[INFO] updating cached repository https://github.com/douchuan/jvm
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/douchuan/jvm
[INFO] [stderr]    07dc3b5..17e5666  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 17e56662a9703ff38fc31ddc277e3385da7443c2
[INFO] checking douchuan/jvm against try#89c05fd3cc6404a13e1bd71450c6132a2755fa4b for pr-69741
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdouchuan%2Fjvm" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/douchuan/jvm on toolchain 89c05fd3cc6404a13e1bd71450c6132a2755fa4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/douchuan/jvm
[INFO] finished tweaking git repo https://github.com/douchuan/jvm
[INFO] tweaked toml for git repo https://github.com/douchuan/jvm written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/douchuan/jvm already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3be7d38e08ab1ad0b13629c572245445634a1e488c8f7012ccb3733e9cb065c1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "3be7d38e08ab1ad0b13629c572245445634a1e488c8f7012ccb3733e9cb065c1"`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking bzip2-sys v0.1.7
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking zip v0.5.4
[INFO] [stderr]     Checking jvm v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/native/java_lang_Class.rs:841:5
[INFO] [stderr]     |
[INFO] [stderr] 840 |     unimplemented!();
[INFO] [stderr]     |     ----------------- any code following this expression is unreachable
[INFO] [stderr] 841 |     let r = oop::consts::get_null();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/native/java_lang_Class.rs:841:5
[INFO] [stderr]     |
[INFO] [stderr] 840 |     unimplemented!();
[INFO] [stderr]     |     ----------------- any code following this expression is unreachable
[INFO] [stderr] 841 |     let r = oop::consts::get_null();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `ref_bytes` is never read
[INFO] [stderr]    --> src/main.rs:148:17
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let mut ref_bytes = None;
[INFO] [stderr]     |                 ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f2`
[INFO] [stderr]    --> src/main.rs:292:13
[INFO] [stderr]     |
[INFO] [stderr] 292 |         let f2 = frame.read().unwrap();
[INFO] [stderr]     |             ^^ help: consider prefixing with an underscore: `_f2`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_stack_trace`
[INFO] [stderr]  --> src/util/debug.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn print_stack_trace(jt: &JavaThread) {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_stack_trace`
[INFO] [stderr]  --> src/util/debug.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn print_stack_trace(jt: &JavaThread) {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.47s
[INFO] running `"docker" "inspect" "3be7d38e08ab1ad0b13629c572245445634a1e488c8f7012ccb3733e9cb065c1"`
[INFO] running `"docker" "rm" "-f" "3be7d38e08ab1ad0b13629c572245445634a1e488c8f7012ccb3733e9cb065c1"`
[INFO] [stdout] 3be7d38e08ab1ad0b13629c572245445634a1e488c8f7012ccb3733e9cb065c1