[INFO] cloning repository https://github.com/vyommani/pl0c
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vyommani/pl0c" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvyommani%2Fpl0c", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvyommani%2Fpl0c'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3d5dcfd28c7505ed726680acbaf61d8ec519c3c
[INFO] checking vyommani/pl0c against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvyommani%2Fpl0c" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vyommani/pl0c
[INFO] finished tweaking git repo https://github.com/vyommani/pl0c
[INFO] tweaked toml for git repo https://github.com/vyommani/pl0c written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vyommani/pl0c on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 36 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba7f268aff7fda12937a9d5933fb2f39c5adcd78cfb61f58a68239762febd2b3
[INFO] running `Command { std: "docker" "start" "-a" "ba7f268aff7fda12937a9d5933fb2f39c5adcd78cfb61f58a68239762febd2b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba7f268aff7fda12937a9d5933fb2f39c5adcd78cfb61f58a68239762febd2b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba7f268aff7fda12937a9d5933fb2f39c5adcd78cfb61f58a68239762febd2b3", kill_on_drop: false }`
[INFO] [stdout] ba7f268aff7fda12937a9d5933fb2f39c5adcd78cfb61f58a68239762febd2b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bce188fbfbdd87863d2fdd1d2d31045c7aa59704d5f6ac5a3a975647595c48e9
[INFO] running `Command { std: "docker" "start" "-a" "bce188fbfbdd87863d2fdd1d2d31045c7aa59704d5f6ac5a3a975647595c48e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]     Checking anstream v0.6.21
[INFO] [stderr]     Checking clap_builder v4.5.51
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling clap_derive v4.5.49
[INFO] [stderr]     Checking clap v4.5.51
[INFO] [stderr]     Checking pl0c v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Exit`
[INFO] [stdout]  --> src/codegen/statement_handlers.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ast::{ExpressionNode, Exit},
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Exit`
[INFO] [stdout]  --> src/codegen/statement_handlers.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ast::{ExpressionNode, Exit},
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/register_allocator_arm64.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{self, Write as FmtWrite};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/register_allocator_arm64.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{self, Write as FmtWrite};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/decl.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 |             if let (name, value) = tuple {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/lexer.rs:23:26
[INFO] [stdout]    |
[INFO] [stdout] 23 |             if let Some(&ch) = self.chars.peek() {
[INFO] [stdout]    |                          ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/decl.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 |             if let (name, value) = tuple {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/lexer.rs:23:26
[INFO] [stdout]    |
[INFO] [stdout] 23 |             if let Some(&ch) = self.chars.peek() {
[INFO] [stdout]    |                          ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `distance` is assigned to, but never used
[INFO] [stdout]    --> src/symboltable.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let mut distance = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_distance` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `distance` is never read
[INFO] [stdout]    --> src/symboltable.rs:178:13
[INFO] [stdout]     |
[INFO] [stdout] 178 |             distance += 1;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `target` is never read
[INFO] [stdout]    --> src/assembly_generator.rs:241:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | pub struct AssemblyGenerator {
[INFO] [stdout]     |            ----------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 241 |     target: TargetArch,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_coalesce` is never used
[INFO] [stdout]    --> src/register_allocator_arm64.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl Arm64RegisterAllocator {
[INFO] [stdout]     | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn can_coalesce(&self, v_reg: usize, other_v_reg: usize) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `distance` is assigned to, but never used
[INFO] [stdout]    --> src/symboltable.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let mut distance = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_distance` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `distance` is never read
[INFO] [stdout]    --> src/symboltable.rs:178:13
[INFO] [stdout]     |
[INFO] [stdout] 178 |             distance += 1;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/parser.rs:169:49
[INFO] [stdout]     |
[INFO] [stdout] 169 |                     SymbolLocation::StackOffset(offset.try_into().unwrap())
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `target` is never read
[INFO] [stdout]    --> src/assembly_generator.rs:241:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | pub struct AssemblyGenerator {
[INFO] [stdout]     |            ----------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 241 |     target: TargetArch,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_coalesce` is never used
[INFO] [stdout]    --> src/register_allocator_arm64.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl Arm64RegisterAllocator {
[INFO] [stdout]     | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn can_coalesce(&self, v_reg: usize, other_v_reg: usize) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/parser.rs:169:49
[INFO] [stdout]     |
[INFO] [stdout] 169 |                     SymbolLocation::StackOffset(offset.try_into().unwrap())
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pl0c` (lib) due to 1 previous error; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `pl0c` (lib test) due to 1 previous error; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "bce188fbfbdd87863d2fdd1d2d31045c7aa59704d5f6ac5a3a975647595c48e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bce188fbfbdd87863d2fdd1d2d31045c7aa59704d5f6ac5a3a975647595c48e9", kill_on_drop: false }`
[INFO] [stdout] bce188fbfbdd87863d2fdd1d2d31045c7aa59704d5f6ac5a3a975647595c48e9