2026-08-25 19:05.23: New job: Build Dockerfile using linux-x86_64 in
                                [https://github.com/ocurrent/ocaml-ci.git#refs/heads/live-engine (b2c56b444d53c729f75f483ed4ba880e4b848817)]
2026-08-25 19:05.23: Using cache hint "https://github.com/ocurrent/ocaml-ci.git-Dockerfile"
2026-08-25 19:05.23: Connecting to build cluster…
2026-08-25 19:05.23: Waiting for resource in pool OCluster
2026-08-25 19:05.23: Waiting for worker…
2026-08-25 19:05.23: Got resource from pool OCluster
Building on doris.caelum.ci.dev
HEAD is now at 9ec128e web: don't let the error template clobber the PoW interstitial
HEAD is now at b2c56b4 Pass the compatible package subset to day10 (--only-packages)
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 3.41kB done
#1 DONE 0.1s

#2 resolve image config for docker-image://docker.io/docker/dockerfile:1
#2 DONE 0.7s

#3 docker-image://docker.io/docker/dockerfile:1@sha256:ecfaec9ed6d810b56388c508f4121597bfbba70d41a6dfeee4d8cad5f295fc32
#3 resolve docker.io/docker/dockerfile:1@sha256:ecfaec9ed6d810b56388c508f4121597bfbba70d41a6dfeee4d8cad5f295fc32 0.0s done
#3 CACHED

#4 [internal] load metadata for docker.io/library/debian:13
#4 ...

#5 [internal] load metadata for docker.io/ocaml/opam:debian-13-ocaml-4.14
#5 DONE 0.6s

#4 [internal] load metadata for docker.io/library/debian:13
#4 DONE 0.8s

#6 [internal] load .dockerignore
#6 transferring context:
#6 transferring context: 114B done
#6 DONE 0.3s

#7 [stage-1 1/6] FROM docker.io/library/debian:13@sha256:f324c7ff54321e8d9c588493a20244965938ce0aa50bbd1022d38010e9ffc4b1
#7 resolve docker.io/library/debian:13@sha256:f324c7ff54321e8d9c588493a20244965938ce0aa50bbd1022d38010e9ffc4b1 0.0s done
#7 DONE 0.0s

#8 [build  1/13] FROM docker.io/ocaml/opam:debian-13-ocaml-4.14@sha256:ed2b393a41ea2deae242c8fa3fcca94b44351a24e1d62540c878e0f014b27442
#8 resolve docker.io/ocaml/opam:debian-13-ocaml-4.14@sha256:ed2b393a41ea2deae242c8fa3fcca94b44351a24e1d62540c878e0f014b27442 0.0s done
#8 ...

#9 [internal] setting cache mount permissions
#9 DONE 0.0s

#10 [internal] load build context
#10 transferring context: 9.06MB 0.1s done
#10 DONE 0.1s

#8 [build  1/13] FROM docker.io/ocaml/opam:debian-13-ocaml-4.14@sha256:ed2b393a41ea2deae242c8fa3fcca94b44351a24e1d62540c878e0f014b27442
#8 CANCELED

#7 [stage-1 1/6] FROM docker.io/library/debian:13@sha256:f324c7ff54321e8d9c588493a20244965938ce0aa50bbd1022d38010e9ffc4b1
#7 sha256:27ee9a8250487842a26b1ffa1215982ba9ae27010bce1997d52f9f8628578d17 0B / 49.34MB 0.1s
#7 ...

#11 [stage-1 2/6] RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
#11 CANCELED
Dockerfile:19
--------------------
  17 |     RUN cd ~/opam-repository && git fetch -q origin master && git reset --hard ceed23f9d33677f323a62325ad42599d14f46b98 && opam update
  18 |     RUN opam option --global solver=builtin-0install
  19 | >>> COPY --chown=opam --link ocaml-ci.opam ocaml-ci-service.opam ocaml-ci-api.opam /src/
  20 |     WORKDIR /src
  21 |     # Pin current_* to the ocurrent branch carrying the proof-of-work challenge
--------------------
ERROR: failed to build: failed to solve: invalid user index: -1
docker-build failed with exit-code 1
2026-08-25 19:06.20: Job failed: Failed: Build failed