[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 1.91.0 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-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nepali-prabhat/compiler_practise on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd20197b2efb06762de64986b6a0310a909eadcb8ad9b3bab6ebe519dce10858
[INFO] running `Command { std: "docker" "start" "-a" "bd20197b2efb06762de64986b6a0310a909eadcb8ad9b3bab6ebe519dce10858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd20197b2efb06762de64986b6a0310a909eadcb8ad9b3bab6ebe519dce10858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd20197b2efb06762de64986b6a0310a909eadcb8ad9b3bab6ebe519dce10858", kill_on_drop: false }`
[INFO] [stdout] bd20197b2efb06762de64986b6a0310a909eadcb8ad9b3bab6ebe519dce10858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3cf95f4373fe261fd0b43f16c09ec44b10422cc38d3af74873b95d24481e665
[INFO] running `Command { std: "docker" "start" "-a" "b3cf95f4373fe261fd0b43f16c09ec44b10422cc38d3af74873b95d24481e665", 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 0.69s
[INFO] running `Command { std: "docker" "inspect" "b3cf95f4373fe261fd0b43f16c09ec44b10422cc38d3af74873b95d24481e665", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3cf95f4373fe261fd0b43f16c09ec44b10422cc38d3af74873b95d24481e665", kill_on_drop: false }`
[INFO] [stdout] b3cf95f4373fe261fd0b43f16c09ec44b10422cc38d3af74873b95d24481e665
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d18fd434ce41e53f9ccdaff2ec5004034be1b0f00d8b8465a7542c3bf7c2ded
[INFO] running `Command { std: "docker" "start" "-a" "1d18fd434ce41e53f9ccdaff2ec5004034be1b0f00d8b8465a7542c3bf7c2ded", 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 0.64s
[INFO] running `Command { std: "docker" "inspect" "1d18fd434ce41e53f9ccdaff2ec5004034be1b0f00d8b8465a7542c3bf7c2ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d18fd434ce41e53f9ccdaff2ec5004034be1b0f00d8b8465a7542c3bf7c2ded", kill_on_drop: false }`
[INFO] [stdout] 1d18fd434ce41e53f9ccdaff2ec5004034be1b0f00d8b8465a7542c3bf7c2ded
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d90f28efc9eda27eca729cbf8c8df40ea9449cb77518237cbc54fa918a2c6714
[INFO] running `Command { std: "docker" "start" "-a" "d90f28efc9eda27eca729cbf8c8df40ea9449cb77518237cbc54fa918a2c6714", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout] 
[INFO] [stderr]   --> src/straight_line_prog/mod.rs:40:21
[INFO] [stdout] running 1 test
[INFO] [stderr]    |
[INFO] [stdout] test lexer::tests::tests::single_length_tokens ... ok
[INFO] [stderr] 37 |         &'a self,
[INFO] [stdout] 
[INFO] [stderr]    |          -- the lifetime is named here
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] ...
[INFO] [stdout] 
[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" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/modern_compiler_implementation-fe2beffbe2c10852)
[INFO] running `Command { std: "docker" "inspect" "d90f28efc9eda27eca729cbf8c8df40ea9449cb77518237cbc54fa918a2c6714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d90f28efc9eda27eca729cbf8c8df40ea9449cb77518237cbc54fa918a2c6714", kill_on_drop: false }`
[INFO] [stdout] d90f28efc9eda27eca729cbf8c8df40ea9449cb77518237cbc54fa918a2c6714
