[INFO] fetching crate ribbon 0.7.0...
[INFO] testing ribbon-0.7.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate ribbon 0.7.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate ribbon 0.7.0
[INFO] finished tweaking crates.io crate ribbon 0.7.0
[INFO] tweaked toml for crates.io crate ribbon 0.7.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ribbon 0.7.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1602d03b17f71b650c8b252be3b0df023145be45c9a12111eb18a26d33ec681
[INFO] running `Command { std: "docker" "start" "-a" "f1602d03b17f71b650c8b252be3b0df023145be45c9a12111eb18a26d33ec681", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1602d03b17f71b650c8b252be3b0df023145be45c9a12111eb18a26d33ec681", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1602d03b17f71b650c8b252be3b0df023145be45c9a12111eb18a26d33ec681", kill_on_drop: false }`
[INFO] [stdout] f1602d03b17f71b650c8b252be3b0df023145be45c9a12111eb18a26d33ec681
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7946b89c606347840a27d62b1f8b9eb08ff45b9edebdb7b8937929a3742cbf34
[INFO] running `Command { std: "docker" "start" "-a" "7946b89c606347840a27d62b1f8b9eb08ff45b9edebdb7b8937929a3742cbf34", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "7946b89c606347840a27d62b1f8b9eb08ff45b9edebdb7b8937929a3742cbf34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7946b89c606347840a27d62b1f8b9eb08ff45b9edebdb7b8937929a3742cbf34", kill_on_drop: false }`
[INFO] [stdout] 7946b89c606347840a27d62b1f8b9eb08ff45b9edebdb7b8937929a3742cbf34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 432905b6232a80177890edd784a2342fdbbec72cb4ec71ad331a9751dffc838d
[INFO] running `Command { std: "docker" "start" "-a" "432905b6232a80177890edd784a2342fdbbec72cb4ec71ad331a9751dffc838d", kill_on_drop: false }`
[INFO] [stderr]    Compiling ribbon v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "432905b6232a80177890edd784a2342fdbbec72cb4ec71ad331a9751dffc838d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "432905b6232a80177890edd784a2342fdbbec72cb4ec71ad331a9751dffc838d", kill_on_drop: false }`
[INFO] [stdout] 432905b6232a80177890edd784a2342fdbbec72cb4ec71ad331a9751dffc838d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ec5f0118d7b0d97e2cf457c54c121d5997d33569d4a845005d17c16457b63da
[INFO] running `Command { std: "docker" "start" "-a" "6ec5f0118d7b0d97e2cf457c54c121d5997d33569d4a845005d17c16457b63da", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ribbon-3f0a1831c9dbefbe)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test band::tests::expands ... ok
[INFO] [stdout] test band::tests::len_correct ... ok
[INFO] [stdout] test band::tests::is_iterator ... ok
[INFO] [stdout] test band::tests::pops_front ... ok
[INFO] [stdout] test tape::tests::expands ... ok
[INFO] [stdout] test tape::tests::len_correct ... ok
[INFO] [stdout] test band::tests::pops_back ... ok
[INFO] [stdout] test band::tests::makes_progress ... ok
[INFO] [stdout] test band::tests::peek_back ... ok
[INFO] [stdout] test band::tests::peeks_at ... ok
[INFO] [stderr]      Running tests/mod.rs (/opt/rustwide/target/debug/deps/mod-f7d1774d387fa17b)
[INFO] [stdout] test tape::tests::is_iterator ... ok
[INFO] [stdout] test tape::tests::peeks_at ... ok
[INFO] [stdout] test tape::tests::pops_back ... ok
[INFO] [stdout] test tape::tests::pops_front ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_band ... ok
[INFO] [stdout] test test_enroll ... ok
[INFO] [stdout] test test_tape ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ribbon
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::expand (line 32) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::len (line 279) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_at (line 241) ... ok
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::expand_n (line 57) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::is_empty (line 296) ... ok
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_front (line 137) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::expand_while (line 93) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_at_mut (line 259) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::progress (line 12) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_back_mut (line 216) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_back (line 192) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::pop_back (line 173) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::peek_front_mut (line 156) ... ok
[INFO] [stdout] test src/ribbon.rs - ribbon::Ribbon::pop_front (line 119) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.75s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ec5f0118d7b0d97e2cf457c54c121d5997d33569d4a845005d17c16457b63da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ec5f0118d7b0d97e2cf457c54c121d5997d33569d4a845005d17c16457b63da", kill_on_drop: false }`
[INFO] [stdout] 6ec5f0118d7b0d97e2cf457c54c121d5997d33569d4a845005d17c16457b63da