[INFO] cloning repository jamesmunns/deser_n
[INFO] running `"git" "clone" "--bare" "git://github.com/jamesmunns/deser_n.git" "work/cache/sources/gh/jamesmunns/deser_n"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/jamesmunns/deser_n'...
[INFO] running `"git" "clone" "work/cache/sources/gh/jamesmunns/deser_n" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/jamesmunns/deser_n"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/jamesmunns/deser_n'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jamesmunns/deser_n" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/jamesmunns/deser_n"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/jamesmunns/deser_n'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3a79f2b4a0c6a26dd44a802f2c5f69b78dc04c62
[INFO] sha for GitHub repo jamesmunns/deser_n: 3a79f2b4a0c6a26dd44a802f2c5f69b78dc04c62
[INFO] validating manifest of jamesmunns/deser_n on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jamesmunns/deser_n on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jamesmunns/deser_n
[INFO] finished frobbing jamesmunns/deser_n
[INFO] frobbed toml for jamesmunns/deser_n written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/jamesmunns/deser_n/Cargo.toml
[INFO] started frobbing jamesmunns/deser_n
[INFO] finished frobbing jamesmunns/deser_n
[INFO] frobbed toml for jamesmunns/deser_n written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/jamesmunns/deser_n/Cargo.toml
[INFO] crate jamesmunns/deser_n already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking jamesmunns/deser_n against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-6/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/jamesmunns/deser_n:/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=forbid" "-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" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d40295bf940fe299b0a9b2200fba4cb3e6d8d2ca4e752d89f0954b1752f6e1cd
[INFO] running `"docker" "start" "-a" "d40295bf940fe299b0a9b2200fba4cb3e6d8d2ca4e752d89f0954b1752f6e1cd"`
[INFO] [stderr]     Checking deser_n v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no method named `len` found for type `T` in the current scope
[INFO] [stderr]   --> src/main.rs:62:43
[INFO] [stderr]    |
[INFO] [stderr] 62 |             if b as usize <= self.rawdata.len() {
[INFO] [stderr]    |                                           ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `len`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `std::iter::ExactSizeIterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0608]: cannot index into a value of type `T`
[INFO] [stderr]   --> src/main.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         self.rawdata[self.cursize as usize] = b;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0599, E0608.
[INFO] [stderr] For more information about an error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `deser_n`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `len` found for type `T` in the current scope
[INFO] [stderr]   --> src/main.rs:62:43
[INFO] [stderr]    |
[INFO] [stderr] 62 |             if b as usize <= self.rawdata.len() {
[INFO] [stderr]    |                                           ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `len`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `std::iter::ExactSizeIterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0608]: cannot index into a value of type `T`
[INFO] [stderr]   --> src/main.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         self.rawdata[self.cursize as usize] = b;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0599, E0608.
[INFO] [stderr] For more information about an error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `deser_n`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d40295bf940fe299b0a9b2200fba4cb3e6d8d2ca4e752d89f0954b1752f6e1cd"`
[INFO] running `"docker" "rm" "-f" "d40295bf940fe299b0a9b2200fba4cb3e6d8d2ca4e752d89f0954b1752f6e1cd"`
[INFO] [stdout] d40295bf940fe299b0a9b2200fba4cb3e6d8d2ca4e752d89f0954b1752f6e1cd