[INFO] cloning repository https://github.com/wangtao2014/rust-advanced
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wangtao2014/rust-advanced" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangtao2014%2Frust-advanced", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangtao2014%2Frust-advanced'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c8e8b8f688653f2ac4d7d823140f1c053a64cec
[INFO] checking wangtao2014/rust-advanced against try#6db1a6a7ebb2ad243051f3ff949f987dd70cde2b+rustflags=-Dreturn-local-variable-ptr for pr-134218
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangtao2014%2Frust-advanced" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangtao2014/rust-advanced on toolchain 6db1a6a7ebb2ad243051f3ff949f987dd70cde2b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangtao2014/rust-advanced
[INFO] finished tweaking git repo https://github.com/wangtao2014/rust-advanced
[INFO] tweaked toml for git repo https://github.com/wangtao2014/rust-advanced written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wangtao2014/rust-advanced 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" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking wangtao2014/rust-advanced against try#6db1a6a7ebb2ad243051f3ff949f987dd70cde2b+rustflags=-Dreturn-local-variable-ptr for pr-134218
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangtao2014%2Frust-advanced" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangtao2014/rust-advanced on toolchain 6db1a6a7ebb2ad243051f3ff949f987dd70cde2b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangtao2014/rust-advanced
[INFO] finished tweaking git repo https://github.com/wangtao2014/rust-advanced
[INFO] tweaked toml for git repo https://github.com/wangtao2014/rust-advanced written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wangtao2014/rust-advanced 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" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a903cb45b02c7d41d0783b45d2d13e84392c0beb6ce696a60643c8fc39a8c7ff
[INFO] running `Command { std: "docker" "start" "-a" "a903cb45b02c7d41d0783b45d2d13e84392c0beb6ce696a60643c8fc39a8c7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a903cb45b02c7d41d0783b45d2d13e84392c0beb6ce696a60643c8fc39a8c7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a903cb45b02c7d41d0783b45d2d13e84392c0beb6ce696a60643c8fc39a8c7ff", kill_on_drop: false }`
[INFO] [stdout] a903cb45b02c7d41d0783b45d2d13e84392c0beb6ce696a60643c8fc39a8c7ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dreturn-local-variable-ptr" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2673f219885054c846487a4d4503807974de7db0aedbc1303d91fa68d26882f4
[INFO] running `Command { std: "docker" "start" "-a" "2673f219885054c846487a4d4503807974de7db0aedbc1303d91fa68d26882f4", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/hello_macro)
[INFO] [stderr]     Checking super_trait v0.1.0 (/opt/rustwide/workdir/super_trait)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> super_trait/src/main.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 148 | /     loop {
[INFO] [stdout] 149 | |         println!("hello world!");
[INFO] [stdout] 150 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 151 |
[INFO] [stdout] 152 |       panic!("hello world!"); // panic 不会返回值
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> super_trait/src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Counter;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:103:7
[INFO] [stdout]     |
[INFO] [stdout] 103 | trait Animal {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]    --> super_trait/src/main.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Dog;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `body_name` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl Dog {
[INFO] [stdout]     | -------- associated function in this implementation
[INFO] [stdout] 116 |     fn body_name() -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_closure` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> super_trait/src/main.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 148 | /     loop {
[INFO] [stdout] 149 | |         println!("hello world!");
[INFO] [stdout] 150 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 151 |
[INFO] [stdout] 152 |       panic!("hello world!"); // panic 不会返回值
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> super_trait/src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Counter;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:103:7
[INFO] [stdout]     |
[INFO] [stdout] 103 | trait Animal {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]    --> super_trait/src/main.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Dog;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `body_name` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl Dog {
[INFO] [stdout]     | -------- associated function in this implementation
[INFO] [stdout] 116 |     fn body_name() -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_closure` is never used
[INFO] [stdout]    --> super_trait/src/main.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.49/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.49/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2673f219885054c846487a4d4503807974de7db0aedbc1303d91fa68d26882f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2673f219885054c846487a4d4503807974de7db0aedbc1303d91fa68d26882f4", kill_on_drop: false }`
[INFO] [stdout] 2673f219885054c846487a4d4503807974de7db0aedbc1303d91fa68d26882f4