[INFO] crate multi-producer-sink 0.5.2 is already in cache
[INFO] extracting crate multi-producer-sink 0.5.2 into work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/multi-producer-sink/0.5.2
[INFO] extracting crate multi-producer-sink 0.5.2 into work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/multi-producer-sink/0.5.2
[INFO] validating manifest of multi-producer-sink-0.5.2 on toolchain master#efe2f32a6b8217425f361ec7c206910c611c03ee
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of multi-producer-sink-0.5.2 on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing multi-producer-sink-0.5.2
[INFO] finished frobbing multi-producer-sink-0.5.2
[INFO] frobbed toml for multi-producer-sink-0.5.2 written to work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/multi-producer-sink/0.5.2/Cargo.toml
[INFO] started frobbing multi-producer-sink-0.5.2
[INFO] finished frobbing multi-producer-sink-0.5.2
[INFO] frobbed toml for multi-producer-sink-0.5.2 written to work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/multi-producer-sink/0.5.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `futures = "^0.2.0-alpha"`
[INFO] [stderr]   candidate versions found which didn't match: 0.1.26, 0.1.25, 0.1.24, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `multi-producer-sink v0.5.2 (/mnt/big/crater/work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/multi-producer-sink/0.5.2)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate multi-producer-sink-0.5.2 depends on yanked crates
[ERROR]