[INFO] crate ufmt_float 0.1.0 is already in cache
[INFO] testing ufmt_float-0.1.0 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate ufmt_float 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ufmt_float 0.1.0 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ufmt_float 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ufmt_float 0.1.0
[INFO] tweaked toml for crates.io crate ufmt_float 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 40ce73acc95e257b1f2b10dd234b4c58d4e6a6327c4403d02546e0483ae49032
[INFO] running `"docker" "start" "-a" "40ce73acc95e257b1f2b10dd234b4c58d4e6a6327c4403d02546e0483ae49032"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling micromath v1.0.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling ufmt-macros v0.1.1
[INFO] [stderr]    Compiling ufmt v0.1.0
[INFO] [stderr]    Compiling ufmt_float v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.71s
[INFO] running `"docker" "inspect" "40ce73acc95e257b1f2b10dd234b4c58d4e6a6327c4403d02546e0483ae49032"`
[INFO] running `"docker" "rm" "-f" "40ce73acc95e257b1f2b10dd234b4c58d4e6a6327c4403d02546e0483ae49032"`
[INFO] [stdout] 40ce73acc95e257b1f2b10dd234b4c58d4e6a6327c4403d02546e0483ae49032
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] accd1977612d872297eac9ff572be664117297a2073077c3649eb019ce76a97a
[INFO] running `"docker" "start" "-a" "accd1977612d872297eac9ff572be664117297a2073077c3649eb019ce76a97a"`
[INFO] [stderr]    Compiling ufmt_float v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "accd1977612d872297eac9ff572be664117297a2073077c3649eb019ce76a97a"`
[INFO] running `"docker" "rm" "-f" "accd1977612d872297eac9ff572be664117297a2073077c3649eb019ce76a97a"`
[INFO] [stdout] accd1977612d872297eac9ff572be664117297a2073077c3649eb019ce76a97a
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d380f9b41f5ab4b3273a5e0bdf4582647ab3aa6c446b7c43bb3fbbdc92f0d58c
[INFO] running `"docker" "start" "-a" "d380f9b41f5ab4b3273a5e0bdf4582647ab3aa6c446b7c43bb3fbbdc92f0d58c"`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ufmt_float-4119082559ce21c4
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ufmt_float
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 9) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs -  (line 9) stdout ----
[INFO] [stdout] error[E0599]: no method named `do_as_formatter` found for mutable reference `&mut std::string::String` in the current scope
[INFO] [stdout]    --> src/lib.rs:15:1
[INFO] [stdout]     |
[INFO] [stdout] 9   |   uwriteln!(&mut s, "{}",pi_write).unwrap();
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `&mut std::string::String`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the method `do_as_formatter` exists but the following trait bounds were not satisfied:
[INFO] [stdout]             `std::string::String: ufmt_write::uWrite`
[INFO] [stdout]             which is required by `std::string::String: ufmt::UnstableDoAsFormatter`
[INFO] [stdout]             `&mut std::string::String: ufmt_write::uWrite`
[INFO] [stdout]             which is required by `&mut std::string::String: ufmt::UnstableDoAsFormatter`
[INFO] [stdout]             `str: ufmt_write::uWrite`
[INFO] [stdout]             which is required by `str: ufmt::UnstableDoAsFormatter`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs -  (line 9)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "d380f9b41f5ab4b3273a5e0bdf4582647ab3aa6c446b7c43bb3fbbdc92f0d58c"`
[INFO] running `"docker" "rm" "-f" "d380f9b41f5ab4b3273a5e0bdf4582647ab3aa6c446b7c43bb3fbbdc92f0d58c"`
[INFO] [stdout] d380f9b41f5ab4b3273a5e0bdf4582647ab3aa6c446b7c43bb3fbbdc92f0d58c