[INFO] cloning repository https://github.com/alex34567/scheme-oxide
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alex34567/scheme-oxide" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex34567%2Fscheme-oxide", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex34567%2Fscheme-oxide'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c57652784a5bab9693603ec5639b3256fceef0a9
[INFO] checking alex34567/scheme-oxide against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex34567%2Fscheme-oxide" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alex34567/scheme-oxide on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alex34567/scheme-oxide
[INFO] finished tweaking git repo https://github.com/alex34567/scheme-oxide
[INFO] tweaked toml for git repo https://github.com/alex34567/scheme-oxide written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate git repo https://github.com/alex34567/scheme-oxide already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48fd8e50ecb32f808813eab3d1a6aabe3b1a53f244bff52cc78c320fd341e01c
[INFO] running `Command { std: "docker" "start" "-a" "48fd8e50ecb32f808813eab3d1a6aabe3b1a53f244bff52cc78c320fd341e01c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48fd8e50ecb32f808813eab3d1a6aabe3b1a53f244bff52cc78c320fd341e01c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48fd8e50ecb32f808813eab3d1a6aabe3b1a53f244bff52cc78c320fd341e01c", kill_on_drop: false }`
[INFO] [stdout] 48fd8e50ecb32f808813eab3d1a6aabe3b1a53f244bff52cc78c320fd341e01c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 374aaaef28be408e6fdf08bd1f7b91ff5c763e68c7ec845fbc13e8f69d1412df
[INFO] running `Command { std: "docker" "start" "-a" "374aaaef28be408e6fdf08bd1f7b91ff5c763e68c7ec845fbc13e8f69d1412df", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking scheme-oxide v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `round_to_align`
[INFO] [stdout]   --> src/gc.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn round_to_align(size: usize, align: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `traceable_size`
[INFO] [stdout]   --> src/gc.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn traceable_size<T>(obj: &GcObj<T>) -> usize
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mut_option`
[INFO] [stdout]    --> src/gc.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn mut_option(&mut self) -> Option<&mut *const GcObjHead> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ref`
[INFO] [stdout]    --> src/gc.rs:136:15
[INFO] [stdout]     |
[INFO] [stdout] 136 |     unsafe fn to_ref(&self) -> &GcObj<T> {
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `free`
[INFO] [stdout]    --> src/gc.rs:167:5
[INFO] [stdout]     |
[INFO] [stdout] 167 |     free: Cell<*mut u8>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]    --> src/gc.rs:174:5
[INFO] [stdout]     |
[INFO] [stdout] 174 |     size: unsafe fn(&GcObjHead) -> usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `mark`
[INFO] [stdout]    --> src/gc.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 |     mark: unsafe fn(&GcObjHead, &mut *const GcObjHead),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `update`
[INFO] [stdout]    --> src/gc.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |     update: unsafe fn(&GcObjHead),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vtable`
[INFO] [stdout]    --> src/gc.rs:180:5
[INFO] [stdout]     |
[INFO] [stdout] 180 |     vtable: &'static GcVtable,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downcast_ref`
[INFO] [stdout]    --> src/gc.rs:185:15
[INFO] [stdout]     |
[INFO] [stdout] 185 |     unsafe fn downcast_ref<T>(&self) -> &GcObj<T>
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downcast_ptr`
[INFO] [stdout]    --> src/gc.rs:193:8
[INFO] [stdout]     |
[INFO] [stdout] 193 |     fn downcast_ptr<T>(ptr: *const Self) -> *const GcObj<T>
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `erase_ptr`
[INFO] [stdout]    --> src/gc.rs:214:8
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn erase_ptr(ptr: *const Self) -> *const GcObjHead {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/gc.rs:220:8
[INFO] [stdout]     |
[INFO] [stdout] 220 |     fn new(heap_size: usize, root_count: usize) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `free_space`
[INFO] [stdout]    --> src/gc.rs:253:8
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn free_space(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `collect`
[INFO] [stdout]    --> src/gc.rs:257:15
[INFO] [stdout]     |
[INFO] [stdout] 257 |     unsafe fn collect(&self) {
[INFO] [stdout]     |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `put_on_heap`
[INFO] [stdout]    --> src/gc.rs:349:15
[INFO] [stdout]     |
[INFO] [stdout] 349 |     unsafe fn put_on_heap<T>(&self, new_obj: T) -> Result<RootObject<T>, ()>
[INFO] [stdout]     |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `e_type`
[INFO] [stdout]   --> src/interpreter/compiler/error.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     e_type: CompilerErrorType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]   --> src/interpreter/compiler/error.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Err(e) => panic!(e.to_string()),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Err(e) => panic!("{}", e.to_string()),
[INFO] [stdout]    |                          +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downcast_ref`
[INFO] [stdout]    --> src/gc.rs:185:15
[INFO] [stdout]     |
[INFO] [stdout] 185 |     unsafe fn downcast_ref<T>(&self) -> &GcObj<T>
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `e_type`
[INFO] [stdout]   --> src/interpreter/compiler/error.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     e_type: CompilerErrorType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `message`
[INFO] [stdout]   --> src/interpreter/compiler/error.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Err(e) => panic!(e.to_string()),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Err(e) => panic!("{}", e.to_string()),
[INFO] [stdout]    |                          +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.46s
[INFO] running `Command { std: "docker" "inspect" "374aaaef28be408e6fdf08bd1f7b91ff5c763e68c7ec845fbc13e8f69d1412df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "374aaaef28be408e6fdf08bd1f7b91ff5c763e68c7ec845fbc13e8f69d1412df", kill_on_drop: false }`
[INFO] [stdout] 374aaaef28be408e6fdf08bd1f7b91ff5c763e68c7ec845fbc13e8f69d1412df