[INFO] fetching crate fnerror 0.1.4...
[INFO] testing fnerror-0.1.4 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate fnerror 0.1.4 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate fnerror 0.1.4
[INFO] finished tweaking crates.io crate fnerror 0.1.4
[INFO] tweaked toml for crates.io crate fnerror 0.1.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fnerror 0.1.4 on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fnerror 0.1.4 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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10bb46c281889c2f0027dd488b0b38e24c5e745616b628b7c7e574b222254178
[INFO] running `Command { std: "docker" "start" "-a" "10bb46c281889c2f0027dd488b0b38e24c5e745616b628b7c7e574b222254178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10bb46c281889c2f0027dd488b0b38e24c5e745616b628b7c7e574b222254178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10bb46c281889c2f0027dd488b0b38e24c5e745616b628b7c7e574b222254178", kill_on_drop: false }`
[INFO] [stdout] 10bb46c281889c2f0027dd488b0b38e24c5e745616b628b7c7e574b222254178
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38e324379fe781f54b8890c88d5565f4d6b9d668f5bbcd8620f14e1a584b5216
[INFO] running `Command { std: "docker" "start" "-a" "38e324379fe781f54b8890c88d5565f4d6b9d668f5bbcd8620f14e1a584b5216", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling fnerror v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.31s
[INFO] running `Command { std: "docker" "inspect" "38e324379fe781f54b8890c88d5565f4d6b9d668f5bbcd8620f14e1a584b5216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e324379fe781f54b8890c88d5565f4d6b9d668f5bbcd8620f14e1a584b5216", kill_on_drop: false }`
[INFO] [stdout] 38e324379fe781f54b8890c88d5565f4d6b9d668f5bbcd8620f14e1a584b5216
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 568f5adf28cfcfe5c5eeb3b44ce70797c7afd807da5b38be1848227145ef2a45
[INFO] running `Command { std: "docker" "start" "-a" "568f5adf28cfcfe5c5eeb3b44ce70797c7afd807da5b38be1848227145ef2a45", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnerror v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "568f5adf28cfcfe5c5eeb3b44ce70797c7afd807da5b38be1848227145ef2a45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "568f5adf28cfcfe5c5eeb3b44ce70797c7afd807da5b38be1848227145ef2a45", kill_on_drop: false }`
[INFO] [stdout] 568f5adf28cfcfe5c5eeb3b44ce70797c7afd807da5b38be1848227145ef2a45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5785aed890a75cd01c68bd6542e2f0e6001715572ac3f4131ac7f6c16d62a6a0
[INFO] running `Command { std: "docker" "start" "-a" "5785aed890a75cd01c68bd6542e2f0e6001715572ac3f4131ac7f6c16d62a6a0", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/fnerror-3a969c4696106622)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests fnerror
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - fnerror (line 22) ... FAILED
[INFO] [stdout] test src/lib.rs - fnerror (line 47) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - fnerror (line 22) stdout ----
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]   --> src/lib.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         #[fnerr]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]    = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-14; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]   --> src/lib.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         #[fnerr]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]    = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-14; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fnerror` in this scope
[INFO] [stdout]   --> src/lib.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 24 | #[fnerror]
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `fnerror` is imported here, but it is a crate, not an attribute
[INFO] [stdout]   --> src/lib.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | extern crate r#fnerror;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider importing this attribute macro
[INFO] [stdout]    |
[INFO] [stdout] 21 + use fnerror::fnerror;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fnerr` in this scope
[INFO] [stdout]   --> src/lib.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |         #[fnerr]
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fnerr` in this scope
[INFO] [stdout]   --> src/lib.rs:31:11
[INFO] [stdout]    |
[INFO] [stdout] 31 |         #[fnerr]
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `MyError` in this scope
[INFO] [stdout]   --> src/lib.rs:25:24
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn foo() -> Result<(), MyError> {
[INFO] [stdout]    |                        ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn foo<MyError>() -> Result<(), MyError> {
[INFO] [stdout]    |       +++++++++
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Error2` in this scope
[INFO] [stdout]   --> src/lib.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Error2("{}", e as String)
[INFO] [stdout]    |         ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Error3` in this scope
[INFO] [stdout]   --> src/lib.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         Error3("{}, {}", e as &'static str, 123 as u8)
[INFO] [stdout]    |         ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0658.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - fnerror (line 47) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: could not find `thiserror` in the list of imported crates
[INFO] [stdout]   --> src/lib.rs:53:19
[INFO] [stdout]    |
[INFO] [stdout] 53 | #[derive(Debug, ::thiserror::Error)]
[INFO] [stdout]    |                   ^^^^^^^^^ could not find `thiserror` in the list of imported crates
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]   --> src/lib.rs:55:7
[INFO] [stdout]    |
[INFO] [stdout] 55 |     #[error("{}", 0usize)]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `error` in this scope
[INFO] [stdout]   --> src/lib.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 |     #[error("{}, {}",0usize, 1usize)]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `bar` in this scope
[INFO] [stdout]   --> src/lib.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     bar().map_err(|e| MyError::Error2(e))?;
[INFO] [stdout]    |     ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `baz` in this scope
[INFO] [stdout]   --> src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     baz().map_err(|e| MyError::Error3(e, 123))?;
[INFO] [stdout]    |     ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - fnerror (line 22)
[INFO] [stdout]     src/lib.rs - fnerror (line 47)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.14s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.30s; merged doctests compilation took 0.16s
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "5785aed890a75cd01c68bd6542e2f0e6001715572ac3f4131ac7f6c16d62a6a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5785aed890a75cd01c68bd6542e2f0e6001715572ac3f4131ac7f6c16d62a6a0", kill_on_drop: false }`
[INFO] [stdout] 5785aed890a75cd01c68bd6542e2f0e6001715572ac3f4131ac7f6c16d62a6a0
