[INFO] fetching crate mahler-core 0.21.4...
[INFO] checking mahler-core-0.21.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mahler-core 0.21.4 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate mahler-core 0.21.4
[INFO] finished tweaking crates.io crate mahler-core 0.21.4
[INFO] tweaked toml for crates.io crate mahler-core 0.21.4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mahler-core 0.21.4 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] crate crates.io crate mahler-core 0.21.4 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] bd8a9a0fb8c42e2f2438aa20a70d7a7a9283eb616444030a8bc375dac4f38621
[INFO] running `Command { std: "docker" "start" "-a" "bd8a9a0fb8c42e2f2438aa20a70d7a7a9283eb616444030a8bc375dac4f38621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd8a9a0fb8c42e2f2438aa20a70d7a7a9283eb616444030a8bc375dac4f38621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd8a9a0fb8c42e2f2438aa20a70d7a7a9283eb616444030a8bc375dac4f38621", kill_on_drop: false }`
[INFO] [stdout] bd8a9a0fb8c42e2f2438aa20a70d7a7a9283eb616444030a8bc375dac4f38621
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2149eccf78d0ac62187835b988bfa325863081ae46f2caf6b4467d7ee8940252
[INFO] running `Command { std: "docker" "start" "-a" "2149eccf78d0ac62187835b988bfa325863081ae46f2caf6b4467d7ee8940252", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]     Checking regex-syntax v0.8.7
[INFO] [stderr]     Checking nu-ansi-term v0.50.3
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking thread_local v1.1.9
[INFO] [stderr]     Checking yansi v1.0.1
[INFO] [stderr]     Checking matchit v0.8.6
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking pretty_assertions v1.4.1
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]     Checking regex-automata v0.4.12
[INFO] [stderr]     Checking matchers v0.2.0
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling dedent v0.1.1
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tokio v1.47.1
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking tracing-subscriber v0.3.20
[INFO] [stderr]     Checking tokio-util v0.7.16
[INFO] [stderr]     Checking tokio-stream v0.1.17
[INFO] [stderr]     Checking jsonptr v0.7.1
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stderr]     Checking json-patch v4.1.0
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking mahler-core v0.21.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]   --> src/planner/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use tracing::{error, field, instrument, trace, trace_span, warn, Span};
[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: `error`
[INFO] [stdout]   --> src/planner/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use tracing::{error, field, instrument, trace, trace_span, warn, Span};
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/extract/args/de.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = self.url_params[0].1.parse().map_err(|_| {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     parse_single_value!(deserialize_string, visit_string, "String");
[INFO] [stdout]    |     --------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `parse_single_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/extract/args/de.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = self.url_params[0].1.parse().map_err(|_| {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |     parse_single_value!(deserialize_byte_buf, visit_string, "String");
[INFO] [stdout]    |     ----------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `parse_single_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/extract/args/de.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let v = self.value.parse().map_err(|_| {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 365 |     parse_value!(deserialize_string, visit_string, "String");
[INFO] [stdout]     |     -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `parse_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/extract/args/de.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let v = self.value.parse().map_err(|_| {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 366 |     parse_value!(deserialize_byte_buf, visit_string, "String");
[INFO] [stdout]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `parse_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mahler-core` (lib) due to 4 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/extract/args/de.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = self.url_params[0].1.parse().map_err(|_| {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     parse_single_value!(deserialize_string, visit_string, "String");
[INFO] [stdout]    |     --------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `parse_single_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/extract/args/de.rs:49:25
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = self.url_params[0].1.parse().map_err(|_| {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |     parse_single_value!(deserialize_byte_buf, visit_string, "String");
[INFO] [stdout]    |     ----------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `parse_single_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/extract/args/de.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let v = self.value.parse().map_err(|_| {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 365 |     parse_value!(deserialize_string, visit_string, "String");
[INFO] [stdout]     |     -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `parse_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/extract/args/de.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let v = self.value.parse().map_err(|_| {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 366 |     parse_value!(deserialize_byte_buf, visit_string, "String");
[INFO] [stdout]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `parse_value` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:20
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:35
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/task/effect.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 |         assert_eq!(effect.pure(), Ok(0))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]    --> src/task/mod.rs:421:42
[INFO] [stdout]     |
[INFO] [stdout] 421 |           with_io(counter, |counter| async {
[INFO] [stdout]     |  __________________________________________^
[INFO] [stdout] 422 | |             sleep(Duration::from_millis(10)).await;
[INFO] [stdout] 423 | |             Ok(counter)
[INFO] [stdout] 424 | |         })
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]    --> src/task/mod.rs:423:13
[INFO] [stdout]     |
[INFO] [stdout] 423 |             Ok(counter)
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]    --> src/worker/mod.rs:908:42
[INFO] [stdout]     |
[INFO] [stdout] 908 |           with_io(counter, |counter| async {
[INFO] [stdout]     |  __________________________________________^
[INFO] [stdout] 909 | |             sleep(Duration::from_millis(10)).await;
[INFO] [stdout] 910 | |             Ok(counter)
[INFO] [stdout] 911 | |         })
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]    --> src/worker/mod.rs:910:13
[INFO] [stdout]     |
[INFO] [stdout] 910 |             Ok(counter)
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]     --> src/worker/mod.rs:1069:46
[INFO] [stdout]      |
[INFO] [stdout] 1069 |               with_io(counter, |counter| async {
[INFO] [stdout]      |  ______________________________________________^
[INFO] [stdout] 1070 | |                 sleep(Duration::from_millis(10)).await;
[INFO] [stdout] 1071 | |                 Ok(counter)
[INFO] [stdout] 1072 | |             })
[INFO] [stdout]      | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<view::View<i32>, Infallible>
[INFO] [stdout]     --> src/worker/mod.rs:1071:17
[INFO] [stdout]      |
[INFO] [stdout] 1071 |                 Ok(counter)
[INFO] [stdout]      |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mahler-core` (lib test) due to 16 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2149eccf78d0ac62187835b988bfa325863081ae46f2caf6b4467d7ee8940252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2149eccf78d0ac62187835b988bfa325863081ae46f2caf6b4467d7ee8940252", kill_on_drop: false }`
[INFO] [stdout] 2149eccf78d0ac62187835b988bfa325863081ae46f2caf6b4467d7ee8940252
