[INFO] fetching crate virtual-rust 0.1.2...
[INFO] testing virtual-rust-0.1.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate virtual-rust 0.1.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate virtual-rust 0.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate virtual-rust 0.1.2
[INFO] tweaked toml for crates.io crate virtual-rust 0.1.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate virtual-rust 0.1.2 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate virtual-rust 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07648f1928a55414e9f4511c28e3bea0d6ee47de2463089b92108fa8a9a1be88
[INFO] running `Command { std: "docker" "start" "-a" "07648f1928a55414e9f4511c28e3bea0d6ee47de2463089b92108fa8a9a1be88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07648f1928a55414e9f4511c28e3bea0d6ee47de2463089b92108fa8a9a1be88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07648f1928a55414e9f4511c28e3bea0d6ee47de2463089b92108fa8a9a1be88", kill_on_drop: false }`
[INFO] [stdout] 07648f1928a55414e9f4511c28e3bea0d6ee47de2463089b92108fa8a9a1be88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57db2a9255f488a60c3cf241d53940c31aaf0b8aae0a93ccdd00e3dff5e66f78
[INFO] running `Command { std: "docker" "start" "-a" "57db2a9255f488a60c3cf241d53940c31aaf0b8aae0a93ccdd00e3dff5e66f78", kill_on_drop: false }`
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling colorchoice v1.0.4
[INFO] [stderr]    Compiling anstyle-query v1.1.5
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling clap_lex v1.0.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling anstyle-parse v0.2.7
[INFO] [stderr]    Compiling anstream v0.6.21
[INFO] [stderr]    Compiling clap_builder v4.5.60
[INFO] [stderr]    Compiling clap_derive v4.5.55
[INFO] [stderr]    Compiling clap v4.5.60
[INFO] [stderr]    Compiling virtual-rust v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.37s
[INFO] running `Command { std: "docker" "inspect" "57db2a9255f488a60c3cf241d53940c31aaf0b8aae0a93ccdd00e3dff5e66f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57db2a9255f488a60c3cf241d53940c31aaf0b8aae0a93ccdd00e3dff5e66f78", kill_on_drop: false }`
[INFO] [stdout] 57db2a9255f488a60c3cf241d53940c31aaf0b8aae0a93ccdd00e3dff5e66f78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd9177afd74ce503bb5cc79aaa49ff38d099a02e1e7e21d04234ca8d1faed530
[INFO] running `Command { std: "docker" "start" "-a" "dd9177afd74ce503bb5cc79aaa49ff38d099a02e1e7e21d04234ca8d1faed530", kill_on_drop: false }`
[INFO] [stderr]    Compiling virtual-rust v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected identifier, found reserved keyword `gen`
[INFO] [stdout]   --> examples/with_deps.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let roll: f64 = rng.gen();
[INFO] [stdout]    |                         ^^^ expected identifier, found reserved keyword
[INFO] [stdout]    |
[INFO] [stdout] help: escape `gen` to use it as an identifier
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let roll: f64 = rng.r#gen();
[INFO] [stdout]    |                         ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rand`
[INFO] [stdout]  --> examples/with_deps.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::Rng;
[INFO] [stdout]   |     ^^^^ use of unresolved module or unlinked crate `rand`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `rand`, use `cargo add rand` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `serde`
[INFO] [stdout]  --> examples/with_deps.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |     ^^^^^ use of unresolved module or unlinked crate `serde`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `serde`, use `cargo add serde` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]  --> examples/with_tokio.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[tokio::main]
[INFO] [stdout]   |   ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let (r1, r2, r3) = tokio::join!(
[INFO] [stdout]    |                        ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             tokio::time::sleep(std::time::Duration::from_millis(50)).await;
[INFO] [stdout]    |             ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> examples/features.rs:130:42
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let big = nums.iter().filter(|x| x > 3).collect();
[INFO] [stdout]     |                                          ^ expected `&&_`, found integer
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&&_`
[INFO] [stdout]                     found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0604]: only `u8` can be cast as `char`, not `{integer}`
[INFO] [stdout]   --> examples/features.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let c = a as char;
[INFO] [stdout]    |             ^^^^^^^^^ invalid cast
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `char::from_u32` instead (via a `u32`)
[INFO] [stdout]   --> examples/features.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let c = a as char;
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0604.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `virtual-rust` (example "features") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     tokio::time::sleep(std::time::Duration::from_millis(delay_ms)).await;
[INFO] [stdout]    |     ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:61:24
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let (tx, mut rx) = tokio::sync::mpsc::channel::<String>(10);
[INFO] [stdout]    |                        ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout]  5 + use std::sync::mpsc;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `mpsc`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 61 -     let (tx, mut rx) = tokio::sync::mpsc::channel::<String>(10);
[INFO] [stdout] 61 +     let (tx, mut rx) = mpsc::channel::<String>(10);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |         handles.push(tokio::spawn(async move {
[INFO] [stdout]    |                      ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `reqwest` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 |     match reqwest::get("https://httpbin.org/ip").await {
[INFO] [stdout]    |           ^^^^^^^ use of unresolved module or unlinked crate `reqwest`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `reqwest`, use `cargo add reqwest` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:63:20
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let producer = tokio::spawn(async move {
[INFO] [stdout]    |                    ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `tokio` in this scope
[INFO] [stdout]   --> examples/with_tokio.rs:69:20
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let consumer = tokio::spawn(async move {
[INFO] [stdout]    |                    ^^^^^ use of unresolved module or unlinked crate `tokio`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `tokio`, use `cargo add tokio` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0752]: `main` function is not allowed to be `async`
[INFO] [stdout]  --> examples/with_tokio.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | async fn main() {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^ `main` function is not allowed to be `async`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0752.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/algorithms.rs:61:22
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut primes = vec![];
[INFO] [stdout]    |                      ------ expected due to this value
[INFO] [stdout] ...
[INFO] [stdout] 61 |             primes = primes.push(n);
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^ expected `Vec<i64>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Vec<i64>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] note: method `push` modifies its receiver in-place
[INFO] [stdout]   --> examples/algorithms.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |             primes = primes.push(n);
[INFO] [stdout]    |                             ^^^^ this call modifies `primes` in-place
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: cannot calculate the remainder of `&&{integer}` divided by `{integer}`
[INFO] [stdout]   --> examples/algorithms.rs:98:45
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let evens = numbers.iter().filter(|x| x % 2 == 0).collect();
[INFO] [stdout]    |                                           - ^ - {integer}
[INFO] [stdout]    |                                           |
[INFO] [stdout]    |                                           &&{integer}
[INFO] [stdout]    |
[INFO] [stdout] help: `%` can be used on `&{integer}` if you dereference the left-hand side
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let evens = numbers.iter().filter(|x| *x % 2 == 0).collect();
[INFO] [stdout]    |                                           +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `virtual-rust` (example "with_tokio") due to 10 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0308, E0369.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `virtual-rust` (example "algorithms") due to 2 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `rand` in this scope
[INFO] [stdout]   --> examples/with_deps.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                   ^^^^ use of unresolved module or unlinked crate `rand`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `rand`, use `cargo add rand` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `serde_json` in this scope
[INFO] [stdout]   --> examples/with_deps.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let json = serde_json::to_string_pretty(&person).unwrap();
[INFO] [stdout]    |                ^^^^^^^^^^ use of unresolved module or unlinked crate `serde_json`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `serde_json`, use `cargo add serde_json` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `serde_json` in this scope
[INFO] [stdout]   --> examples/with_deps.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let deserialized: Person = serde_json::from_str(&json).unwrap();
[INFO] [stdout]    |                                ^^^^^^^^^^ use of unresolved module or unlinked crate `serde_json`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `serde_json`, use `cargo add serde_json` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `serde_json` in this scope
[INFO] [stdout]   --> examples/with_deps.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let j = serde_json::to_string(&p).unwrap();
[INFO] [stdout]    |                 ^^^^^^^^^^ use of unresolved module or unlinked crate `serde_json`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `serde_json`, use `cargo add serde_json` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `virtual-rust` (example "with_deps") due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "dd9177afd74ce503bb5cc79aaa49ff38d099a02e1e7e21d04234ca8d1faed530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd9177afd74ce503bb5cc79aaa49ff38d099a02e1e7e21d04234ca8d1faed530", kill_on_drop: false }`
[INFO] [stdout] dd9177afd74ce503bb5cc79aaa49ff38d099a02e1e7e21d04234ca8d1faed530
