[INFO] cloning repository https://github.com/Takamichi-tsutsumi/monkey-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Takamichi-tsutsumi/monkey-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTakamichi-tsutsumi%2Fmonkey-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTakamichi-tsutsumi%2Fmonkey-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e463a22618dca1dd8de1cbe4eaf50d6d62bde58
[INFO] checking Takamichi-tsutsumi/monkey-rust against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTakamichi-tsutsumi%2Fmonkey-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Takamichi-tsutsumi/monkey-rust on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Takamichi-tsutsumi/monkey-rust
[INFO] finished tweaking git repo https://github.com/Takamichi-tsutsumi/monkey-rust
[INFO] tweaked toml for git repo https://github.com/Takamichi-tsutsumi/monkey-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Takamichi-tsutsumi/monkey-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79c937f608359f3716481e47410bb2c18d616a53f9aa40cad21333fb0a4558c4
[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" "79c937f608359f3716481e47410bb2c18d616a53f9aa40cad21333fb0a4558c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79c937f608359f3716481e47410bb2c18d616a53f9aa40cad21333fb0a4558c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79c937f608359f3716481e47410bb2c18d616a53f9aa40cad21333fb0a4558c4", kill_on_drop: false }`
[INFO] [stdout] 79c937f608359f3716481e47410bb2c18d616a53f9aa40cad21333fb0a4558c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 616ada6dca3f12e920336355edb26495a7680606e5227b137bf0ac63f30db59c
[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" "616ada6dca3f12e920336355edb26495a7680606e5227b137bf0ac63f30db59c", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the type `String` cannot be indexed by `usize`
[INFO] [stdout]   --> lib/lexer.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 |             self.chr = self.input[self.read_position];
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `String` cannot be indexed by `usize`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Index<usize>` is not implemented for `String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `monkey`
[INFO] [stdout] error[E0277]: the type `String` cannot be indexed by `usize`
[INFO] [stdout]   --> lib/lexer.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 |             self.chr = self.input[self.read_position];
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `String` cannot be indexed by `usize`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Index<usize>` is not implemented for `String`
[INFO] [stdout] 
[INFO] [stdout] 
[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: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "616ada6dca3f12e920336355edb26495a7680606e5227b137bf0ac63f30db59c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "616ada6dca3f12e920336355edb26495a7680606e5227b137bf0ac63f30db59c", kill_on_drop: false }`
[INFO] [stdout] 616ada6dca3f12e920336355edb26495a7680606e5227b137bf0ac63f30db59c