[INFO] cloning repository https://github.com/winksaville/expr-cannot-borrow-mutable-e0502
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/winksaville/expr-cannot-borrow-mutable-e0502" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinksaville%2Fexpr-cannot-borrow-mutable-e0502", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinksaville%2Fexpr-cannot-borrow-mutable-e0502'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10e39a0c4b6a293ee0021af0f42ee834b7203141
[INFO] testing winksaville/expr-cannot-borrow-mutable-e0502 against try#7af779037716ae4125ceabb429791b4cf5dd0a43 for pr-136932
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinksaville%2Fexpr-cannot-borrow-mutable-e0502" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/winksaville/expr-cannot-borrow-mutable-e0502 on toolchain 7af779037716ae4125ceabb429791b4cf5dd0a43
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/winksaville/expr-cannot-borrow-mutable-e0502
[INFO] finished tweaking git repo https://github.com/winksaville/expr-cannot-borrow-mutable-e0502
[INFO] tweaked toml for git repo https://github.com/winksaville/expr-cannot-borrow-mutable-e0502 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/winksaville/expr-cannot-borrow-mutable-e0502 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" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 923e632cc1ceaa98f1d811c2c1d62e893f568b0add6f33dad2fe87c693822271
[INFO] running `Command { std: "docker" "start" "-a" "923e632cc1ceaa98f1d811c2c1d62e893f568b0add6f33dad2fe87c693822271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "923e632cc1ceaa98f1d811c2c1d62e893f568b0add6f33dad2fe87c693822271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923e632cc1ceaa98f1d811c2c1d62e893f568b0add6f33dad2fe87c693822271", kill_on_drop: false }`
[INFO] [stdout] 923e632cc1ceaa98f1d811c2c1d62e893f568b0add6f33dad2fe87c693822271
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a02dc314d6210bbde54a32a352117f2becbae5d13f6e73d35d42fb76841ad506
[INFO] running `Command { std: "docker" "start" "-a" "a02dc314d6210bbde54a32a352117f2becbae5d13f6e73d35d42fb76841ad506", kill_on_drop: false }`
[INFO] [stderr]    Compiling expr-cannot-borrow-mutable-e0502 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         for i in self.nums.iter() {
[INFO] [stdout]    |                  ----------------
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  immutable borrow occurs here
[INFO] [stdout]    |                  immutable borrow later used here
[INFO] [stdout] 25 |             sum += i;
[INFO] [stdout] 26 |             self.push_sum(sum); // Uncommenting this causes compile error E0502
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `expr-cannot-borrow-mutable-e0502` (bin "expr-cannot-borrow-mutable-e0502") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a02dc314d6210bbde54a32a352117f2becbae5d13f6e73d35d42fb76841ad506", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a02dc314d6210bbde54a32a352117f2becbae5d13f6e73d35d42fb76841ad506", kill_on_drop: false }`
[INFO] [stdout] a02dc314d6210bbde54a32a352117f2becbae5d13f6e73d35d42fb76841ad506