[INFO] cloning repository https://github.com/EgorkaZ/play-with-lalrpop [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EgorkaZ/play-with-lalrpop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEgorkaZ%2Fplay-with-lalrpop", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEgorkaZ%2Fplay-with-lalrpop'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5476050213b15ab7735c44c9bb1302567fa08399 [INFO] testing EgorkaZ/play-with-lalrpop against beta-2021-08-01 for beta-1.55-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEgorkaZ%2Fplay-with-lalrpop" "/workspace/builds/worker-5/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/EgorkaZ/play-with-lalrpop on toolchain beta-2021-08-01 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/EgorkaZ/play-with-lalrpop [INFO] finished tweaking git repo https://github.com/EgorkaZ/play-with-lalrpop [INFO] tweaked toml for git repo https://github.com/EgorkaZ/play-with-lalrpop written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/EgorkaZ/play-with-lalrpop already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 59cb79429e5878bde63838de15fc73a6cb38a6cc5abf9ddaa8217d66e8535748 [INFO] running `Command { std: "docker" "start" "-a" "59cb79429e5878bde63838de15fc73a6cb38a6cc5abf9ddaa8217d66e8535748", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "59cb79429e5878bde63838de15fc73a6cb38a6cc5abf9ddaa8217d66e8535748", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "59cb79429e5878bde63838de15fc73a6cb38a6cc5abf9ddaa8217d66e8535748", kill_on_drop: false }` [INFO] [stdout] 59cb79429e5878bde63838de15fc73a6cb38a6cc5abf9ddaa8217d66e8535748 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1aee869d96487a39c83cf2d425b708c7c1560f758a15682770e89eb0822ad653 [INFO] running `Command { std: "docker" "start" "-a" "1aee869d96487a39c83cf2d425b708c7c1560f758a15682770e89eb0822ad653", kill_on_drop: false }` [INFO] [stderr] Compiling memchr v2.4.0 [INFO] [stderr] Compiling regex-syntax v0.6.25 [INFO] [stderr] Compiling siphasher v0.3.6 [INFO] [stderr] Compiling precomputed-hash v0.1.1 [INFO] [stderr] Compiling new_debug_unreachable v1.0.4 [INFO] [stderr] Compiling bit-vec v0.6.3 [INFO] [stderr] Compiling unicode-xid v0.2.2 [INFO] [stderr] Compiling pico-args v0.4.2 [INFO] [stderr] Compiling itertools v0.10.1 [INFO] [stderr] Compiling dirs-sys-next v0.1.2 [INFO] [stderr] Compiling ena v0.14.0 [INFO] [stderr] Compiling petgraph v0.5.1 [INFO] [stderr] Compiling bit-set v0.5.2 [INFO] [stderr] Compiling dirs-next v2.0.0 [INFO] [stderr] Compiling phf_shared v0.8.0 [INFO] [stderr] Compiling term v0.7.0 [INFO] [stderr] Compiling string_cache v0.8.1 [INFO] [stderr] Compiling ascii-canvas v3.0.0 [INFO] [stderr] Compiling aho-corasick v0.7.18 [INFO] [stderr] Compiling regex v1.5.4 [INFO] [stderr] Compiling lalrpop-util v0.19.6 [INFO] [stderr] Compiling lalrpop v0.19.6 [INFO] [stderr] Compiling parsers_try v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `key` [INFO] [stdout] --> src/matcher/expr_matcher.rs:174:30 [INFO] [stdout] | [INFO] [stdout] 174 | fn substitute(&mut self, key: &char, subst: Rc) { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_key` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/matcher/helpers.rs:17:13 [INFO] [stdout] | [INFO] [stdout] 8 | fn check_substitution(&mut self, key: &Key, subst: &Rc) -> Result<(), &'_ Rc> [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 9 | { [INFO] [stdout] 10 | if let Some(found) = self.get_subst(&key) { [INFO] [stdout] | ---- immutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 14 | Err(found) [INFO] [stdout] | ---------- returning this value requires that `*self` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 17 | self.substitute(key, Rc::clone(subst)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `parsers_try` due to 2 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "1aee869d96487a39c83cf2d425b708c7c1560f758a15682770e89eb0822ad653", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1aee869d96487a39c83cf2d425b708c7c1560f758a15682770e89eb0822ad653", kill_on_drop: false }` [INFO] [stdout] 1aee869d96487a39c83cf2d425b708c7c1560f758a15682770e89eb0822ad653