[INFO] cloning repository mimblewimble/grin-wallet
[INFO] running `"git" "clone" "--bare" "git://github.com/mimblewimble/grin-wallet.git" "work/cache/sources/gh/mimblewimble/grin-wallet"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/mimblewimble/grin-wallet'...
[INFO] running `"git" "clone" "work/cache/sources/gh/mimblewimble/grin-wallet" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/mimblewimble/grin-wallet"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/mimblewimble/grin-wallet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mimblewimble/grin-wallet" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/mimblewimble/grin-wallet"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/mimblewimble/grin-wallet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b6d597d39a9fbc635fe6768c72370f80a2a05f8
[INFO] sha for GitHub repo mimblewimble/grin-wallet: 7b6d597d39a9fbc635fe6768c72370f80a2a05f8
[INFO] validating manifest of mimblewimble/grin-wallet on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mimblewimble/grin-wallet on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mimblewimble/grin-wallet
[INFO] removed workspace from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_api from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_config from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_controller from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_impls from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_libwallet from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_util from mimblewimble/grin-wallet
[INFO] finished frobbing mimblewimble/grin-wallet
[INFO] frobbed toml for mimblewimble/grin-wallet written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/mimblewimble/grin-wallet/Cargo.toml
[INFO] started frobbing mimblewimble/grin-wallet
[INFO] removed workspace from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_api from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_config from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_controller from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_impls from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_libwallet from mimblewimble/grin-wallet
[INFO] removed path dependency grin_wallet_util from mimblewimble/grin-wallet
[INFO] finished frobbing mimblewimble/grin-wallet
[INFO] frobbed toml for mimblewimble/grin-wallet written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/mimblewimble/grin-wallet/Cargo.toml
[INFO] crate mimblewimble/grin-wallet already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `grin_wallet_api = "^2.0.1-beta.1"`
[INFO] [stderr]   candidate versions found which didn't match: 2.0.0, 1.1.0
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `grin_wallet v2.0.1-beta.1 (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/mimblewimble/grin-wallet)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed