[INFO] updating cached repository caspark/2015-05-rust-perf-talk-code
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/caspark/2015-05-rust-perf-talk-code
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/caspark/2015-05-rust-perf-talk-code" "work/ex/beta-1.38-1/sources/1.37.0/gh/caspark/2015-05-rust-perf-talk-code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/caspark/2015-05-rust-perf-talk-code'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/caspark/2015-05-rust-perf-talk-code" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caspark/2015-05-rust-perf-talk-code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caspark/2015-05-rust-perf-talk-code'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b9c71a28814437784de9e99512cbc4321d7372bf
[INFO] sha for GitHub repo caspark/2015-05-rust-perf-talk-code: b9c71a28814437784de9e99512cbc4321d7372bf
[INFO] validating manifest of caspark/2015-05-rust-perf-talk-code 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 caspark/2015-05-rust-perf-talk-code 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 caspark/2015-05-rust-perf-talk-code
[INFO] finished frobbing caspark/2015-05-rust-perf-talk-code
[INFO] frobbed toml for caspark/2015-05-rust-perf-talk-code written to work/ex/beta-1.38-1/sources/1.37.0/gh/caspark/2015-05-rust-perf-talk-code/Cargo.toml
[INFO] started frobbing caspark/2015-05-rust-perf-talk-code
[INFO] finished frobbing caspark/2015-05-rust-perf-talk-code
[INFO] frobbed toml for caspark/2015-05-rust-perf-talk-code written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caspark/2015-05-rust-perf-talk-code/Cargo.toml
[INFO] crate caspark/2015-05-rust-perf-talk-code 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] error: failed to load source for a dependency on `lodepng`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/pornel/lodepng-rust.git#c34071db
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to update submodule `doc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   invalid url `git@github.com:pornel/lodepng-rust.git`: relative URL without a base
[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