[INFO] fetching crate alt-failure 0.1.5...
[INFO] checking alt-failure-0.1.5 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate alt-failure 0.1.5 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate alt-failure 0.1.5 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alt-failure 0.1.5
[INFO] finished tweaking crates.io crate alt-failure 0.1.5
[INFO] tweaked toml for crates.io crate alt-failure 0.1.5 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate alt-failure 0.1.5 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" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded failure_derive v0.1.5
[INFO] [stderr]   Downloaded rustc-demangle v0.1.16
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded synstructure v0.10.2
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded cfg-if v0.1.9
[INFO] [stderr]   Downloaded backtrace v0.3.37
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] [stderr]   Downloaded libc v0.2.62
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2995105455af8ffebe01d705a5002fee2c78e7cddd4f30e532086535ef03cfb6
[INFO] running `Command { std: "docker" "start" "-a" "2995105455af8ffebe01d705a5002fee2c78e7cddd4f30e532086535ef03cfb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2995105455af8ffebe01d705a5002fee2c78e7cddd4f30e532086535ef03cfb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2995105455af8ffebe01d705a5002fee2c78e7cddd4f30e532086535ef03cfb6", kill_on_drop: false }`
[INFO] [stdout] 2995105455af8ffebe01d705a5002fee2c78e7cddd4f30e532086535ef03cfb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9afe6388248289bcee6c049f2b1a28dcd9d3af8c2e77f28159afd924373a0dd9
[INFO] running `Command { std: "docker" "start" "-a" "9afe6388248289bcee6c049f2b1a28dcd9d3af8c2e77f28159afd924373a0dd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking alt-failure v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> examples/string_custom_error_pattern.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> examples/simple.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> examples/bail_ensure.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> tests/fail_compat.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> tests/macro_trailing_comma.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> tests/basic_fail.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `failure`
[INFO] [stdout]  --> examples/error_as_cause.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate failure;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]  --> examples/error_as_cause.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[fail(display = "my wrapping error")]
[INFO] [stdout]   |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]  --> examples/error_as_cause.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct WrappingError(#[fail(cause)] Error);
[INFO] [stdout]   |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]  --> examples/simple.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[fail(display = "my error")]
[INFO] [stdout]   |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `bail` in this scope
[INFO] [stdout]  --> examples/bail_ensure.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     bail!("ruh {}", "roh");
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]  --> tests/basic_fail.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |     #[fail(display = "my error")]
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]   --> examples/simple.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[fail(display = "my wrapping error")]
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> examples/bail_ensure.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     ensure!(true, "true is false");
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]   --> examples/simple.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct WrappingError(#[fail(cause)] MyError);
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> examples/bail_ensure.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     ensure!(false, "false is false");
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `fail` in this scope
[INFO] [stdout]  --> tests/fail_compat.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[fail(display = "my error")]
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (example "string_custom_error_pattern") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `format_err` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         format_err!("test {}", 4).to_string(),
[INFO] [stdout]    |         ^^^^^^^^^^ help: a macro with a similar name exists: `format_args`
[INFO] [stdout]   --> /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/macros/mod.rs:1030:5
[INFO] [stdout]    |
[INFO] [stdout]    = note: similarly named macro `format_args` defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `format_err` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `format_err` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         format_err!("test {}", 4,).to_string());
[INFO] [stdout]    |         ^^^^^^^^^^ help: a macro with a similar name exists: `format_args`
[INFO] [stdout]   --> /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/macros/mod.rs:1030:5
[INFO] [stdout]    |
[INFO] [stdout]    = note: similarly named macro `format_args` defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `format_err` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `format_err` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         format_err!("test",).to_string());
[INFO] [stdout]    |         ^^^^^^^^^^ help: a macro with a similar name exists: `format_args`
[INFO] [stdout]   --> /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/macros/mod.rs:1030:5
[INFO] [stdout]    |
[INFO] [stdout]    = note: similarly named macro `format_args` defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `format_err` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `format_err` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         format_err!("test").to_string(),
[INFO] [stdout]    |         ^^^^^^^^^^ help: a macro with a similar name exists: `format_args`
[INFO] [stdout]   --> /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/macros/mod.rs:1030:5
[INFO] [stdout]    |
[INFO] [stdout]    = note: similarly named macro `format_args` defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `format_err` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:55:28
[INFO] [stdout]    |
[INFO] [stdout] 55 |         wrap_early_return!(ensure!(4 == 5)),
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (example "bail_ensure") due to 4 previous errors
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:52:28
[INFO] [stdout]    |
[INFO] [stdout] 52 |         wrap_early_return!(ensure!(true == false)),
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (example "error_as_cause") due to 3 previous errors
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 |         wrap_early_return!(ensure!(false)),
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:43:28
[INFO] [stdout]    |
[INFO] [stdout] 43 |         wrap_early_return!(ensure!(false, "test {}", 4,)));
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:42:28
[INFO] [stdout]    |
[INFO] [stdout] 42 |         wrap_early_return!(ensure!(false, "test {}", 4)),
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:40:28
[INFO] [stdout]    |
[INFO] [stdout] 40 |         wrap_early_return!(ensure!(false, "test",)));
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `ensure` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:39:28
[INFO] [stdout]    |
[INFO] [stdout] 39 |         wrap_early_return!(ensure!(false, "test")),
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ensure` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `bail` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:33:28
[INFO] [stdout]    |
[INFO] [stdout] 33 |         wrap_early_return!(bail!("test {}", 4,)));
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `bail` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `bail` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:32:28
[INFO] [stdout]    |
[INFO] [stdout] 32 |         wrap_early_return!(bail!("test {}", 4)),
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `bail` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `bail` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:30:28
[INFO] [stdout]    |
[INFO] [stdout] 30 |         wrap_early_return!(bail!("test",)));
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `bail` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (example "simple") due to 4 previous errors
[INFO] [stdout] error: cannot find macro `bail` in this scope
[INFO] [stdout]   --> tests/macro_trailing_comma.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 |         wrap_early_return!(bail!("test")),
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `bail` is in scope, but it is a function, not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `MyError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> tests/basic_fail.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct MyError;
[INFO] [stdout]    |     -------------- method `to_string` not found for this struct because it doesn't satisfy `MyError: ToString` or `MyError: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 14 |     assert_eq!(err.to_string(), "my error");
[INFO] [stdout]    |                    ^^^^^^^^^ `MyError` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `MyError: std::fmt::Display`
[INFO] [stdout]            which is required by `MyError: ToString`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/fmt/mod.rs:727:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `name` found for struct `MyError` in the current scope
[INFO] [stdout]   --> tests/basic_fail.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct MyError;
[INFO] [stdout]    |     -------------- method `name` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     assert_eq!(err.name(), Some("basic_fail::MyError"));
[INFO] [stdout]    |                    ^^^^ method not found in `MyError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (test "fail_compat") due to 2 previous errors
[INFO] [stdout] error[E0599]: no method named `context` found for struct `MyError` in the current scope
[INFO] [stdout]   --> tests/basic_fail.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct MyError;
[INFO] [stdout]    |     -------------- method `context` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     let ctx = err.context("whatever");
[INFO] [stdout]    |                   ^^^^^^^ method not found in `MyError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (test "basic_fail") due to 5 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt-failure` (test "macro_trailing_comma") due to 16 previous errors
[INFO] running `Command { std: "docker" "inspect" "9afe6388248289bcee6c049f2b1a28dcd9d3af8c2e77f28159afd924373a0dd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9afe6388248289bcee6c049f2b1a28dcd9d3af8c2e77f28159afd924373a0dd9", kill_on_drop: false }`
[INFO] [stdout] 9afe6388248289bcee6c049f2b1a28dcd9d3af8c2e77f28159afd924373a0dd9