[INFO] fetching crate syn_str 0.1.58...
[INFO] checking syn_str-0.1.58 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate syn_str 0.1.58 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate syn_str 0.1.58
[INFO] finished tweaking crates.io crate syn_str 0.1.58
[INFO] tweaked toml for crates.io crate syn_str 0.1.58 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate syn_str 0.1.58 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding fixed_len_str v0.2.9 (available: v0.3.3)
[INFO] [stderr]       Adding pretty_assertions v0.6.1 (available: v1.4.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b857bcffd4d7aa4c9fbfce7dcc5d06acf742ad3ae551a3aa8812453cd26dc064
[INFO] running `Command { std: "docker" "start" "-a" "b857bcffd4d7aa4c9fbfce7dcc5d06acf742ad3ae551a3aa8812453cd26dc064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b857bcffd4d7aa4c9fbfce7dcc5d06acf742ad3ae551a3aa8812453cd26dc064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b857bcffd4d7aa4c9fbfce7dcc5d06acf742ad3ae551a3aa8812453cd26dc064", kill_on_drop: false }`
[INFO] [stdout] b857bcffd4d7aa4c9fbfce7dcc5d06acf742ad3ae551a3aa8812453cd26dc064
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9424746988ea5134fceeaa65ef0e4bcf7a474676d22c98cb66d129e9618ad1d
[INFO] running `Command { std: "docker" "start" "-a" "d9424746988ea5134fceeaa65ef0e4bcf7a474676d22c98cb66d129e9618ad1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_len_str v0.2.9
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking syn_str v0.1.58 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<FixedStr4, Infallible>
[INFO] [stdout]   --> src/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | fixed_len_str!(4);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[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: this type will no longer be must used: Result<FixedStr40, Infallible>
[INFO] [stdout]   --> src/lib.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | fixed_len_str!(40);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[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] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/custom_types.rs:55:35
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub(crate) fn get_generics(mut e: &str) -> Result<Vec<Generic>, &'static str> {
[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] 55 | pub(crate) fn get_generics(mut e: &str) -> Result<Vec<Generic<'_>>, &'static str> {
[INFO] [stdout]    |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/custom_types.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |         for s in e.clone().split(|c: char| {
[INFO] [stdout]     |                   ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/custom_types.rs:319:17
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn generics(&self) -> &Vec<Generic>;
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]     |                 |         |    |
[INFO] [stdout]     |                 |         |    the same lifetime is hidden here
[INFO] [stdout]     |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn generics(&self) -> &Vec<Generic<'_>>;
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/custom_types.rs:702:17
[INFO] [stdout]     |
[INFO] [stdout] 702 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]     |                 |         |    |
[INFO] [stdout]     |                 |         |    the same lifetime is hidden here
[INFO] [stdout]     |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 702 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1375:17
[INFO] [stdout]      |
[INFO] [stdout] 1375 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]      |                 |         |    |
[INFO] [stdout]      |                 |         |    the same lifetime is hidden here
[INFO] [stdout]      |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1375 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]      |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1650:17
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]      |                 |         |    |
[INFO] [stdout]      |                 |         |    the same lifetime is hidden here
[INFO] [stdout]      |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]      |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1719:20
[INFO] [stdout]      |
[INFO] [stdout] 1719 |     pub fn resolve(&self, concrete: &'a str) -> Cow<str> {
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1719 |     pub fn resolve(&self, concrete: &'a str) -> Cow<'_, str> {
[INFO] [stdout]      |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<FixedStr4, Infallible>
[INFO] [stdout]   --> src/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | fixed_len_str!(4);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[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] [stderr] error: could not compile `syn_str` (lib test) due to 2 previous errors; 7 warnings emitted
[INFO] [stdout] error: this type will no longer be must used: Result<FixedStr40, Infallible>
[INFO] [stdout]   --> src/lib.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | fixed_len_str!(40);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/custom_types.rs:55:35
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub(crate) fn get_generics(mut e: &str) -> Result<Vec<Generic>, &'static str> {
[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] 55 | pub(crate) fn get_generics(mut e: &str) -> Result<Vec<Generic<'_>>, &'static str> {
[INFO] [stdout]    |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/custom_types.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |         for s in e.clone().split(|c: char| {
[INFO] [stdout]     |                   ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/custom_types.rs:319:17
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn generics(&self) -> &Vec<Generic>;
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]     |                 |         |    |
[INFO] [stdout]     |                 |         |    the same lifetime is hidden here
[INFO] [stdout]     |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn generics(&self) -> &Vec<Generic<'_>>;
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/custom_types.rs:702:17
[INFO] [stdout]     |
[INFO] [stdout] 702 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]     |                 |         |    |
[INFO] [stdout]     |                 |         |    the same lifetime is hidden here
[INFO] [stdout]     |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 702 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1375:17
[INFO] [stdout]      |
[INFO] [stdout] 1375 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]      |                 |         |    |
[INFO] [stdout]      |                 |         |    the same lifetime is hidden here
[INFO] [stdout]      |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1375 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]      |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1650:17
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     fn generics(&self) -> &Vec<Generic> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^
[INFO] [stdout]      |                 |         |    |
[INFO] [stdout]      |                 |         |    the same lifetime is hidden here
[INFO] [stdout]      |                 |         the same lifetime is elided here
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1650 |     fn generics(&self) -> &Vec<Generic<'_>> {
[INFO] [stdout]      |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/custom_types.rs:1719:20
[INFO] [stdout]      |
[INFO] [stdout] 1719 |     pub fn resolve(&self, concrete: &'a str) -> Cow<str> {
[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] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1719 |     pub fn resolve(&self, concrete: &'a str) -> Cow<'_, str> {
[INFO] [stdout]      |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn_str` (lib) due to 2 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d9424746988ea5134fceeaa65ef0e4bcf7a474676d22c98cb66d129e9618ad1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9424746988ea5134fceeaa65ef0e4bcf7a474676d22c98cb66d129e9618ad1d", kill_on_drop: false }`
[INFO] [stdout] d9424746988ea5134fceeaa65ef0e4bcf7a474676d22c98cb66d129e9618ad1d
