[INFO] cloning repository https://github.com/Cerulity64X/two_mutable_refs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Cerulity64X/two_mutable_refs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCerulity64X%2Ftwo_mutable_refs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCerulity64X%2Ftwo_mutable_refs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d69ccd41fef2dd1ef0de18d32fed77d0a56d5a4a
[INFO] building Cerulity64X/two_mutable_refs against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCerulity64X%2Ftwo_mutable_refs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cerulity64X/two_mutable_refs on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Cerulity64X/two_mutable_refs
[INFO] finished tweaking git repo https://github.com/Cerulity64X/two_mutable_refs
[INFO] tweaked toml for git repo https://github.com/Cerulity64X/two_mutable_refs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Cerulity64X/two_mutable_refs 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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81b39ab7e9b26f00325dd412bb103ed062553127f48059d9e0896ff56c92e30b
[INFO] running `Command { std: "docker" "start" "-a" "81b39ab7e9b26f00325dd412bb103ed062553127f48059d9e0896ff56c92e30b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81b39ab7e9b26f00325dd412bb103ed062553127f48059d9e0896ff56c92e30b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81b39ab7e9b26f00325dd412bb103ed062553127f48059d9e0896ff56c92e30b", kill_on_drop: false }`
[INFO] [stdout] 81b39ab7e9b26f00325dd412bb103ed062553127f48059d9e0896ff56c92e30b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16e73610b54b54c75f23eca3b1db4a5cea5d5cf1df7f65f94fe2025c4061390d
[INFO] running `Command { std: "docker" "start" "-a" "16e73610b54b54c75f23eca3b1db4a5cea5d5cf1df7f65f94fe2025c4061390d", kill_on_drop: false }`
[INFO] [stderr]    Compiling two_mutable_refs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/no_print.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..ref_count {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_double_mut` is never used
[INFO] [stdout]  --> src/printed.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub unsafe fn pointer_casting_double_mut() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_cloning_double_mut` is never used
[INFO] [stdout]   --> src/printed.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub unsafe fn rc_cloning_double_mut() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_double_mut_np` is never used
[INFO] [stdout]  --> src/no_print.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub unsafe fn pointer_casting_double_mut_np() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_cloning_double_mut_np` is never used
[INFO] [stdout]   --> src/no_print.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub unsafe fn rc_cloning_double_mut_np() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_multi_mut_np` is never used
[INFO] [stdout]   --> src/no_print.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub unsafe fn pointer_casting_multi_mut_np(ref_count: usize) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "16e73610b54b54c75f23eca3b1db4a5cea5d5cf1df7f65f94fe2025c4061390d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16e73610b54b54c75f23eca3b1db4a5cea5d5cf1df7f65f94fe2025c4061390d", kill_on_drop: false }`
[INFO] [stdout] 16e73610b54b54c75f23eca3b1db4a5cea5d5cf1df7f65f94fe2025c4061390d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ce5f04bfb480e1568bea6bff94456e6692f43d7b5a7d3000086bba3bbc1087c
[INFO] running `Command { std: "docker" "start" "-a" "8ce5f04bfb480e1568bea6bff94456e6692f43d7b5a7d3000086bba3bbc1087c", kill_on_drop: false }`
[INFO] [stderr]    Compiling two_mutable_refs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/no_print.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..ref_count {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_double_mut` is never used
[INFO] [stdout]  --> src/printed.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub unsafe fn pointer_casting_double_mut() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_cloning_double_mut` is never used
[INFO] [stdout]   --> src/printed.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub unsafe fn rc_cloning_double_mut() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_double_mut_np` is never used
[INFO] [stdout]  --> src/no_print.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub unsafe fn pointer_casting_double_mut_np() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_cloning_double_mut_np` is never used
[INFO] [stdout]   --> src/no_print.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub unsafe fn rc_cloning_double_mut_np() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pointer_casting_multi_mut_np` is never used
[INFO] [stdout]   --> src/no_print.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub unsafe fn pointer_casting_multi_mut_np(ref_count: usize) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "8ce5f04bfb480e1568bea6bff94456e6692f43d7b5a7d3000086bba3bbc1087c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ce5f04bfb480e1568bea6bff94456e6692f43d7b5a7d3000086bba3bbc1087c", kill_on_drop: false }`
[INFO] [stdout] 8ce5f04bfb480e1568bea6bff94456e6692f43d7b5a7d3000086bba3bbc1087c
