[INFO] updating cached repository ForestCSharp/cimgui-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ForestCSharp/cimgui-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ForestCSharp/cimgui-rs" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/ForestCSharp/cimgui-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/ForestCSharp/cimgui-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ForestCSharp/cimgui-rs" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/ForestCSharp/cimgui-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/ForestCSharp/cimgui-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 00b907176ff50db0cc780254821451f01759549e
[INFO] sha for GitHub repo ForestCSharp/cimgui-rs: 00b907176ff50db0cc780254821451f01759549e
[INFO] validating manifest of ForestCSharp/cimgui-rs on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ForestCSharp/cimgui-rs on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ForestCSharp/cimgui-rs
[INFO] finished frobbing ForestCSharp/cimgui-rs
[INFO] frobbed toml for ForestCSharp/cimgui-rs written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/ForestCSharp/cimgui-rs/Cargo.toml
[INFO] started frobbing ForestCSharp/cimgui-rs
[INFO] finished frobbing ForestCSharp/cimgui-rs
[INFO] frobbed toml for ForestCSharp/cimgui-rs written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/ForestCSharp/cimgui-rs/Cargo.toml
[INFO] crate ForestCSharp/cimgui-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/ForestCSharp/cimgui-rs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/gfx-rs/gfx.git`
[INFO] [stderr] error: failed to select a version for `gfx-backend-vulkan`.
[INFO] [stderr]     ... required by package `cimgui v0.1.0 (/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/ForestCSharp/cimgui-rs)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.2.0
[INFO] [stderr] 
[INFO] [stderr] the package `cimgui` depends on `gfx-backend-vulkan`, with features: `glsl-to-spirv` but `gfx-backend-vulkan` does not have these features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `gfx-backend-vulkan` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed