Dec 17 18:09:59.339 INFO checking panicbit/toy_rpn_calc against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 18:09:59.339 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/panicbit/toy_rpn_calc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 18:09:59.797 INFO [stdout] b342f599300dbab2f9642e09ae1c25c0e3ef9aa5d3e9f97a4bfcc7b88f61a70a
Dec 17 18:09:59.799 INFO running `"docker" "start" "-a" "b342f599300dbab2f9642e09ae1c25c0e3ef9aa5d3e9f97a4bfcc7b88f61a70a"`
Dec 17 18:10:01.271 INFO [stderr]     Checking backtrace v0.3.9
Dec 17 18:10:01.731 INFO [stderr]     Checking failure v0.1.1
Dec 17 18:10:02.202 INFO [stderr]     Checking stackulon v0.1.0 (/opt/crater/workdir)
Dec 17 18:10:03.073 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
Dec 17 18:10:03.618 INFO running `"docker" "inspect" "b342f599300dbab2f9642e09ae1c25c0e3ef9aa5d3e9f97a4bfcc7b88f61a70a"`
Dec 17 18:10:03.861 INFO running `"docker" "rm" "-f" "b342f599300dbab2f9642e09ae1c25c0e3ef9aa5d3e9f97a4bfcc7b88f61a70a"`
Dec 17 18:10:04.180 INFO [stdout] b342f599300dbab2f9642e09ae1c25c0e3ef9aa5d3e9f97a4bfcc7b88f61a70a