[INFO] fetching crate rustdns 0.1.0...
[INFO] testing rustdns-0.1.0 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate rustdns 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rustdns 0.1.0 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustdns 0.1.0
[INFO] finished tweaking crates.io crate rustdns 0.1.0
[INFO] tweaked toml for crates.io crate rustdns 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate rustdns 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72085d555a4d0ef2a6b2e1928062108aa2102135f3c46cc5216e869fb19ab41a
[INFO] running `Command { std: "docker" "start" "-a" "72085d555a4d0ef2a6b2e1928062108aa2102135f3c46cc5216e869fb19ab41a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72085d555a4d0ef2a6b2e1928062108aa2102135f3c46cc5216e869fb19ab41a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72085d555a4d0ef2a6b2e1928062108aa2102135f3c46cc5216e869fb19ab41a", kill_on_drop: false }`
[INFO] [stdout] 72085d555a4d0ef2a6b2e1928062108aa2102135f3c46cc5216e869fb19ab41a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79be7d89e2afe99555101a69d4d171716683273e57cbad48850a46db250fefb6
[INFO] running `Command { std: "docker" "start" "-a" "79be7d89e2afe99555101a69d4d171716683273e57cbad48850a46db250fefb6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling strum v0.21.0
[INFO] [stderr]    Compiling encoding8 v0.3.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.18
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling rustdns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'cursor_remaining'
[INFO] [stdout]   --> src/dns.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |         if self.cur.remaining()? > 0 {
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #86369 <https://github.com/rust-lang/rust/issues/86369> for more information
[INFO] [stdout]    = help: add `#![feature(cursor_remaining)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> src/dns.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |         if self.cur.remaining()? > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `u64`
[INFO] [stdout]    = note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'cursor_remaining'
[INFO] [stdout]   --> src/dns.rs:77:26
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 self.cur.remaining()?
[INFO] [stdout]    |                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #86369 <https://github.com/rust-lang/rust/issues/86369> for more information
[INFO] [stdout]    = help: add `#![feature(cursor_remaining)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> src/dns.rs:77:17
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 self.cur.remaining()?
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `u64`
[INFO] [stdout]    = note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'cursor_remaining'
[INFO] [stdout]   --> src/resource.rs:79:19
[INFO] [stdout]    |
[INFO] [stdout] 79 |         if record.remaining()? > 0 {
[INFO] [stdout]    |                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #86369 <https://github.com/rust-lang/rust/issues/86369> for more information
[INFO] [stdout]    = help: add `#![feature(cursor_remaining)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> src/resource.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |         if record.remaining()? > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `u64`
[INFO] [stdout]    = note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'cursor_remaining'
[INFO] [stdout]   --> src/resource.rs:84:24
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 record.remaining()?
[INFO] [stdout]    |                        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #86369 <https://github.com/rust-lang/rust/issues/86369> for more information
[INFO] [stdout]    = help: add `#![feature(cursor_remaining)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]   --> src/resource.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 record.remaining()?
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `u64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `u64`
[INFO] [stdout]    = note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SeekExt`
[INFO] [stdout]  --> src/dns.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::io::{DNSReadExt, SeekExt};
[INFO] [stdout]   |                             ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SeekExt`
[INFO] [stdout]  --> src/resource.rs:2:40
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::io::{CursorExt, DNSReadExt, SeekExt};
[INFO] [stdout]   |                                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustdns`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "79be7d89e2afe99555101a69d4d171716683273e57cbad48850a46db250fefb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79be7d89e2afe99555101a69d4d171716683273e57cbad48850a46db250fefb6", kill_on_drop: false }`
[INFO] [stdout] 79be7d89e2afe99555101a69d4d171716683273e57cbad48850a46db250fefb6