[INFO] updating cached repository https://github.com/NicholasLYang/saber [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] c7dc9f4baa6454056bbe57bf0706f9182bf0961a [INFO] checking NicholasLYang/saber against nightly-2019-10-27 for pr-65897 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicholasLYang%2Fsaber" "/workspace/builds/worker-0/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/NicholasLYang/saber on toolchain nightly-2019-10-27 [INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/NicholasLYang/saber [INFO] finished tweaking git repo https://github.com/NicholasLYang/saber [INFO] tweaked toml for git repo https://github.com/NicholasLYang/saber written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/NicholasLYang/saber already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 85a15a4aac17e73937eadefb4c590b2b0077ab84c6434785289bbd71ae7992e9 [INFO] running `"docker" "start" "-a" "85a15a4aac17e73937eadefb4c590b2b0077ab84c6434785289bbd71ae7992e9"` [INFO] [stderr] Compiling cc v1.0.22 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Compiling im v13.0.0 [INFO] [stderr] Compiling syn v0.15.15 [INFO] [stderr] Checking sized-chunks v0.3.1 [INFO] [stderr] Compiling backtrace-sys v0.1.24 [INFO] [stderr] Checking backtrace v0.3.9 [INFO] [stderr] Compiling synstructure v0.10.1 [INFO] [stderr] Compiling strum_macros v0.13.0 [INFO] [stderr] Compiling failure_derive v0.1.5 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Checking saber v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:313:17 [INFO] [stderr] | [INFO] [stderr] 313 | self.ctx.insert(name.clone(), type_var.clone()); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:400:32 [INFO] [stderr] | [INFO] [stderr] 400 | let var_type = self.ctx.remove(name); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:403:21 [INFO] [stderr] | [INFO] [stderr] 403 | self.ctx.insert(name.to_string(), t1); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:406:21 [INFO] [stderr] | [INFO] [stderr] 406 | self.ctx.insert(name.clone(), Arc::new(t2.clone())); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error: aborting due to 4 previous errors [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0596`. [INFO] [stderr] error: could not compile `saber`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:313:17 [INFO] [stderr] | [INFO] [stderr] 313 | self.ctx.insert(name.clone(), type_var.clone()); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:400:32 [INFO] [stderr] | [INFO] [stderr] 400 | let var_type = self.ctx.remove(name); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:403:21 [INFO] [stderr] | [INFO] [stderr] 403 | self.ctx.insert(name.to_string(), t1); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error[E0596]: cannot borrow data in an `Arc` as mutable [INFO] [stderr] --> src/typechecker.rs:406:21 [INFO] [stderr] | [INFO] [stderr] 406 | self.ctx.insert(name.clone(), Arc::new(t2.clone())); [INFO] [stderr] | ^^^^^^^^ cannot borrow as mutable [INFO] [stderr] | [INFO] [stderr] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::sync::Arc>>` [INFO] [stderr] [INFO] [stderr] error: aborting due to 4 previous errors [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0596`. [INFO] [stderr] error: could not compile `saber`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "85a15a4aac17e73937eadefb4c590b2b0077ab84c6434785289bbd71ae7992e9"` [INFO] running `"docker" "rm" "-f" "85a15a4aac17e73937eadefb4c590b2b0077ab84c6434785289bbd71ae7992e9"` [INFO] [stdout] 85a15a4aac17e73937eadefb4c590b2b0077ab84c6434785289bbd71ae7992e9