constructed
[INFO] [stdout]   --> src/attribute.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct MyAttributeEncoder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Rfc5389` and `Rfc5766` are never constructed
[INFO] [stdout]   --> src/attribute.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum MyAttribute {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 12 |     Rfc5389(rfc5389::Attribute),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 13 |     Rfc5766(rfc5766::Attribute),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MyAttribute` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyAttributeDecoder` is never constructed
[INFO] [stdout]   --> src/attribute.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct MyAttributeDecoder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyAttributeEncoder` is never constructed
[INFO] [stdout]   --> src/attribute.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct MyAttributeEncoder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.48s
[INFO] running `Command { std: "docker" "inspect" "2f12d7d056a8cb8ae856cfc925b4f140139431e18748d1583cb2805442815c7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f12d7d056a8cb8ae856cfc925b4f140139431e18748d1583cb2805442815c7e", kill_on_drop: false }`
[INFO] [stdout] 2f12d7d056a8cb8ae856cfc925b4f140139431e18748d1583cb2805442815c7e