[INFO] fetching crate strscan 0.1.1...
[INFO] checking strscan-0.1.1 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate strscan 0.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate strscan 0.1.1 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate strscan 0.1.1
[INFO] finished tweaking crates.io crate strscan 0.1.1
[INFO] tweaked toml for crates.io crate strscan 0.1.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 640d27791980d0a8607abc7fe4767b825b1076469e175b6441d0154fd4435d66
[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" "640d27791980d0a8607abc7fe4767b825b1076469e175b6441d0154fd4435d66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "640d27791980d0a8607abc7fe4767b825b1076469e175b6441d0154fd4435d66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "640d27791980d0a8607abc7fe4767b825b1076469e175b6441d0154fd4435d66", kill_on_drop: false }`
[INFO] [stdout] 640d27791980d0a8607abc7fe4767b825b1076469e175b6441d0154fd4435d66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 89d7a0333d01091ee3f8a7a4b5462790e503828c7c615bc9e10220ba966bcde3
[INFO] running `Command { std: "docker" "start" "-a" "89d7a0333d01091ee3f8a7a4b5462790e503828c7c615bc9e10220ba966bcde3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking strscan v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `slice_chars` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strscan.rs:95:19
[INFO] [stdout]    |
[INFO] [stdout] 95 |         Some(rest.slice_chars(0, len))
[INFO] [stdout]    |                   ^^^^^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `slice_chars` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strscan.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let chr = rest.slice_chars(0, 1);
[INFO] [stdout]     |                        ^^^^^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strscan`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `slice_chars` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strscan.rs:95:19
[INFO] [stdout]    |
[INFO] [stdout] 95 |         Some(rest.slice_chars(0, len))
[INFO] [stdout]    |                   ^^^^^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `slice_chars` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strscan.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let chr = rest.slice_chars(0, 1);
[INFO] [stdout]     |                        ^^^^^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "89d7a0333d01091ee3f8a7a4b5462790e503828c7c615bc9e10220ba966bcde3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89d7a0333d01091ee3f8a7a4b5462790e503828c7c615bc9e10220ba966bcde3", kill_on_drop: false }`
[INFO] [stdout] 89d7a0333d01091ee3f8a7a4b5462790e503828c7c615bc9e10220ba966bcde3