[INFO] updating cached repository syunta/Scheme-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/syunta/Scheme-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/syunta/Scheme-rs" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/syunta/Scheme-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/syunta/Scheme-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/syunta/Scheme-rs" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/syunta/Scheme-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/syunta/Scheme-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7028d38a4a6210d18b2643971953d2e744ba596
[INFO] sha for GitHub repo syunta/Scheme-rs: e7028d38a4a6210d18b2643971953d2e744ba596
[INFO] validating manifest of syunta/Scheme-rs on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of syunta/Scheme-rs on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing syunta/Scheme-rs
[INFO] finished frobbing syunta/Scheme-rs
[INFO] frobbed toml for syunta/Scheme-rs written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/syunta/Scheme-rs/Cargo.toml
[INFO] started frobbing syunta/Scheme-rs
[INFO] finished frobbing syunta/Scheme-rs
[INFO] frobbed toml for syunta/Scheme-rs written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/syunta/Scheme-rs/Cargo.toml
[INFO] crate syunta/Scheme-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking syunta/Scheme-rs against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-2/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/syunta/Scheme-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 349f479995300d0f51678117377c3e5eb1f237e345d4905c9e4ae8fb86354128
[INFO] running `"docker" "start" "-a" "349f479995300d0f51678117377c3e5eb1f237e345d4905c9e4ae8fb86354128"`
[INFO] [stderr]     Checking scheme-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/data.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/data.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/data.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/data.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cdr`
[INFO] [stderr]   --> src/memory.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn cons(car: Obj, cdr: Obj) -> Obj {
[INFO] [stderr]    |                   ^^^ help: consider prefixing with an underscore: `_cdr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/memory.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut mem = Memory { cars: HashMap::new(), cdrs: HashMap::new() };
[INFO] [stderr]   |         ----^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0133]: use of mutable static is unsafe and requires unsafe function or block
[INFO] [stderr]   --> src/memory.rs:19:38
[INFO] [stderr]    |
[INFO] [stderr] 19 |         mem.borrow_mut().cars.insert(FREE_PTR, car);
[INFO] [stderr]    |                                      ^^^^^^^^ use of mutable static
[INFO] [stderr]    |
[INFO] [stderr]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0133`.
[INFO] [stderr] error: Could not compile `scheme-rs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `cdr`
[INFO] [stderr]   --> src/memory.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn cons(car: Obj, cdr: Obj) -> Obj {
[INFO] [stderr]    |                   ^^^ help: consider prefixing with an underscore: `_cdr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/memory.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut mem = Memory { cars: HashMap::new(), cdrs: HashMap::new() };
[INFO] [stderr]   |         ----^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0133]: use of mutable static is unsafe and requires unsafe function or block
[INFO] [stderr]   --> src/memory.rs:19:38
[INFO] [stderr]    |
[INFO] [stderr] 19 |         mem.borrow_mut().cars.insert(FREE_PTR, car);
[INFO] [stderr]    |                                      ^^^^^^^^ use of mutable static
[INFO] [stderr]    |
[INFO] [stderr]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0133`.
[INFO] [stderr] error: Could not compile `scheme-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "349f479995300d0f51678117377c3e5eb1f237e345d4905c9e4ae8fb86354128"`
[INFO] running `"docker" "rm" "-f" "349f479995300d0f51678117377c3e5eb1f237e345d4905c9e4ae8fb86354128"`
[INFO] [stdout] 349f479995300d0f51678117377c3e5eb1f237e345d4905c9e4ae8fb86354128