[INFO] fetching crate spanner 0.2.0...
[INFO] testing spanner-0.2.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate spanner 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate spanner 0.2.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate spanner 0.2.0
[INFO] tweaked toml for crates.io crate spanner 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate spanner 0.2.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate spanner 0.2.0 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ccaeec430843915b19c0a89b3697300e921f163a5cdfeb853a029918f290f5c
[INFO] running `Command { std: "docker" "start" "-a" "1ccaeec430843915b19c0a89b3697300e921f163a5cdfeb853a029918f290f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ccaeec430843915b19c0a89b3697300e921f163a5cdfeb853a029918f290f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ccaeec430843915b19c0a89b3697300e921f163a5cdfeb853a029918f290f5c", kill_on_drop: false }`
[INFO] [stdout] 1ccaeec430843915b19c0a89b3697300e921f163a5cdfeb853a029918f290f5c
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0365050f91e08f4b29fd78fbd61c87a60824a8130b9125f0459073b442e571d
[INFO] running `Command { std: "docker" "start" "-a" "a0365050f91e08f4b29fd78fbd61c87a60824a8130b9125f0459073b442e571d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling pin-project-lite v0.2.15
[INFO] [stderr]    Compiling bytemuck v1.21.0
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.91
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling tyfling v0.1.0
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling spanner v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `round_char_boundary` has been stable since 1.91.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(round_char_boundary)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.50s
[INFO] running `Command { std: "docker" "inspect" "a0365050f91e08f4b29fd78fbd61c87a60824a8130b9125f0459073b442e571d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0365050f91e08f4b29fd78fbd61c87a60824a8130b9125f0459073b442e571d", kill_on_drop: false }`
[INFO] [stdout] a0365050f91e08f4b29fd78fbd61c87a60824a8130b9125f0459073b442e571d
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d70e8981318971333461a319d1e53e1427a6e25c3066018a03bda72ed64c5ef4
[INFO] running `Command { std: "docker" "start" "-a" "d70e8981318971333461a319d1e53e1427a6e25c3066018a03bda72ed64c5ef4", kill_on_drop: false }`
[INFO] [stdout] warning: the feature `round_char_boundary` has been stable since 1.91.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(round_char_boundary)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling spanner v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `round_char_boundary` has been stable since 1.91.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(round_char_boundary)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "d70e8981318971333461a319d1e53e1427a6e25c3066018a03bda72ed64c5ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d70e8981318971333461a319d1e53e1427a6e25c3066018a03bda72ed64c5ef4", kill_on_drop: false }`
[INFO] [stdout] d70e8981318971333461a319d1e53e1427a6e25c3066018a03bda72ed64c5ef4
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 55973a5f5eccd392662cf4e09a1c7e98c4898a81a79da471eb53fcc1eca6dd1d
[INFO] running `Command { std: "docker" "start" "-a" "55973a5f5eccd392662cf4e09a1c7e98c4898a81a79da471eb53fcc1eca6dd1d", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `round_char_boundary` has been stable since 1.91.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(round_char_boundary)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `spanner` (lib) generated 1 warning
[INFO] [stderr] warning: `spanner` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/spanner-3b043560d0f20586)
[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]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-e69f6f45ef897af6)
[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 spanner
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - Spanner (line 21) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Spanner (line 21) stdout ----
[INFO] [stdout] error[E0053]: method `name` has an incompatible type for trait
[INFO] [stdout]   --> src/lib.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn name(&self) -> &str {
[INFO] [stdout]    |                       ^^^^ expected `Option<&str>`, found `&str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected signature `fn(&MySource) -> Option<&str>`
[INFO] [stdout]               found signature `fn(&MySource) -> &str`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]    |
[INFO] [stdout] 35 -     fn name(&self) -> &str {
[INFO] [stdout] 35 +     fn name(&self) -> Option<&str> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `MySource: Default` is not satisfied
[INFO] [stdout]   --> src/lib.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl BufferSource for MySource {
[INFO] [stdout]    |                       ^^^^^^^^ the trait `Default` is not implemented for `MySource`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `BufferSource`
[INFO] [stdout]   --> /opt/rustwide/workdir/src/buffer.rs:11:33
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait BufferSource: Debug + Default {
[INFO] [stdout]    |                                 ^^^^^^^ required by this bound in `BufferSource`
[INFO] [stdout] help: consider annotating `MySource` with `#[derive(Default)]`
[INFO] [stdout]    |
[INFO] [stdout] 25 + #[derive(Default)]
[INFO] [stdout] 26 | struct MySource {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `MySource` doesn't implement `Debug`
[INFO] [stdout]   --> src/lib.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl BufferSource for MySource {
[INFO] [stdout]    |                       ^^^^^^^^ the trait `Debug` is not implemented for `MySource`
[INFO] [stdout]    |
[INFO] [stdout]    = note: add `#[derive(Debug)]` to `MySource` or manually `impl Debug for MySource`
[INFO] [stdout] note: required by a bound in `BufferSource`
[INFO] [stdout]   --> /opt/rustwide/workdir/src/buffer.rs:11:25
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait BufferSource: Debug + Default {
[INFO] [stdout]    |                         ^^^^^ required by this bound in `BufferSource`
[INFO] [stdout] help: consider annotating `MySource` with `#[derive(Debug)]`
[INFO] [stdout]    |
[INFO] [stdout] 25 + #[derive(Debug)]
[INFO] [stdout] 26 | struct MySource {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `spanner` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/lib.rs:42:11
[INFO] [stdout]    |
[INFO] [stdout] 42 | let buf = spanner.add(|_| MySource {
[INFO] [stdout]    |           ^^^^^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 40 | let mut spanner = Spanner::new();
[INFO] [stdout]    |     +++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0277, E0596.
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Spanner (line 21)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "55973a5f5eccd392662cf4e09a1c7e98c4898a81a79da471eb53fcc1eca6dd1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55973a5f5eccd392662cf4e09a1c7e98c4898a81a79da471eb53fcc1eca6dd1d", kill_on_drop: false }`
[INFO] [stdout] 55973a5f5eccd392662cf4e09a1c7e98c4898a81a79da471eb53fcc1eca6dd1d