[INFO] cloning repository https://github.com/HenrySwanson/rust-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HenrySwanson/rust-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2bf584c412e77b9496f605ee2f45f9cb3715f10
[INFO] testing HenrySwanson/rust-lox against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HenrySwanson/rust-lox on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HenrySwanson/rust-lox
[INFO] finished tweaking git repo https://github.com/HenrySwanson/rust-lox
[INFO] tweaked toml for git repo https://github.com/HenrySwanson/rust-lox written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/HenrySwanson/rust-lox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23cae0d810c7792a807c79fb98804f17b53cdaff646189d960c3a62e04de6dd0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "23cae0d810c7792a807c79fb98804f17b53cdaff646189d960c3a62e04de6dd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23cae0d810c7792a807c79fb98804f17b53cdaff646189d960c3a62e04de6dd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23cae0d810c7792a807c79fb98804f17b53cdaff646189d960c3a62e04de6dd0", kill_on_drop: false }`
[INFO] [stdout] 23cae0d810c7792a807c79fb98804f17b53cdaff646189d960c3a62e04de6dd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d94e552adb1e5112b1117d1becbea440bce461f1d6d78f10361dea6207cda4a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7d94e552adb1e5112b1117d1becbea440bce461f1d6d78f10361dea6207cda4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]    Compiling num_enum v0.5.1
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 171 |             RichOpcode::Constant(idx) => print_with_constant!("OP_CONSTANT", idx),
[INFO] [stdout]     |                                          ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 188 |             RichOpcode::DefineGlobal(idx) => print_with_constant!("OP_DEFINE_GLOBAL", idx),
[INFO] [stdout]     |                                              --------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 189 |             RichOpcode::GetGlobal(idx) => print_with_constant!("OP_GET_GLOBAL", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 190 |             RichOpcode::SetGlobal(idx) => print_with_constant!("OP_SET_GLOBAL", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 191 |             RichOpcode::GetLocal(idx) => print_two!("OP_GET_LOCAL", idx),
[INFO] [stdout]     |                                          ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 192 |             RichOpcode::SetLocal(idx) => print_two!("OP_SET_LOCAL", idx),
[INFO] [stdout]     |                                          ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 194 |             RichOpcode::Jump(distance) => print_two!("OP_JUMP", distance),
[INFO] [stdout]     |                                           ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 195 |             RichOpcode::JumpIfFalse(distance) => print_two!("OP_JUMP_IF_FALSE", distance),
[INFO] [stdout]     |                                                  ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 196 |             RichOpcode::Loop(distance) => print_two!("OP_LOOP", distance),
[INFO] [stdout]     |                                           ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 217 |             RichOpcode::GetUpvalue(idx) => print_two!("OP_GET_UPVALUE", idx),
[INFO] [stdout]     |                                            --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 218 |             RichOpcode::SetUpvalue(idx) => print_two!("OP_SET_UPVALUE", idx),
[INFO] [stdout]     |                                            --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 221 |             RichOpcode::MakeClass(idx) => print_with_constant!("OP_MAKE_CLASS", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 222 |             RichOpcode::GetProperty(idx) => print_with_constant!("OP_GET_PROPERTY", idx),
[INFO] [stdout]     |                                             -------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 223 |             RichOpcode::SetProperty(idx) => print_with_constant!("OP_SET_PROPERTY", idx),
[INFO] [stdout]     |                                             -------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 224 |             RichOpcode::MakeMethod(idx) => print_with_constant!("OP_MAKE_METHOD", idx),
[INFO] [stdout]     |                                            ------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 230 |             RichOpcode::GetSuper(idx) => print_with_constant!("OP_GET_SUPER", idx),
[INFO] [stdout]     |                                          ----------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 236 |             RichOpcode::Call(argc) => print_two!("OP_CALL", argc),
[INFO] [stdout]     |                                       --------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_u8`
[INFO] [stdout]   --> src/bytecode/chunk.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn write_u8(&mut self, byte: u8, line_no: usize) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_u8`
[INFO] [stdout]   --> src/bytecode/chunk.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn read_u8(&self, idx: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_u16`
[INFO] [stdout]    --> src/bytecode/chunk.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |     pub fn read_u16(&self, idx: usize) -> u16 {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `disassemble`
[INFO] [stdout]    --> src/bytecode/chunk.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn disassemble(&self, name: &str) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `disassemble_at`
[INFO] [stdout]    --> src/bytecode/chunk.rs:133:12
[INFO] [stdout]     |
[INFO] [stdout] 133 |     pub fn disassemble_at(&self, offset: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_CONSTANTS`
[INFO] [stdout]  --> src/bytecode/opcode.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub const MAX_CONSTANTS: usize = 256;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/bytecode/string_interning.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn insert<K>(&mut self, key: K)
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/bytecode/string_interning.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]    --> src/frontend/lexer.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |     pub fn iter(self) -> LexerIterator<'src> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `source`
[INFO] [stdout]  --> src/frontend/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     source: &'a str,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.11s
[INFO] running `Command { std: "docker" "inspect" "7d94e552adb1e5112b1117d1becbea440bce461f1d6d78f10361dea6207cda4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d94e552adb1e5112b1117d1becbea440bce461f1d6d78f10361dea6207cda4a", kill_on_drop: false }`
[INFO] [stdout] 7d94e552adb1e5112b1117d1becbea440bce461f1d6d78f10361dea6207cda4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1d6bdb5b9369e6d7d92215449b0b5cd3c6260712c156a6222b44c9106097aa87
[INFO] running `Command { std: "docker" "start" "-a" "1d6bdb5b9369e6d7d92215449b0b5cd3c6260712c156a6222b44c9106097aa87", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `common` in the crate root
[INFO] [stdout]    --> src/frontend/lexer.rs:214:16
[INFO] [stdout]     |
[INFO] [stdout] 214 |     use crate::common::span::CodePosition;
[INFO] [stdout]     |                ^^^^^^ could not find `common` in the crate root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `common` in the crate root
[INFO] [stdout]    --> src/frontend/parser.rs:532:16
[INFO] [stdout]     |
[INFO] [stdout] 532 |     use crate::common::ast::Expr;
[INFO] [stdout]     |                ^^^^^^ could not find `common` in the crate root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Expr` in this scope
[INFO] [stdout]    --> src/frontend/parser.rs:536:46
[INFO] [stdout]     |
[INFO] [stdout] 536 |         fn parse_expression(source: &str) -> Expr {
[INFO] [stdout]     |                                              ^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 531 |     use crate::ast::Expr;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 171 |             RichOpcode::Constant(idx) => print_with_constant!("OP_CONSTANT", idx),
[INFO] [stdout]     |                                          ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 188 |             RichOpcode::DefineGlobal(idx) => print_with_constant!("OP_DEFINE_GLOBAL", idx),
[INFO] [stdout]     |                                              --------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 189 |             RichOpcode::GetGlobal(idx) => print_with_constant!("OP_GET_GLOBAL", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 190 |             RichOpcode::SetGlobal(idx) => print_with_constant!("OP_SET_GLOBAL", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 191 |             RichOpcode::GetLocal(idx) => print_two!("OP_GET_LOCAL", idx),
[INFO] [stdout]     |                                          ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 192 |             RichOpcode::SetLocal(idx) => print_two!("OP_SET_LOCAL", idx),
[INFO] [stdout]     |                                          ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 194 |             RichOpcode::Jump(distance) => print_two!("OP_JUMP", distance),
[INFO] [stdout]     |                                           ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 195 |             RichOpcode::JumpIfFalse(distance) => print_two!("OP_JUMP_IF_FALSE", distance),
[INFO] [stdout]     |                                                  ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 196 |             RichOpcode::Loop(distance) => print_two!("OP_LOOP", distance),
[INFO] [stdout]     |                                           ------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 217 |             RichOpcode::GetUpvalue(idx) => print_two!("OP_GET_UPVALUE", idx),
[INFO] [stdout]     |                                            --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 218 |             RichOpcode::SetUpvalue(idx) => print_two!("OP_SET_UPVALUE", idx),
[INFO] [stdout]     |                                            --------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 221 |             RichOpcode::MakeClass(idx) => print_with_constant!("OP_MAKE_CLASS", idx),
[INFO] [stdout]     |                                           ------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 222 |             RichOpcode::GetProperty(idx) => print_with_constant!("OP_GET_PROPERTY", idx),
[INFO] [stdout]     |                                             -------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 223 |             RichOpcode::SetProperty(idx) => print_with_constant!("OP_SET_PROPERTY", idx),
[INFO] [stdout]     |                                             -------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 224 |             RichOpcode::MakeMethod(idx) => print_with_constant!("OP_MAKE_METHOD", idx),
[INFO] [stdout]     |                                            ------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:166:14
[INFO] [stdout]     |
[INFO] [stdout] 166 |             };};
[INFO] [stdout]     |              ^
[INFO] [stdout] ...
[INFO] [stdout] 230 |             RichOpcode::GetSuper(idx) => print_with_constant!("OP_GET_SUPER", idx),
[INFO] [stdout]     |                                          ----------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_with_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/bytecode/chunk.rs:152:52
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 println!("{:20} {:4}", $op, $first);
[INFO] [stdout]     |                                                    ^
[INFO] [stdout] ...
[INFO] [stdout] 236 |             RichOpcode::Call(argc) => print_two!("OP_CALL", argc),
[INFO] [stdout]     |                                       --------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `print_two` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Span`
[INFO] [stdout]    --> src/frontend/lexer.rs:213:24
[INFO] [stdout]     |
[INFO] [stdout] 213 |     use super::{Lexer, Span, SpannedToken, Token};
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-lox` due to 4 previous errors; 18 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1d6bdb5b9369e6d7d92215449b0b5cd3c6260712c156a6222b44c9106097aa87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d6bdb5b9369e6d7d92215449b0b5cd3c6260712c156a6222b44c9106097aa87", kill_on_drop: false }`
[INFO] [stdout] 1d6bdb5b9369e6d7d92215449b0b5cd3c6260712c156a6222b44c9106097aa87