[INFO] fetching crate slicestring 0.3.1...
[INFO] testing slicestring-0.3.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate slicestring 0.3.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate slicestring 0.3.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slicestring 0.3.1
[INFO] finished tweaking crates.io crate slicestring 0.3.1
[INFO] tweaked toml for crates.io crate slicestring 0.3.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "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] 7fbebe0731753e31bc78bb232d0ead3cd4016447336abe432693d6e682f693e2
[INFO] running `Command { std: "docker" "start" "-a" "7fbebe0731753e31bc78bb232d0ead3cd4016447336abe432693d6e682f693e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fbebe0731753e31bc78bb232d0ead3cd4016447336abe432693d6e682f693e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fbebe0731753e31bc78bb232d0ead3cd4016447336abe432693d6e682f693e2", kill_on_drop: false }`
[INFO] [stdout] 7fbebe0731753e31bc78bb232d0ead3cd4016447336abe432693d6e682f693e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d7f86acfabe27cdab417ecd9e4893791697349701fbcdd85890e0e2aaad8193
[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" "4d7f86acfabe27cdab417ecd9e4893791697349701fbcdd85890e0e2aaad8193", kill_on_drop: false }`
[INFO] [stderr]    Compiling slicestring v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut y: usize = 0;
[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: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut y: usize = 0;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4d7f86acfabe27cdab417ecd9e4893791697349701fbcdd85890e0e2aaad8193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d7f86acfabe27cdab417ecd9e4893791697349701fbcdd85890e0e2aaad8193", kill_on_drop: false }`
[INFO] [stdout] 4d7f86acfabe27cdab417ecd9e4893791697349701fbcdd85890e0e2aaad8193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a16006c37857b96ed9da62cdf49f2407ed74a974971cec0692360d2854b5a2ce
[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" "a16006c37857b96ed9da62cdf49f2407ed74a974971cec0692360d2854b5a2ce", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut y: usize = 0;
[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] [stderr]    Compiling slicestring v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut y: usize = 0;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut y: usize = 0;
[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: value assigned to `y` is never read
[INFO] [stdout]   --> src/range.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut y: usize = 0;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "a16006c37857b96ed9da62cdf49f2407ed74a974971cec0692360d2854b5a2ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a16006c37857b96ed9da62cdf49f2407ed74a974971cec0692360d2854b5a2ce", kill_on_drop: false }`
[INFO] [stdout] a16006c37857b96ed9da62cdf49f2407ed74a974971cec0692360d2854b5a2ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 701e937ca08fafd6d5a5ca8e23544f1a33cff390507dd5d8b8237164e51f1855
[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" "701e937ca08fafd6d5a5ca8e23544f1a33cff390507dd5d8b8237164e51f1855", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/range.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let mut y: usize = 0;
[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: value assigned to `y` is never read
[INFO] [stderr]   --> src/range.rs:60:17
[INFO] [stderr]    |
[INFO] [stderr] 60 |         let mut y: usize = 0;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `slicestring` (lib) generated 2 warnings
[INFO] [stderr] warning: `slicestring` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slicestring-a3d86cbb2dbf51b2)
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests slicestring
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - (line 18) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 8) ... FAILED
[INFO] [stdout] test src/lib.rs - str::slice (line 90) ... FAILED
[INFO] [stdout] test src/lib.rs - String::slice (line 60) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 35) ... ok
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 18) stdout ----
[INFO] [stdout] error[E0599]: no method named `slice` found for struct `String` in the current scope
[INFO] [stdout]  --> src/lib.rs:20:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | s = s.slice(5..);
[INFO] [stdout]   |       ^^^^^ method not found in `String`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 8) stdout ----
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/lib.rs:12:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | let mut s = "hello world!";
[INFO] [stdout]   |             -------------- expected due to this value
[INFO] [stdout] 7 | s = s.slice(..5);
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     expected `&str`, found struct `String`
[INFO] [stdout]   |     help: consider borrowing here: `&s.slice(..5)`
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 7  | s = s.slice(..5);
[INFO] [stdout]    |       ^^^^^ cannot infer type for struct `RangeTo<{integer}>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `RangeTo<{integer}>: slicestring::range::Range` found in the `slicestring` crate:
[INFO] [stdout]            - impl slicestring::range::Range for RangeTo<i32>;
[INFO] [stdout]            - impl slicestring::range::Range for RangeTo<usize>;
[INFO] [stdout] note: required by a bound in `slice`
[INFO] [stdout]   --> /opt/rustwide/workdir/src/lib.rs:51:29
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn slice(&self, r: impl range::Range) -> String;
[INFO] [stdout]    |                             ^^^^^^^^^^^^ required by this bound in `slice`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0283, E0308.
[INFO] [stdout] For more information about an error, try `rustc --explain E0283`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - str::slice (line 90) stdout ----
[INFO] [stdout] error[E0599]: no method named `slice` found for struct `String` in the current scope
[INFO] [stdout]  --> src/lib.rs:92:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | s = s.slice(..5);
[INFO] [stdout]   |       ^^^^^ method not found in `String`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - String::slice (line 60) stdout ----
[INFO] [stdout] error[E0599]: no method named `slice` found for struct `String` in the current scope
[INFO] [stdout]  --> src/lib.rs:62:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | s = s.slice(..5);
[INFO] [stdout]   |       ^^^^^ method not found in `String`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 18)
[INFO] [stdout]     src/lib.rs - (line 8)
[INFO] [stdout]     src/lib.rs - String::slice (line 60)
[INFO] [stdout]     src/lib.rs - str::slice (line 90)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.10s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "701e937ca08fafd6d5a5ca8e23544f1a33cff390507dd5d8b8237164e51f1855", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "701e937ca08fafd6d5a5ca8e23544f1a33cff390507dd5d8b8237164e51f1855", kill_on_drop: false }`
[INFO] [stdout] 701e937ca08fafd6d5a5ca8e23544f1a33cff390507dd5d8b8237164e51f1855