[INFO] updating cached repository geomatsi/rust-blue-pill-tests
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/geomatsi/rust-blue-pill-tests
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/geomatsi/rust-blue-pill-tests" "work/ex/beta-1.38-1/sources/1.37.0/gh/geomatsi/rust-blue-pill-tests"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/geomatsi/rust-blue-pill-tests'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/geomatsi/rust-blue-pill-tests" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geomatsi/rust-blue-pill-tests"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geomatsi/rust-blue-pill-tests'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f93bd573703ea89919806d6b074663a9c275eb93
[INFO] sha for GitHub repo geomatsi/rust-blue-pill-tests: f93bd573703ea89919806d6b074663a9c275eb93
[INFO] validating manifest of geomatsi/rust-blue-pill-tests on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of geomatsi/rust-blue-pill-tests on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing geomatsi/rust-blue-pill-tests
[INFO] finished frobbing geomatsi/rust-blue-pill-tests
[INFO] frobbed toml for geomatsi/rust-blue-pill-tests written to work/ex/beta-1.38-1/sources/1.37.0/gh/geomatsi/rust-blue-pill-tests/Cargo.toml
[INFO] started frobbing geomatsi/rust-blue-pill-tests
[INFO] finished frobbing geomatsi/rust-blue-pill-tests
[INFO] frobbed toml for geomatsi/rust-blue-pill-tests written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geomatsi/rust-blue-pill-tests/Cargo.toml
[INFO] crate geomatsi/rust-blue-pill-tests already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/stm32-rs/stm32f1xx-hal.git`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `cortex-m-rt`.
[INFO] [stderr]     ... required by package `stm32f1 v0.8.0`
[INFO] [stderr]     ... which is depended on by `stm32f1xx-hal v0.4.0 (https://github.com/stm32-rs/stm32f1xx-hal.git#9c9c6e10)`
[INFO] [stderr]     ... which is depended on by `blue-pill-tests v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/geomatsi/rust-blue-pill-tests)`
[INFO] [stderr] versions that meet the requirements `^0.6.10` are: 0.6.10
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `cortex-m-rt v0.6.8`
[INFO] [stderr]     ... which is depended on by `blue-pill-tests v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/geomatsi/rust-blue-pill-tests)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `cortex-m-rt` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed