[INFO] fetching crate jni-mangle 0.1.2...
[INFO] checking jni-mangle-0.1.2 against master#cccf075eba88363269e8589ebb8d40874cc542d8 for pr-142681
[INFO] extracting crate jni-mangle 0.1.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate jni-mangle 0.1.2
[INFO] finished tweaking crates.io crate jni-mangle 0.1.2
[INFO] tweaked toml for crates.io crate jni-mangle 0.1.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate jni-mangle 0.1.2 on toolchain cccf075eba88363269e8589ebb8d40874cc542d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cccf075eba88363269e8589ebb8d40874cc542d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate jni-mangle 0.1.2 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" "+cccf075eba88363269e8589ebb8d40874cc542d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+cccf075eba88363269e8589ebb8d40874cc542d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48131fe757996b58d6bab763cda3819a90b18a2be76481201a9e6de07517e281
[INFO] running `Command { std: "docker" "start" "-a" "48131fe757996b58d6bab763cda3819a90b18a2be76481201a9e6de07517e281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48131fe757996b58d6bab763cda3819a90b18a2be76481201a9e6de07517e281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48131fe757996b58d6bab763cda3819a90b18a2be76481201a9e6de07517e281", kill_on_drop: false }`
[INFO] [stdout] 48131fe757996b58d6bab763cda3819a90b18a2be76481201a9e6de07517e281
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+cccf075eba88363269e8589ebb8d40874cc542d8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afdc3ad4faec2ef2c1e0af211643b38d5071cdf4fb9c69a932aa7d3b7dba0341
[INFO] running `Command { std: "docker" "start" "-a" "afdc3ad4faec2ef2c1e0af211643b38d5071cdf4fb9c69a932aa7d3b7dba0341", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking aho-corasick v1.0.5
[INFO] [stderr]     Checking quote v1.0.33
[INFO] [stderr]     Checking syn v2.0.31
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking darling_core v0.20.3
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]    Compiling darling_macro v0.20.3
[INFO] [stderr]     Checking darling v0.20.3
[INFO] [stderr]     Checking jni-mangle v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `syn::Block`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use syn::Block;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::Block`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use syn::Block;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::Block`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use syn::Block;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: functions generic over types or consts must be mangled
[INFO] [stdout]   --> examples/example.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 25 |   #[mangle(package = "com.example", class = "Example")]
[INFO] [stdout]    |   ----------------------------------------------------- help: remove this attribute
[INFO] [stdout] 26 | / pub fn test_fn<'a, T>(var: &'a T) -> String
[INFO] [stdout] 27 | | where
[INFO] [stdout] 28 | |     T: ToString,
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(no_mangle_generic_items)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `String`, which is not FFI-safe
[INFO] [stdout]   --> examples/example.rs:26:38
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn test_fn<'a, T>(var: &'a T) -> String
[INFO] [stdout]    |                                      ^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.04s
[INFO] running `Command { std: "docker" "inspect" "afdc3ad4faec2ef2c1e0af211643b38d5071cdf4fb9c69a932aa7d3b7dba0341", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afdc3ad4faec2ef2c1e0af211643b38d5071cdf4fb9c69a932aa7d3b7dba0341", kill_on_drop: false }`
[INFO] [stdout] afdc3ad4faec2ef2c1e0af211643b38d5071cdf4fb9c69a932aa7d3b7dba0341