[INFO] cloning repository https://github.com/nepali-prabhat/compiler_practise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nepali-prabhat/compiler_practise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnepali-prabhat%2Fcompiler_practise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnepali-prabhat%2Fcompiler_practise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f94dd7ae23b0302715b7d26943e39723735f96e2
[INFO] testing nepali-prabhat/compiler_practise against beta-2025-10-28 for beta-1.92-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnepali-prabhat%2Fcompiler_practise" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nepali-prabhat/compiler_practise
[INFO] finished tweaking git repo https://github.com/nepali-prabhat/compiler_practise
[INFO] tweaked toml for git repo https://github.com/nepali-prabhat/compiler_practise written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nepali-prabhat/compiler_practise on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nepali-prabhat/compiler_practise 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e898d6f9f409d9f644d865dbff598c5e5546b1a8bbdf4d70c6f73a303f21cd3
[INFO] running `Command { std: "docker" "start" "-a" "7e898d6f9f409d9f644d865dbff598c5e5546b1a8bbdf4d70c6f73a303f21cd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e898d6f9f409d9f644d865dbff598c5e5546b1a8bbdf4d70c6f73a303f21cd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e898d6f9f409d9f644d865dbff598c5e5546b1a8bbdf4d70c6f73a303f21cd3", kill_on_drop: false }`
[INFO] [stdout] 7e898d6f9f409d9f644d865dbff598c5e5546b1a8bbdf4d70c6f73a303f21cd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3150e86c834d284d66098441de1c26ca9e3406699c0775958e7a06359b6b046c
[INFO] running `Command { std: "docker" "start" "-a" "3150e86c834d284d66098441de1c26ca9e3406699c0775958e7a06359b6b046c", kill_on_drop: false }`
[INFO] [stderr]    Compiling modern-compiler-implementation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:40:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 40 |     ) -> Option<Box<Context>>
[INFO] [stdout]    |                     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 40 |     ) -> Option<Box<Context<'a>>>
[INFO] [stdout]    |                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:90:35
[INFO] [stdout]    |
[INFO] [stdout] 88 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] 89 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 90 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 90 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:99:35
[INFO] [stdout]    |
[INFO] [stdout] 97 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] 98 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 99 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 99 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/straight_line_prog/mod.rs:128:35
[INFO] [stdout]     |
[INFO] [stdout] 126 |         &'a self,
[INFO] [stdout]     |          -- the lifetime is named here
[INFO] [stdout] 127 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 128 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]     |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 128 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "3150e86c834d284d66098441de1c26ca9e3406699c0775958e7a06359b6b046c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3150e86c834d284d66098441de1c26ca9e3406699c0775958e7a06359b6b046c", kill_on_drop: false }`
[INFO] [stdout] 3150e86c834d284d66098441de1c26ca9e3406699c0775958e7a06359b6b046c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f218dc7e26960b2cf6fa29fd15078aed3aced343fa7a78db2b5d8ed01c014ad
[INFO] running `Command { std: "docker" "start" "-a" "2f218dc7e26960b2cf6fa29fd15078aed3aced343fa7a78db2b5d8ed01c014ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling modern-compiler-implementation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:40:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 40 |     ) -> Option<Box<Context>>
[INFO] [stdout]    |                     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 40 |     ) -> Option<Box<Context<'a>>>
[INFO] [stdout]    |                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:90:35
[INFO] [stdout]    |
[INFO] [stdout] 88 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] 89 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 90 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 90 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/straight_line_prog/mod.rs:99:35
[INFO] [stdout]    |
[INFO] [stdout] 97 |         &'a self,
[INFO] [stdout]    |          -- the lifetime is named here
[INFO] [stdout] 98 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 99 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 99 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/straight_line_prog/mod.rs:128:35
[INFO] [stdout]     |
[INFO] [stdout] 126 |         &'a self,
[INFO] [stdout]     |          -- the lifetime is named here
[INFO] [stdout] 127 |         context: Option<Box<Context<'b>>>,
[INFO] [stdout] 128 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stdout]     |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 128 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "2f218dc7e26960b2cf6fa29fd15078aed3aced343fa7a78db2b5d8ed01c014ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f218dc7e26960b2cf6fa29fd15078aed3aced343fa7a78db2b5d8ed01c014ad", kill_on_drop: false }`
[INFO] [stdout] 2f218dc7e26960b2cf6fa29fd15078aed3aced343fa7a78db2b5d8ed01c014ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9c56948a00a150f3a5ea639b5181df71706dbefdbe5e17c9d9c62e28636544f5
[INFO] running `Command { std: "docker" "start" "-a" "9c56948a00a150f3a5ea639b5181df71706dbefdbe5e17c9d9c62e28636544f5", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stderr]   --> src/straight_line_prog/mod.rs:40:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |         &'a self,
[INFO] [stderr]    |          -- the lifetime is named here
[INFO] [stderr] ...
[INFO] [stderr] 40 |     ) -> Option<Box<Context>>
[INFO] [stderr]    |                     ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]    |
[INFO] [stderr] 40 |     ) -> Option<Box<Context<'a>>>
[INFO] [stderr]    |                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stderr]   --> src/straight_line_prog/mod.rs:90:35
[INFO] [stderr]    |
[INFO] [stderr] 88 |         &'a self,
[INFO] [stderr]    |          -- the lifetime is named here
[INFO] [stderr] 89 |         context: Option<Box<Context<'b>>>,
[INFO] [stderr] 90 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stderr]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]    |
[INFO] [stderr] 90 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stderr]   --> src/straight_line_prog/mod.rs:99:35
[INFO] [stderr]    |
[INFO] [stderr] 97 |         &'a self,
[INFO] [stderr]    |          -- the lifetime is named here
[INFO] [stderr] 98 |         context: Option<Box<Context<'b>>>,
[INFO] [stderr] 99 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stderr]    |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]    |
[INFO] [stderr] 99 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stderr]    --> src/straight_line_prog/mod.rs:128:35
[INFO] [stderr]     |
[INFO] [stderr] 126 |         &'a self,
[INFO] [stderr]     |          -- the lifetime is named here
[INFO] [stderr] 127 |         context: Option<Box<Context<'b>>>,
[INFO] [stderr] 128 |     ) -> (Option<u32>, Option<Box<Context>>)
[INFO] [stderr]     |                                   ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]     |
[INFO] [stderr] 128 |     ) -> (Option<u32>, Option<Box<Context<'a>>>)
[INFO] [stderr]     |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `modern-compiler-implementation` (bin "modern-compiler-implementation" test) generated 4 warnings (run `cargo fix --bin "modern-compiler-implementation" -p modern-compiler-implementation --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/modern_compiler_implementation-5972cc6d82b1eb43)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test lexer::tests::tests::single_length_tokens ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9c56948a00a150f3a5ea639b5181df71706dbefdbe5e17c9d9c62e28636544f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c56948a00a150f3a5ea639b5181df71706dbefdbe5e17c9d9c62e28636544f5", kill_on_drop: false }`
[INFO] [stdout] 9c56948a00a150f3a5ea639b5181df71706dbefdbe5e17c9d9c62e28636544f5
