[INFO] updating cached repository DCubix/ToyLang
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DCubix/ToyLang
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DCubix/ToyLang" "work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DCubix/ToyLang" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DCubix/ToyLang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DCubix/ToyLang'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ca21919f17f4f26b897118cf59ea7ece3479061
[INFO] sha for GitHub repo DCubix/ToyLang: 9ca21919f17f4f26b897118cf59ea7ece3479061
[INFO] validating manifest of DCubix/ToyLang on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of DCubix/ToyLang on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing DCubix/ToyLang
[INFO] finished frobbing DCubix/ToyLang
[INFO] frobbed toml for DCubix/ToyLang written to work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang/Cargo.toml
[INFO] started frobbing DCubix/ToyLang
[INFO] finished frobbing DCubix/ToyLang
[INFO] frobbed toml for DCubix/ToyLang written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DCubix/ToyLang/Cargo.toml
[INFO] crate DCubix/ToyLang already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing DCubix/ToyLang against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] dd35fb7887f8ba54e5fb8bdbdc61cf1acefb004f92233764f4b65917ceeb126c
[INFO] running `"docker" "start" "-a" "dd35fb7887f8ba54e5fb8bdbdc61cf1acefb004f92233764f4b65917ceeb126c"`
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `crate::scanner::Scanner`
[INFO] [stderr]  --> src/interp.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::scanner::Scanner;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `prev` is assigned to, but never used
[INFO] [stderr]   --> src/lexer.rs:66:11
[INFO] [stderr]    |
[INFO] [stderr] 66 |         let mut prev = '\0';
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_prev` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `prev` is never read
[INFO] [stderr]    --> src/lexer.rs:157:4
[INFO] [stderr]     |
[INFO] [stderr] 157 |             prev = c;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/scanner.rs:22:2
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn next(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prev`
[INFO] [stderr]   --> src/scanner.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn prev(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `eat_until_any`
[INFO] [stderr]   --> src/scanner.rs:74:2
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn eat_until_any(&mut self, value: Vec<char>) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Boolean`
[INFO] [stderr]   --> src/interp.rs:17:2
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Boolean(bool),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step_back`
[INFO] [stderr]   --> src/interp.rs:61:2
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn step_back(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `arg_list`
[INFO] [stderr]    --> src/interp.rs:385:2
[INFO] [stderr]     |
[INFO] [stderr] 385 |     fn arg_list(&mut self) -> Result<Vec<Box<Node>>, String> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `KEYWORDS` should have a snake case name
[INFO] [stderr]   --> src/lexer.rs:48:7
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let KEYWORDS: HashMap<&str, BuiltinKeyword> = hashmap!{
[INFO] [stderr]    |             ^^^^^^^^ help: convert the identifier to snake case: `keywords`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.90s
[INFO] running `"docker" "inspect" "dd35fb7887f8ba54e5fb8bdbdc61cf1acefb004f92233764f4b65917ceeb126c"`
[INFO] running `"docker" "rm" "-f" "dd35fb7887f8ba54e5fb8bdbdc61cf1acefb004f92233764f4b65917ceeb126c"`
[INFO] [stdout] dd35fb7887f8ba54e5fb8bdbdc61cf1acefb004f92233764f4b65917ceeb126c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 76449d2d55c7567e893225be4861c2d9b731e5f17db4a1aa360b6821ea40f1ef
[INFO] running `"docker" "start" "-a" "76449d2d55c7567e893225be4861c2d9b731e5f17db4a1aa360b6821ea40f1ef"`
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `crate::scanner::Scanner`
[INFO] [stderr]  --> src/interp.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::scanner::Scanner;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `prev` is assigned to, but never used
[INFO] [stderr]   --> src/lexer.rs:66:11
[INFO] [stderr]    |
[INFO] [stderr] 66 |         let mut prev = '\0';
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_prev` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `prev` is never read
[INFO] [stderr]    --> src/lexer.rs:157:4
[INFO] [stderr]     |
[INFO] [stderr] 157 |             prev = c;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/scanner.rs:22:2
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn next(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prev`
[INFO] [stderr]   --> src/scanner.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn prev(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `eat_until_any`
[INFO] [stderr]   --> src/scanner.rs:74:2
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn eat_until_any(&mut self, value: Vec<char>) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Boolean`
[INFO] [stderr]   --> src/interp.rs:17:2
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Boolean(bool),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step_back`
[INFO] [stderr]   --> src/interp.rs:61:2
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn step_back(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `arg_list`
[INFO] [stderr]    --> src/interp.rs:385:2
[INFO] [stderr]     |
[INFO] [stderr] 385 |     fn arg_list(&mut self) -> Result<Vec<Box<Node>>, String> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `KEYWORDS` should have a snake case name
[INFO] [stderr]   --> src/lexer.rs:48:7
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let KEYWORDS: HashMap<&str, BuiltinKeyword> = hashmap!{
[INFO] [stderr]    |             ^^^^^^^^ help: convert the identifier to snake case: `keywords`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "76449d2d55c7567e893225be4861c2d9b731e5f17db4a1aa360b6821ea40f1ef"`
[INFO] running `"docker" "rm" "-f" "76449d2d55c7567e893225be4861c2d9b731e5f17db4a1aa360b6821ea40f1ef"`
[INFO] [stdout] 76449d2d55c7567e893225be4861c2d9b731e5f17db4a1aa360b6821ea40f1ef
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/DCubix/ToyLang:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 538d6d94a5f2bc6ba35a4e5d9e37de5ec65c580a415c997f870c8b572fc62a3a
[INFO] running `"docker" "start" "-a" "538d6d94a5f2bc6ba35a4e5d9e37de5ec65c580a415c997f870c8b572fc62a3a"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lang-5ff6145f5f8430b0
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "538d6d94a5f2bc6ba35a4e5d9e37de5ec65c580a415c997f870c8b572fc62a3a"`
[INFO] running `"docker" "rm" "-f" "538d6d94a5f2bc6ba35a4e5d9e37de5ec65c580a415c997f870c8b572fc62a3a"`
[INFO] [stdout] 538d6d94a5f2bc6ba35a4e5d9e37de5ec65c580a415c997f870c8b572fc62a3a