[INFO] fetching crate microgemm 0.3.1...
[INFO] fixing microgemm-0.3.1 against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] extracting crate microgemm 0.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate microgemm 0.3.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate microgemm 0.3.1
[INFO] tweaked toml for crates.io crate microgemm 0.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate microgemm 0.3.1 on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate microgemm 0.3.1 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded serde_json v1.0.125
[INFO] [stderr]   Downloaded syn v2.0.75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9
[INFO] running `Command { std: "docker" "start" "37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
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[INFO] [stderr]    Compiling serde_derive v1.0.208
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[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/utils/proptest_kernel.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 | /         proptest!(|(pack_sizes in arb_pack_sizes.clone())| {
[INFO] [stdout] 110 | |             let mut actual = c.clone();
[INFO] [stdout] 111 | |             kernel.gemm_in(
[INFO] [stdout] 112 | |                 crate::GlobalAllocator,
[INFO] [stdout] ...   |
[INFO] [stdout] 120 | |             cmp(expect.as_slice(), actual.as_slice())?;
[INFO] [stdout] 121 | |         });
[INFO] [stdout]     | |__________^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/utils/proptest_kernel.rs:6:21
[INFO] [stdout]     |
[INFO] [stdout]   6 | use crate::{as_mut, std_prelude::*};
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/core/src/prelude/mod.rs:41:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout]     = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `$crate::proptest_helper` which comes from the expansion of the macro `proptest` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `panic` is ambiguous
[INFO] [stdout]    --> src/utils/proptest_kernel.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     proptest!(|(
[INFO] [stdout] 101 | |         [a, b, c] in triples,
[INFO] [stdout] 102 | |         alpha in alphas,
[INFO] [stdout] 103 | |         beta in betas,
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |         });
[INFO] [stdout] 122 | |     });
[INFO] [stdout]     | |______^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `panic` could refer to the macro imported here
[INFO] [stdout]    --> src/utils/proptest_kernel.rs:6:21
[INFO] [stdout]     |
[INFO] [stdout]   6 | use crate::{as_mut, std_prelude::*};
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `panic` to disambiguate
[INFO] [stdout]     = help: or use `self::panic` to refer to this macro unambiguously
[INFO] [stdout] note: `panic` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/core/src/prelude/mod.rs:41:12
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
[INFO] [stdout]     = note: this warning originates in the macro `$crate::proptest_helper` which comes from the expansion of the macro `proptest` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils/arbitrary.rs:18:19
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn to_ref(&self) -> MatRef<T> {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn to_ref(&self) -> MatRef<'_, T> {
[INFO] [stdout]    |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 28.20s
[INFO] [stderr] crater-edition-check: all finished
[INFO] running `Command { std: "docker" "inspect" "37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9", kill_on_drop: false }`
[INFO] [stdout] 37f274893716256d51c23294a5a61a40e033bb039b8911450049f027e93a43d9
