[INFO] fetching crate rant 4.0.0-alpha.6...
[INFO] checking rant-4.0.0-alpha.6 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate rant 4.0.0-alpha.6 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rant 4.0.0-alpha.6 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rant 4.0.0-alpha.6
[INFO] finished tweaking crates.io crate rant 4.0.0-alpha.6
[INFO] tweaked toml for crates.io crate rant 4.0.0-alpha.6 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate rant 4.0.0-alpha.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cervine v0.0.6
[INFO] [stderr]   Downloaded codemap-diagnostic v0.1.1
[INFO] [stderr]   Downloaded embedded-triple v0.1.0
[INFO] [stderr]   Downloaded line-col v0.2.1
[INFO] [stderr]   Downloaded quickscope v0.1.3
[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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df6128623c1c68eb66dbf093d5b007be28c04c26b25890c1398f5c92f6c7fb12
[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" "df6128623c1c68eb66dbf093d5b007be28c04c26b25890c1398f5c92f6c7fb12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df6128623c1c68eb66dbf093d5b007be28c04c26b25890c1398f5c92f6c7fb12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df6128623c1c68eb66dbf093d5b007be28c04c26b25890c1398f5c92f6c7fb12", kill_on_drop: false }`
[INFO] [stdout] df6128623c1c68eb66dbf093d5b007be28c04c26b25890c1398f5c92f6c7fb12
[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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 721eaddb7f3ea72c950dde2e38376bfaba6aceaff6432a66cd16b8f75726b0ef
[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" "721eaddb7f3ea72c950dde2e38376bfaba6aceaff6432a66cd16b8f75726b0ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]     Checking cervine v0.0.6
[INFO] [stderr]     Checking line-col v0.2.1
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]     Checking smartstring v0.2.4
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking quickscope v0.1.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking rant v4.0.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/runtime/output.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     match &self.format.ws_norm_mode {
[INFO] [stdout]    |            ----------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 60 |         self.write_frag(val.to_string().as_str())
[INFO] [stdout]    |         ^^^^            --- immutable borrow later used here
[INFO] [stdout]    |         |
[INFO] [stdout]    |         mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/runtime/output.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     match &self.format.ws_norm_mode {
[INFO] [stdout]    |            ----------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 60 |         self.write_frag(val.to_string().as_str())
[INFO] [stdout]    |         ^^^^            --- immutable borrow later used here
[INFO] [stdout]    |         |
[INFO] [stdout]    |         mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.33s
[INFO] running `Command { std: "docker" "inspect" "721eaddb7f3ea72c950dde2e38376bfaba6aceaff6432a66cd16b8f75726b0ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "721eaddb7f3ea72c950dde2e38376bfaba6aceaff6432a66cd16b8f75726b0ef", kill_on_drop: false }`
[INFO] [stdout] 721eaddb7f3ea72c950dde2e38376bfaba6aceaff6432a66cd16b8f75726b0ef