[INFO] cloning repository https://github.com/mb64/prolog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mb64/prolog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmb64%2Fprolog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmb64%2Fprolog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ea6fda3ef18b5ce9707e0c2327ef41894c7edf3
[INFO] checking mb64/prolog against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmb64%2Fprolog" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mb64/prolog on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/mb64/prolog
[INFO] finished tweaking git repo https://github.com/mb64/prolog
[INFO] tweaked toml for git repo https://github.com/mb64/prolog written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mb64/prolog 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/mb64/scoped_map.git`
[INFO] [stderr]     Updating git repository `https://github.com/mb64/rust-typed-arena`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-segmentation v1.7.0
[INFO] [stderr]   Downloaded const-random v0.1.11
[INFO] [stderr]   Downloaded const-random-macro v0.1.11
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded dirs-next v1.0.2
[INFO] [stderr]   Downloaded rust-argon2 v0.8.2
[INFO] [stderr]   Downloaded cpu-time v1.0.0
[INFO] [stderr]   Downloaded bit-vec v0.6.2
[INFO] [stderr]   Downloaded codespan-reporting v0.9.5
[INFO] [stderr]   Downloaded logos-derive v0.11.5
[INFO] [stderr]   Downloaded lasso v0.3.1
[INFO] [stderr]   Downloaded cc v1.0.62
[INFO] [stderr]   Downloaded ahash v0.4.6
[INFO] [stderr]   Downloaded getrandom v0.2.0
[INFO] [stderr]   Downloaded ena v0.14.0
[INFO] [stderr]   Downloaded lalrpop-util v0.19.1
[INFO] [stderr]   Downloaded beef v0.4.4
[INFO] [stderr]   Downloaded logos v0.11.4
[INFO] [stderr]   Downloaded dirs-sys-next v0.1.1
[INFO] [stderr]   Downloaded lalrpop v0.19.1
[INFO] [stderr]   Downloaded rustyline v6.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b071fe2919520776379250c9a6e1980a933171d9964fb666031540d39ffcb691
[INFO] running `Command { std: "docker" "start" "-a" "b071fe2919520776379250c9a6e1980a933171d9964fb666031540d39ffcb691", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b071fe2919520776379250c9a6e1980a933171d9964fb666031540d39ffcb691", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b071fe2919520776379250c9a6e1980a933171d9964fb666031540d39ffcb691", kill_on_drop: false }`
[INFO] [stdout] b071fe2919520776379250c9a6e1980a933171d9964fb666031540d39ffcb691
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 823afe983b3de5c01e6abf4ace07d9592f5bd4d7becb099c123544148cc0a0ec
[INFO] running `Command { std: "docker" "start" "-a" "823afe983b3de5c01e6abf4ace07d9592f5bd4d7becb099c123544148cc0a0ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling const-random-macro v0.1.11
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling lalrpop-util v0.19.1
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking const-random v0.1.11
[INFO] [stderr]     Checking dirs-sys-next v0.1.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]     Checking dirs-next v1.0.2
[INFO] [stderr]     Checking ahash v0.4.6
[INFO] [stderr]     Checking typed-arena v2.0.1 (https://github.com/mb64/rust-typed-arena#43586bc0)
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking unicode-segmentation v1.7.0
[INFO] [stderr]     Checking scoped_map v0.2.0 (https://github.com/mb64/scoped_map.git?branch=main#79b67877)
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stderr]     Checking lasso v0.3.1
[INFO] [stderr]     Checking cpu-time v1.0.0
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking rustyline v6.3.0
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.19.1
[INFO] [stderr]    Compiling prolog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `mutable_borrow_reservation_conflict` has been removed: now allowed, see issue #59159 <https://github.com/rust-lang/rust/issues/59159> for more information
[INFO] [stdout]  --> src/main.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![allow(mutable_borrow_reservation_conflict)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `mutable_borrow_reservation_conflict` has been removed: now allowed, see issue #59159 <https://github.com/rust-lang/rust/issues/59159> for more information
[INFO] [stdout]  --> src/main.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![allow(mutable_borrow_reservation_conflict)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_file` is never used
[INFO] [stdout]   --> src/main.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn load_file(filename: &str, ctx: &mut Context) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[vars::VarId]` instead of cloning the inner type
[INFO] [stdout]   --> src/unify.rs:52:36
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     let args = args.clone();
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/unify.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |             drop(locals);
[INFO] [stdout]     |             ^^^^^------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `vars::LocalVars<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 111 -             drop(locals);
[INFO] [stdout] 111 +             let _ = locals;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_file` is never used
[INFO] [stdout]   --> src/main.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn load_file(filename: &str, ctx: &mut Context) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&[vars::VarId]` instead of cloning the inner type
[INFO] [stdout]   --> src/unify.rs:52:36
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     let args = args.clone();
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/unify.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |             drop(locals);
[INFO] [stdout]     |             ^^^^^------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `vars::LocalVars<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 111 -             drop(locals);
[INFO] [stdout] 111 +             let _ = locals;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.67s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: lalrpop v0.19.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "823afe983b3de5c01e6abf4ace07d9592f5bd4d7becb099c123544148cc0a0ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823afe983b3de5c01e6abf4ace07d9592f5bd4d7becb099c123544148cc0a0ec", kill_on_drop: false }`
[INFO] [stdout] 823afe983b3de5c01e6abf4ace07d9592f5bd4d7becb099c123544148cc0a0ec