[INFO] fetching crate fixed_len_str_example 0.2.5...
[INFO] testing fixed_len_str_example-0.2.5 against 1.90.0 for beta-1.91-3
[INFO] extracting crate fixed_len_str_example 0.2.5 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate fixed_len_str_example 0.2.5
[INFO] finished tweaking crates.io crate fixed_len_str_example 0.2.5
[INFO] tweaked toml for crates.io crate fixed_len_str_example 0.2.5 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fixed_len_str_example 0.2.5 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixed_len_str v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18b1b37b565f00f9742b7278406047aba3a8178f5720106f5e784da0b41e9ea4
[INFO] running `Command { std: "docker" "start" "-a" "18b1b37b565f00f9742b7278406047aba3a8178f5720106f5e784da0b41e9ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18b1b37b565f00f9742b7278406047aba3a8178f5720106f5e784da0b41e9ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18b1b37b565f00f9742b7278406047aba3a8178f5720106f5e784da0b41e9ea4", kill_on_drop: false }`
[INFO] [stdout] 18b1b37b565f00f9742b7278406047aba3a8178f5720106f5e784da0b41e9ea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] beb8c20982058c00d7bf95618b303b5b65aae807b9bb5802e0126be167c1ec23
[INFO] running `Command { std: "docker" "start" "-a" "beb8c20982058c00d7bf95618b303b5b65aae807b9bb5802e0126be167c1ec23", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_len_str v0.3.3
[INFO] [stderr]    Compiling fixed_len_str_example v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(pattern)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 lifetime arguments but 1 lifetime argument was supplied
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | fixed_len_str!(12);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ expected 0 lifetime arguments
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `fixed_len_str` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: missing generics for associated type `core::str::pattern::Pattern::Searcher`
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | fixed_len_str!(12);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ expected 1 lifetime argument
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `fixed_len_str` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add missing lifetime argument
[INFO] [stdout]   |
[INFO] [stdout] 9 | fixed_len_str!(12)<'_>;
[INFO] [stdout]   |                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 lifetime arguments but 1 lifetime argument was supplied
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | fixed_len_str_nz!(12);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ expected 0 lifetime arguments
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `fixed_len_str_nz` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: missing generics for associated type `core::str::pattern::Pattern::Searcher`
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | fixed_len_str_nz!(12);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ expected 1 lifetime argument
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `fixed_len_str_nz` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add missing lifetime argument
[INFO] [stdout]    |
[INFO] [stdout] 10 | fixed_len_str_nz!(12)<'_>;
[INFO] [stdout]    |                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0195]: lifetime parameters or bounds on associated type `Searcher` do not match the trait declaration
[INFO] [stdout]  --> src/lib.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | fixed_len_str!(12);
[INFO] [stdout]   |                   ^ lifetimes do not match associated type in trait
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `fixed_len_str` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | fixed_len_str!(12);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ unconstrained lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `fixed_len_str` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0195]: lifetime parameters or bounds on associated type `Searcher` do not match the trait declaration
[INFO] [stdout]   --> src/lib.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 | fixed_len_str_nz!(12);
[INFO] [stdout]    |                      ^ lifetimes do not match associated type in trait
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `fixed_len_str_nz` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | fixed_len_str_nz!(12);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ unconstrained lifetime parameter
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `fixed_len_str_nz` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0107, E0195, E0207, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0107`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fixed_len_str_example` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "beb8c20982058c00d7bf95618b303b5b65aae807b9bb5802e0126be167c1ec23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beb8c20982058c00d7bf95618b303b5b65aae807b9bb5802e0126be167c1ec23", kill_on_drop: false }`
[INFO] [stdout] beb8c20982058c00d7bf95618b303b5b65aae807b9bb5802e0126be167c1ec23