[INFO] cloning repository https://github.com/tbre90/incremental-compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tbre90/incremental-compiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbre90%2Fincremental-compiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbre90%2Fincremental-compiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b795e14b7a3d2caec014f82638ae630ff76dc921
[INFO] checking tbre90/incremental-compiler against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbre90%2Fincremental-compiler" "/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/tbre90/incremental-compiler on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tbre90/incremental-compiler
[INFO] finished tweaking git repo https://github.com/tbre90/incremental-compiler
[INFO] tweaked toml for git repo https://github.com/tbre90/incremental-compiler written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/tbre90/incremental-compiler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d7061ed92baf9c1c9f4c823c2bdd1e81ef993704b90293593f6b42524049511
[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" "0d7061ed92baf9c1c9f4c823c2bdd1e81ef993704b90293593f6b42524049511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d7061ed92baf9c1c9f4c823c2bdd1e81ef993704b90293593f6b42524049511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d7061ed92baf9c1c9f4c823c2bdd1e81ef993704b90293593f6b42524049511", kill_on_drop: false }`
[INFO] [stdout] 0d7061ed92baf9c1c9f4c823c2bdd1e81ef993704b90293593f6b42524049511
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a20fbdb9d0a89482eb1f468e5bc5b350e88fcf080933583f27907bee3a793e9f
[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" "a20fbdb9d0a89482eb1f468e5bc5b350e88fcf080933583f27907bee3a793e9f", kill_on_drop: false }`
[INFO] [stderr]     Checking compiler-course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/backend/interp.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |             _ => {
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ir/explicate.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             _ => {
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/frontend/decomplify.rs:79:33
[INFO] [stdout]    |
[INFO] [stdout] 79 |             AstNode::Prim { op, args } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `args: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/backend/interp.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |             _ => {
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ir/explicate.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             _ => {
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/frontend/decomplify.rs:79:33
[INFO] [stdout]    |
[INFO] [stdout] 79 |             AstNode::Prim { op, args } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `args: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rbp_offset`
[INFO] [stdout]   --> src/backend/x64_backend.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     rbp_offset: i64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prologue_tag`
[INFO] [stdout]   --> src/backend/x64_backend.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     prologue_tag: Rc::<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `epilogue_tag`
[INFO] [stdout]   --> src/backend/x64_backend.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     epilogue_tag: Rc::<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_rbp_offset`
[INFO] [stdout]    --> src/backend/x64_backend.rs:171:8
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn next_rbp_offset(&mut self) -> i64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rbx`
[INFO] [stdout]   --> src/backend/x64_def.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Rsp, Rbp, Rax, Rbx,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rcx`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rdx`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rsi`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rdi`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R8`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R9`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R10`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R11`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R12`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R13`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R14`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R15`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Deref`
[INFO] [stdout]   --> src/backend/x64_def.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Deref(Reg, i64),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reg`
[INFO] [stdout]   --> src/backend/x64_def.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     Reg(Reg), // a register or
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Imm`
[INFO] [stdout]   --> src/backend/x64_def.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Imm(i64), // an offset from rbp
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sub64`
[INFO] [stdout]   --> src/backend/x64_def.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Sub64(Arg, Arg),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Jmp`
[INFO] [stdout]   --> src/backend/x64_def.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Jmp(Rc<String>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_next`
[INFO] [stdout]   --> src/frontend/lexer.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn peek_next(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `previous`
[INFO] [stdout]   --> src/frontend/parser.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     previous: Token,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rewind`
[INFO] [stdout]   --> src/frontend/parser.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn rewind(&mut self, n: i64) -> Token {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryOp`
[INFO] [stdout]   --> src/ir/explicate.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     UnaryOp,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rbp_offset`
[INFO] [stdout]   --> src/backend/x64_backend.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     rbp_offset: i64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prologue_tag`
[INFO] [stdout]   --> src/backend/x64_backend.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     prologue_tag: Rc::<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `epilogue_tag`
[INFO] [stdout]   --> src/backend/x64_backend.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     epilogue_tag: Rc::<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_rbp_offset`
[INFO] [stdout]    --> src/backend/x64_backend.rs:171:8
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn next_rbp_offset(&mut self) -> i64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rbx`
[INFO] [stdout]   --> src/backend/x64_def.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Rsp, Rbp, Rax, Rbx,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rcx`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rdx`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rsi`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rdi`
[INFO] [stdout]   --> src/backend/x64_def.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Rcx, Rdx, Rsi, Rdi,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R8`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R9`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R10`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R11`
[INFO] [stdout]   --> src/backend/x64_def.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     R8, R9, R10, R11,
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R12`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R13`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R14`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `R15`
[INFO] [stdout]   --> src/backend/x64_def.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 |     R12, R13, R14, R15
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Deref`
[INFO] [stdout]   --> src/backend/x64_def.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Deref(Reg, i64),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reg`
[INFO] [stdout]   --> src/backend/x64_def.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     Reg(Reg), // a register or
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Imm`
[INFO] [stdout]   --> src/backend/x64_def.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Imm(i64), // an offset from rbp
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sub64`
[INFO] [stdout]   --> src/backend/x64_def.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Sub64(Arg, Arg),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Jmp`
[INFO] [stdout]   --> src/backend/x64_def.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Jmp(Rc<String>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_next`
[INFO] [stdout]   --> src/frontend/lexer.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn peek_next(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `previous`
[INFO] [stdout]   --> src/frontend/parser.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     previous: Token,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rewind`
[INFO] [stdout]   --> src/frontend/parser.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn rewind(&mut self, n: i64) -> Token {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryOp`
[INFO] [stdout]   --> src/ir/explicate.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     UnaryOp,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "a20fbdb9d0a89482eb1f468e5bc5b350e88fcf080933583f27907bee3a793e9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a20fbdb9d0a89482eb1f468e5bc5b350e88fcf080933583f27907bee3a793e9f", kill_on_drop: false }`
[INFO] [stdout] a20fbdb9d0a89482eb1f468e5bc5b350e88fcf080933583f27907bee3a793e9f