[INFO] cloning repository https://github.com/sjbaker47/rust-nslookup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjbaker47/rust-nslookup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjbaker47%2Frust-nslookup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjbaker47%2Frust-nslookup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ae35cc62e1c2401b077b320cb2d3404b02b40cb
[INFO] checking sjbaker47/rust-nslookup against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjbaker47%2Frust-nslookup" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjbaker47/rust-nslookup on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sjbaker47/rust-nslookup
[INFO] finished tweaking git repo https://github.com/sjbaker47/rust-nslookup
[INFO] tweaked toml for git repo https://github.com/sjbaker47/rust-nslookup written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/sjbaker47/rust-nslookup already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6c35f61c7f8db0021cd73d4fcbb85b5dbaf2cf3f6128441541e2f2bef998dbf
[INFO] running `Command { std: "docker" "start" "-a" "f6c35f61c7f8db0021cd73d4fcbb85b5dbaf2cf3f6128441541e2f2bef998dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6c35f61c7f8db0021cd73d4fcbb85b5dbaf2cf3f6128441541e2f2bef998dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c35f61c7f8db0021cd73d4fcbb85b5dbaf2cf3f6128441541e2f2bef998dbf", kill_on_drop: false }`
[INFO] [stdout] f6c35f61c7f8db0021cd73d4fcbb85b5dbaf2cf3f6128441541e2f2bef998dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26b5d571b446e1ad8e77774588fab5df27d25127d6230d726005b70c9195993e
[INFO] running `Command { std: "docker" "start" "-a" "26b5d571b446e1ad8e77774588fab5df27d25127d6230d726005b70c9195993e", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.18
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking nslookup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `decode_name` in this scope
[INFO] [stdout]    --> src/protocol/name.rs:101:19
[INFO] [stdout]     |
[INFO] [stdout] 37  | pub fn encode_name(name : &str) -> Vec<u8> {
[INFO] [stdout]     | ------------------------------------------ similarly named function `encode_name` defined here
[INFO] [stdout] ...
[INFO] [stdout] 101 |     let decoded = decode_name(&buf);
[INFO] [stdout]     |                   ^^^^^^^^^^^ help: a function with a similar name exists: `encode_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `decode_name` in this scope
[INFO] [stdout]    --> src/protocol/name.rs:106:19
[INFO] [stdout]     |
[INFO] [stdout] 37  | pub fn encode_name(name : &str) -> Vec<u8> {
[INFO] [stdout]     | ------------------------------------------ similarly named function `encode_name` defined here
[INFO] [stdout] ...
[INFO] [stdout] 106 |     let decoded = decode_name(&buf);
[INFO] [stdout]     |                   ^^^^^^^^^^^ help: a function with a similar name exists: `encode_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Cursor`
[INFO] [stdout]    --> src/protocol/name.rs:114:40
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let decoded = decode_name_rdr(&mut Cursor::new(&buf)).unwrap();
[INFO] [stdout]     |                                        ^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   | use protocol::Cursor;
[INFO] [stdout]     |
[INFO] [stdout] 1   | use std::collections::linked_list::Cursor;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Cursor`
[INFO] [stdout]    --> src/protocol/name.rs:119:40
[INFO] [stdout]     |
[INFO] [stdout] 119 |     let decoded = decode_name_rdr(&mut Cursor::new(&buf)).unwrap();
[INFO] [stdout]     |                                        ^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 1   | use protocol::Cursor;
[INFO] [stdout]     |
[INFO] [stdout] 1   | use std::collections::linked_list::Cursor;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/protocol/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:21:54
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn run(hostname : String) -> Result<DnsResponse, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[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: unused import: `std::str`
[INFO] [stdout]  --> src/protocol/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:21:54
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn run(hostname : String) -> Result<DnsResponse, Box<Error>> {
[INFO] [stdout]    |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[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: unused variable: `i`
[INFO] [stdout]    --> src/protocol/mod.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |         for i in 0..nquestions {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/protocol/mod.rs:166:13
[INFO] [stdout]     |
[INFO] [stdout] 166 |         for i in 0..nanswers {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nslookup` due to 5 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field is never read: `header`
[INFO] [stdout]   --> src/protocol/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     header: DnsHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `questions`
[INFO] [stdout]   --> src/protocol/mod.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     questions: Vec<ResponseQuestion>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/protocol/mod.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     name: NameRef,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `qtype`
[INFO] [stdout]   --> src/protocol/mod.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     qtype: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `qclass`
[INFO] [stdout]   --> src/protocol/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     qclass: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `header`
[INFO] [stdout]   --> src/protocol/mod.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     header: RecordHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/protocol/mod.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     name: NameRef,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rr_class`
[INFO] [stdout]   --> src/protocol/mod.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     rr_class: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ttl`
[INFO] [stdout]   --> src/protocol/mod.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     ttl: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "26b5d571b446e1ad8e77774588fab5df27d25127d6230d726005b70c9195993e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26b5d571b446e1ad8e77774588fab5df27d25127d6230d726005b70c9195993e", kill_on_drop: false }`
[INFO] [stdout] 26b5d571b446e1ad8e77774588fab5df27d25127d6230d726005b70c9195993e