[INFO] fetching crate printf-compat 0.4.0...
[INFO] checking printf-compat-0.4.0 against 40527f3e444fde1deb361751bdef9b9e11d1b971+rustflags=--cfg crater_hack --force-warn invalid-c-variadic-arguments for pr-162478
[INFO] extracting crate printf-compat 0.4.0 into /workspace/builds/worker-3-tc2/source
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate printf-compat 0.4.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate printf-compat 0.4.0
[INFO] tweaked toml for crates.io crate printf-compat 0.4.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate printf-compat 0.4.0 on toolchain 40527f3e444fde1deb361751bdef9b9e11d1b971
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate printf-compat 0.4.0 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" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `printf-compat` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6
[INFO] running `Command { std: "docker" "start" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6", 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" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6", 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" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid --cfg crater_hack --force-warn invalid-c-variadic-arguments" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `printf-compat` (manifest) generated 1 warning
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]     Checking bitflags v2.11.1
[INFO] [stderr]     Checking printf-compat v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `c_variadic` has been stable since 1.99.0 and no longer requires an attribute to enable
[INFO] [stdout]    --> src/lib.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 114 | #![feature(c_variadic)]
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `c_variadic` has been stable since 1.99.0 and no longer requires an attribute to enable
[INFO] [stdout]    --> src/lib.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 114 | #![feature(c_variadic)]
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `c_variadic` has been stable since 1.99.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tests/tests.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(c_variadic)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:93:37
[INFO] [stdout]    |
[INFO] [stdout] 93 |         assert_eq_fmt!(c"hello %s", c"world" => "hello world");
[INFO] [stdout]    |                                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:93:37
[INFO] [stdout]    |
[INFO] [stdout] 93 |         assert_eq_fmt!(c"hello %s", c"world" => "hello world");
[INFO] [stdout]    |                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout]    = note: requested on the command line with `--force-warn invalid-c-variadic-arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:94:39
[INFO] [stdout]    |
[INFO] [stdout] 94 |         assert_eq_fmt!(c"hello %%%s", c"world" => "hello %world");
[INFO] [stdout]    |                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:94:39
[INFO] [stdout]    |
[INFO] [stdout] 94 |         assert_eq_fmt!(c"hello %%%s", c"world" => "hello %world");
[INFO] [stdout]    |                                       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:95:33
[INFO] [stdout]    |
[INFO] [stdout] 95 |         assert_eq_fmt!(c"%10s", c"world" => "     world");
[INFO] [stdout]    |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:95:33
[INFO] [stdout]    |
[INFO] [stdout] 95 |         assert_eq_fmt!(c"%10s", c"world" => "     world");
[INFO] [stdout]    |                                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |         assert_eq_fmt!(c"%.4s", c"world" => "worl");
[INFO] [stdout]    |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |         assert_eq_fmt!(c"%.4s", c"world" => "worl");
[INFO] [stdout]    |                                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:97:35
[INFO] [stdout]    |
[INFO] [stdout] 97 |         assert_eq_fmt!(c"%10.4s", c"world" => "      worl");
[INFO] [stdout]    |                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:97:35
[INFO] [stdout]    |
[INFO] [stdout] 97 |         assert_eq_fmt!(c"%10.4s", c"world" => "      worl");
[INFO] [stdout]    |                                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 98 |         assert_eq_fmt!(c"%-10.4s", c"world" => "worl      ");
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 98 |         assert_eq_fmt!(c"%-10.4s", c"world" => "worl      ");
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `&std::ffi::CStr`.
[INFO] [stdout]   --> tests/tests.rs:99:34
[INFO] [stdout]    |
[INFO] [stdout] 99 |         assert_eq_fmt!(c"%-10s", c"world" => "world     ");
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `&std::ffi::CStr` does not implement `VaArgSafe`
[INFO] [stdout]   --> tests/tests.rs:99:34
[INFO] [stdout]    |
[INFO] [stdout] 99 |         assert_eq_fmt!(c"%-10s", c"world" => "world     ");
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[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 #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `printf-compat` (test "tests") due to 7 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6", kill_on_drop: false }`
[INFO] [stdout] 142b4930dda88284f992cc0d59a1f8fd2239c684d72e9c0c5f945b5aae9dbea6
