[INFO] fetching crate solve_string 0.1.1...
[INFO] testing solve_string-0.1.1 against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] extracting crate solve_string 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate solve_string 0.1.1 on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate solve_string 0.1.1
[INFO] finished tweaking crates.io crate solve_string 0.1.1
[INFO] tweaked toml for crates.io crate solve_string 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", 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] cb72fe69acdf660c8d2f95988a5169d5f4b4b6fc9d894746e324226f1bb173e6
[INFO] running `Command { std: "docker" "start" "-a" "cb72fe69acdf660c8d2f95988a5169d5f4b4b6fc9d894746e324226f1bb173e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb72fe69acdf660c8d2f95988a5169d5f4b4b6fc9d894746e324226f1bb173e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb72fe69acdf660c8d2f95988a5169d5f4b4b6fc9d894746e324226f1bb173e6", kill_on_drop: false }`
[INFO] [stdout] cb72fe69acdf660c8d2f95988a5169d5f4b4b6fc9d894746e324226f1bb173e6
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df5619a58b4df27a0a7422b3d9275262173c3656a2338b09cb68c5a6f8087698
[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" "df5619a58b4df27a0a7422b3d9275262173c3656a2338b09cb68c5a6f8087698", kill_on_drop: false }`
[INFO] [stderr]    Compiling solve_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "df5619a58b4df27a0a7422b3d9275262173c3656a2338b09cb68c5a6f8087698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df5619a58b4df27a0a7422b3d9275262173c3656a2338b09cb68c5a6f8087698", kill_on_drop: false }`
[INFO] [stdout] df5619a58b4df27a0a7422b3d9275262173c3656a2338b09cb68c5a6f8087698
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9b507153a533f1befea0093aef03c814c07e46b65f9b07d52d26781accd3008
[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" "f9b507153a533f1befea0093aef03c814c07e46b65f9b07d52d26781accd3008", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling solve_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `before_letter` is never read
[INFO] [stdout]   --> src/lib.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut before_letter= "l";
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "f9b507153a533f1befea0093aef03c814c07e46b65f9b07d52d26781accd3008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9b507153a533f1befea0093aef03c814c07e46b65f9b07d52d26781accd3008", kill_on_drop: false }`
[INFO] [stdout] f9b507153a533f1befea0093aef03c814c07e46b65f9b07d52d26781accd3008
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 73666e87d65e3a46329048956c74e6bc17aae5f5506c2b7519499fbb4b6239c8
[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" "73666e87d65e3a46329048956c74e6bc17aae5f5506c2b7519499fbb4b6239c8", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `before_letter` is never read
[INFO] [stderr]   --> src/lib.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let mut before_letter= "l";
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `before_letter` is never read
[INFO] [stderr]   --> src/lib.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let mut before_letter= "l";
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/solve_string-25237d6be7a378b1
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests solve_string
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73666e87d65e3a46329048956c74e6bc17aae5f5506c2b7519499fbb4b6239c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73666e87d65e3a46329048956c74e6bc17aae5f5506c2b7519499fbb4b6239c8", kill_on_drop: false }`
[INFO] [stdout] 73666e87d65e3a46329048956c74e6bc17aae5f5506c2b7519499fbb4b6239c8