[INFO] fetching crate valargs 0.1.9...
[INFO] testing valargs-0.1.9 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate valargs 0.1.9 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate valargs 0.1.9
[INFO] finished tweaking crates.io crate valargs 0.1.9
[INFO] tweaked toml for crates.io crate valargs 0.1.9 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate valargs 0.1.9 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate valargs 0.1.9 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80833fdbec333549ce295424ee7e03841c05351afbea0bca050bbb0747daf40d
[INFO] running `Command { std: "docker" "start" "-a" "80833fdbec333549ce295424ee7e03841c05351afbea0bca050bbb0747daf40d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80833fdbec333549ce295424ee7e03841c05351afbea0bca050bbb0747daf40d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80833fdbec333549ce295424ee7e03841c05351afbea0bca050bbb0747daf40d", kill_on_drop: false }`
[INFO] [stdout] 80833fdbec333549ce295424ee7e03841c05351afbea0bca050bbb0747daf40d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38b1e7798158fb2a2acee31e7f65443311b3d7c574a62ee37745f22073f659fd
[INFO] running `Command { std: "docker" "start" "-a" "38b1e7798158fb2a2acee31e7f65443311b3d7c574a62ee37745f22073f659fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling valargs v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "38b1e7798158fb2a2acee31e7f65443311b3d7c574a62ee37745f22073f659fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38b1e7798158fb2a2acee31e7f65443311b3d7c574a62ee37745f22073f659fd", kill_on_drop: false }`
[INFO] [stdout] 38b1e7798158fb2a2acee31e7f65443311b3d7c574a62ee37745f22073f659fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16f5865bd11c61edcf8767eea3e148d9ae90cb5fd93ef327945b3507e4f6a839
[INFO] running `Command { std: "docker" "start" "-a" "16f5865bd11c61edcf8767eea3e148d9ae90cb5fd93ef327945b3507e4f6a839", kill_on_drop: false }`
[INFO] [stderr]    Compiling valargs v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "16f5865bd11c61edcf8767eea3e148d9ae90cb5fd93ef327945b3507e4f6a839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16f5865bd11c61edcf8767eea3e148d9ae90cb5fd93ef327945b3507e4f6a839", kill_on_drop: false }`
[INFO] [stdout] 16f5865bd11c61edcf8767eea3e148d9ae90cb5fd93ef327945b3507e4f6a839
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 39c80f419cb8eea3e1baf154c47f805a3a481e07e661add7b1c9b5d7ef80c1d6
[INFO] running `Command { std: "docker" "start" "-a" "39c80f419cb8eea3e1baf154c47f805a3a481e07e661add7b1c9b5d7ef80c1d6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/valargs-796313191c18e77e)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::neg_number ... ok
[INFO] [stdout] test tests::parse_args ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests valargs
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - Args (line 24) ... FAILED
[INFO] [stdout] test src/lib.rs - parse (line 8) ... ok
[INFO] [stdout] test src/lib.rs - Args::nth (line 54) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Args (line 24) stdout ----
[INFO] [stdout] error[E0277]: `Option<&str>` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> src/lib.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 38 |     println!("the cat likes {} a lot", favorite_food);
[INFO] [stdout]    |                             --         ^^^^^^^^^^^^^ `Option<&str>` cannot be formatted with the default formatter
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             required by this formatting parameter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::fmt::Display` is not implemented for `Option<&str>`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Args (line 24)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.29s; merged doctests compilation took 0.10s
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "39c80f419cb8eea3e1baf154c47f805a3a481e07e661add7b1c9b5d7ef80c1d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c80f419cb8eea3e1baf154c47f805a3a481e07e661add7b1c9b5d7ef80c1d6", kill_on_drop: false }`
[INFO] [stdout] 39c80f419cb8eea3e1baf154c47f805a3a481e07e661add7b1c9b5d7ef80c1d6