[INFO] fetching crate ieee754 0.3.0-alpha.2...
[INFO] testing ieee754-0.3.0-alpha.2 against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] extracting crate ieee754 0.3.0-alpha.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate ieee754 0.3.0-alpha.2 on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ieee754 0.3.0-alpha.2
[INFO] finished tweaking crates.io crate ieee754 0.3.0-alpha.2
[INFO] tweaked toml for crates.io crate ieee754 0.3.0-alpha.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate ieee754 0.3.0-alpha.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c11342e2184b87bd4007946799590ecf048518b9eab0e0b6f552f4dea4eb2b9c
[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" "c11342e2184b87bd4007946799590ecf048518b9eab0e0b6f552f4dea4eb2b9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c11342e2184b87bd4007946799590ecf048518b9eab0e0b6f552f4dea4eb2b9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c11342e2184b87bd4007946799590ecf048518b9eab0e0b6f552f4dea4eb2b9c", kill_on_drop: false }`
[INFO] [stdout] c11342e2184b87bd4007946799590ecf048518b9eab0e0b6f552f4dea4eb2b9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", 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] 774227fd91343814816dc2f02dd47a414881167f185537408853d30c0ab0ad05
[INFO] running `Command { std: "docker" "start" "-a" "774227fd91343814816dc2f02dd47a414881167f185537408853d30c0ab0ad05", kill_on_drop: false }`
[INFO] [stderr]    Compiling ieee754 v0.3.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]  --> src/iter/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::ops::Try;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout]   = help: add `#![feature(try_trait_v2)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]   --> src/iter/mod.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn result_to_try<R: Try>(r: Result<R::Ok, R::Error>) -> R {
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout]    = help: add `#![feature(try_trait_v2)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]    --> src/iter/mod.rs:106:14
[INFO] [stdout]     |
[INFO] [stdout] 106 |           R: Try<Ok = B> {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout]     = help: add `#![feature(try_trait_v2)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]    --> src/iter/mod.rs:264:14
[INFO] [stdout]     |
[INFO] [stdout] 264 |           R: Try<Ok = B> {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout]     = help: add `#![feature(try_trait_v2)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]    --> src/iter/mod.rs:282:14
[INFO] [stdout]     |
[INFO] [stdout] 282 |           R: Try<Ok = B> {
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout]     = help: add `#![feature(try_trait_v2)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `R`
[INFO] [stdout]   --> src/iter/mod.rs:56:39
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn result_to_try<R: Try>(r: Result<R::Ok, R::Error>) -> R {
[INFO] [stdout]    |                                       ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Error` not found for `R`
[INFO] [stdout]   --> src/iter/mod.rs:56:46
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn result_to_try<R: Try>(r: Result<R::Ok, R::Error>) -> R {
[INFO] [stdout]    |                                              ^^^^^ associated type `Error` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `Try`
[INFO] [stdout]    --> src/iter/mod.rs:106:18
[INFO] [stdout]     |
[INFO] [stdout] 106 |           R: Try<Ok = B> {
[INFO] [stdout]     |                  ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `Try`
[INFO] [stdout]    --> src/iter/mod.rs:264:18
[INFO] [stdout]     |
[INFO] [stdout] 264 |           R: Try<Ok = B> {
[INFO] [stdout]     |                  ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `Try`
[INFO] [stdout]    --> src/iter/mod.rs:282:18
[INFO] [stdout]     |
[INFO] [stdout] 282 |           R: Try<Ok = B> {
[INFO] [stdout]     |                  ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0220, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0220`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ieee754`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "774227fd91343814816dc2f02dd47a414881167f185537408853d30c0ab0ad05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "774227fd91343814816dc2f02dd47a414881167f185537408853d30c0ab0ad05", kill_on_drop: false }`
[INFO] [stdout] 774227fd91343814816dc2f02dd47a414881167f185537408853d30c0ab0ad05