[INFO] updating cached repository rickyhan/cargo-web-bug
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rickyhan/cargo-web-bug
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rickyhan/cargo-web-bug" "work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rickyhan/cargo-web-bug"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rickyhan/cargo-web-bug'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rickyhan/cargo-web-bug" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rickyhan/cargo-web-bug"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rickyhan/cargo-web-bug'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5af09369cb0017c46f2fc1a966b7c98a7267317a
[INFO] sha for GitHub repo rickyhan/cargo-web-bug: 5af09369cb0017c46f2fc1a966b7c98a7267317a
[INFO] validating manifest of rickyhan/cargo-web-bug on toolchain master#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rickyhan/cargo-web-bug on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rickyhan/cargo-web-bug
[INFO] finished frobbing rickyhan/cargo-web-bug
[INFO] frobbed toml for rickyhan/cargo-web-bug written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rickyhan/cargo-web-bug/Cargo.toml
[INFO] started frobbing rickyhan/cargo-web-bug
[INFO] finished frobbing rickyhan/cargo-web-bug
[INFO] frobbed toml for rickyhan/cargo-web-bug written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rickyhan/cargo-web-bug/Cargo.toml
[INFO] crate rickyhan/cargo-web-bug already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/RustPython/RustPython.git`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/OddCoincidence/unicode-casing`
[INFO] [stderr] error: failed to select a version for `bitflags`.
[INFO] [stderr]     ... required by package `cloudabi v0.0.3`
[INFO] [stderr]     ... which is depended on by `rand v0.5.6`
[INFO] [stderr]     ... which is depended on by `rustpython_vm v0.1.0 (https://github.com/RustPython/RustPython.git#4a108c1e)`
[INFO] [stderr]     ... which is depended on by `cargowebbug v0.1.0 (/mnt/big/crater/work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rickyhan/cargo-web-bug)`
[INFO] [stderr] versions that meet the requirements `= 1.0.4` are: 1.0.4
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `bitflags v1.1.0`
[INFO] [stderr]     ... which is depended on by `rustpython_bytecode v0.1.0 (https://github.com/RustPython/RustPython.git#4a108c1e)`
[INFO] [stderr]     ... which is depended on by `rustpython_compiler v0.1.0 (https://github.com/RustPython/RustPython.git#4a108c1e)`
[INFO] [stderr]     ... which is depended on by `rustpython_derive v0.1.0 (https://github.com/RustPython/RustPython.git#4a108c1e)`
[INFO] [stderr]     ... which is depended on by `rustpython_vm v0.1.0 (https://github.com/RustPython/RustPython.git#4a108c1e)`
[INFO] [stderr]     ... which is depended on by `cargowebbug v0.1.0 (/mnt/big/crater/work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rickyhan/cargo-web-bug)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `bitflags` 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" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed