[INFO] fetching crate youchoose 0.1.1...
[INFO] building youchoose-0.1.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate youchoose 0.1.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate youchoose 0.1.1
[INFO] finished tweaking crates.io crate youchoose 0.1.1
[INFO] tweaked toml for crates.io crate youchoose 0.1.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate youchoose 0.1.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate youchoose 0.1.1 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc7550784f2c47cc16ad2a4669738c9d0c2db37753948f73676cb54ffff867d4
[INFO] running `Command { std: "docker" "start" "-a" "cc7550784f2c47cc16ad2a4669738c9d0c2db37753948f73676cb54ffff867d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc7550784f2c47cc16ad2a4669738c9d0c2db37753948f73676cb54ffff867d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc7550784f2c47cc16ad2a4669738c9d0c2db37753948f73676cb54ffff867d4", kill_on_drop: false }`
[INFO] [stdout] cc7550784f2c47cc16ad2a4669738c9d0c2db37753948f73676cb54ffff867d4
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8bb81c8a2c6f90a35591b07e4228decd38b7f035860c53cdb72f944a914d1cb5
[INFO] running `Command { std: "docker" "start" "-a" "8bb81c8a2c6f90a35591b07e4228decd38b7f035860c53cdb72f944a914d1cb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]    Compiling youchoose v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:197:19
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item> {
[INFO] [stdout]     |                   ^^^^^^^^^                      ^^^^^
[INFO] [stdout]     |                   |                              ||
[INFO] [stdout]     |                   |                              |the same lifetime is hidden here
[INFO] [stdout]     |                   |                              the same lifetime is elided here
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item<'_>> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.31s
[INFO] running `Command { std: "docker" "inspect" "8bb81c8a2c6f90a35591b07e4228decd38b7f035860c53cdb72f944a914d1cb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bb81c8a2c6f90a35591b07e4228decd38b7f035860c53cdb72f944a914d1cb5", kill_on_drop: false }`
[INFO] [stdout] 8bb81c8a2c6f90a35591b07e4228decd38b7f035860c53cdb72f944a914d1cb5
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce8d33c97479cf76644fb05ac440405690706e6927b572a8d4de25738b8b7d1b
[INFO] running `Command { std: "docker" "start" "-a" "ce8d33c97479cf76644fb05ac440405690706e6927b572a8d4de25738b8b7d1b", kill_on_drop: false }`
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:197:19
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item> {
[INFO] [stdout]     |                   ^^^^^^^^^                      ^^^^^
[INFO] [stdout]     |                   |                              ||
[INFO] [stdout]     |                   |                              |the same lifetime is hidden here
[INFO] [stdout]     |                   |                              the same lifetime is elided here
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item<'_>> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling youchoose v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:197:19
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item> {
[INFO] [stdout]     |                   ^^^^^^^^^                      ^^^^^
[INFO] [stdout]     |                   |                              ||
[INFO] [stdout]     |                   |                              |the same lifetime is hidden here
[INFO] [stdout]     |                   |                              the same lifetime is elided here
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn yield_item(&mut self, i: usize) -> Option<&Item<'_>> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "ce8d33c97479cf76644fb05ac440405690706e6927b572a8d4de25738b8b7d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce8d33c97479cf76644fb05ac440405690706e6927b572a8d4de25738b8b7d1b", kill_on_drop: false }`
[INFO] [stdout] ce8d33c97479cf76644fb05ac440405690706e6927b572a8d4de25738b8b7d1b