[INFO] cloning repository wchargin/de2fa
[INFO] running `"git" "clone" "--bare" "git://github.com/wchargin/de2fa.git" "work/cache/sources/gh/wchargin/de2fa"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/wchargin/de2fa'...
[INFO] running `"git" "clone" "work/cache/sources/gh/wchargin/de2fa" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/wchargin/de2fa"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/wchargin/de2fa'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wchargin/de2fa" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/wchargin/de2fa"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/wchargin/de2fa'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8cc854c5dc85799f8eb08936d855d90d8279c332
[INFO] sha for GitHub repo wchargin/de2fa: 8cc854c5dc85799f8eb08936d855d90d8279c332
[INFO] validating manifest of wchargin/de2fa 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 wchargin/de2fa 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 wchargin/de2fa
[INFO] finished frobbing wchargin/de2fa
[INFO] frobbed toml for wchargin/de2fa written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/wchargin/de2fa/Cargo.toml
[INFO] started frobbing wchargin/de2fa
[INFO] finished frobbing wchargin/de2fa
[INFO] frobbed toml for wchargin/de2fa written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/wchargin/de2fa/Cargo.toml
[INFO] crate wchargin/de2fa 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]  Downloading crates ...
[INFO] [stderr]   Downloaded num-derive v0.2.0
[INFO] [stderr]   Downloaded quirc v0.0.1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking wchargin/de2fa against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-3/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/wchargin/de2fa:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c6f1a6bdfdf4ead9ef182a7607f48db2e7886e65044252cc9dd93f360b3f1ae8
[INFO] running `"docker" "start" "-a" "c6f1a6bdfdf4ead9ef182a7607f48db2e7886e65044252cc9dd93f360b3f1ae8"`
[INFO] [stderr]     Checking byte-tools v0.1.3
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]     Checking base32 v0.3.1
[INFO] [stderr]    Compiling quirc v0.0.1
[INFO] [stderr]     Checking generic-array v0.7.3
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking url v1.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.14
[INFO] [stderr]     Checking crypto-mac v0.3.0
[INFO] [stderr]     Checking digest v0.5.2
[INFO] [stderr]     Checking digest-buffer v0.3.1
[INFO] [stderr]     Checking hmac v0.1.1
[INFO] [stderr]     Checking sha-1 v0.3.4
[INFO] [stderr]     Checking sha2 v0.5.3
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking oath v0.10.2
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking de2fa v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.94s
[INFO] running `"docker" "inspect" "c6f1a6bdfdf4ead9ef182a7607f48db2e7886e65044252cc9dd93f360b3f1ae8"`
[INFO] running `"docker" "rm" "-f" "c6f1a6bdfdf4ead9ef182a7607f48db2e7886e65044252cc9dd93f360b3f1ae8"`
[INFO] [stdout] c6f1a6bdfdf4ead9ef182a7607f48db2e7886e65044252cc9dd93f360b3f1ae8