[INFO] cloning repository https://github.com/xiaoTuiMao/rust-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xiaoTuiMao/rust-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FxiaoTuiMao%2Frust-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FxiaoTuiMao%2Frust-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0cf6db3a29d19b3f4e87199a52711c078712cc75
[INFO] testing xiaoTuiMao/rust-study against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FxiaoTuiMao%2Frust-study" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xiaoTuiMao/rust-study
[INFO] finished tweaking git repo https://github.com/xiaoTuiMao/rust-study
[INFO] tweaked toml for git repo https://github.com/xiaoTuiMao/rust-study written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xiaoTuiMao/rust-study on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xiaoTuiMao/rust-study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abfef75bd7a4160f401d99a14e56563a5eddec5ac1e268ffd2712fb12ebe741d
[INFO] running `Command { std: "docker" "start" "-a" "abfef75bd7a4160f401d99a14e56563a5eddec5ac1e268ffd2712fb12ebe741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abfef75bd7a4160f401d99a14e56563a5eddec5ac1e268ffd2712fb12ebe741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abfef75bd7a4160f401d99a14e56563a5eddec5ac1e268ffd2712fb12ebe741d", kill_on_drop: false }`
[INFO] [stdout] abfef75bd7a4160f401d99a14e56563a5eddec5ac1e268ffd2712fb12ebe741d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2716aa6e98cae1bf9fa38b30d73c9212365c0248018029a82fd77412be881975
[INFO] running `Command { std: "docker" "start" "-a" "2716aa6e98cae1bf9fa38b30d73c9212365c0248018029a82fd77412be881975", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust-study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/base_concepts.rs:49:11
[INFO] [stdout]    |
[INFO] [stdout] 49 |     tup2.1 = 2;
[INFO] [stdout]    |     ------   ^ expected `char`, found `u8`
[INFO] [stdout]    |     |
[INFO] [stdout]    |     expected due to the type of this binding
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `if` and `else` have incompatible types
[INFO] [stdout]   --> src/base_concepts.rs:60:31
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let c = if b==1 { 3 } else { 'x' };
[INFO] [stdout]    |                       -          ^^^ expected integer, found `char`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected because of this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]  --> src/base_concepts.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut y = 1;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/base_concepts.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut x = 3;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/base_concepts.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut x = 3;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-study` (bin "rust-study") due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2716aa6e98cae1bf9fa38b30d73c9212365c0248018029a82fd77412be881975", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2716aa6e98cae1bf9fa38b30d73c9212365c0248018029a82fd77412be881975", kill_on_drop: false }`
[INFO] [stdout] 2716aa6e98cae1bf9fa38b30d73c9212365c0248018029a82fd77412be881975