block scipy-1.6.1

In many cases bug [1] causes `scipy.sparse.coo_matrix` to cast complex matrix to float.

[1] https://github.com/scipy/scipy/issues/13585
27 jobs for master in 3 minutes and 19 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build Env
manual #171869
allowed to fail manual
build-env:conda
manual #171867
allowed to fail manual
build-env:debian
manual #171871
allowed to fail manual
build-env:default
manual #171865
allowed to fail manual
build-env:ubuntu
 
  Build
failed #171881
allowed to fail
build:bleeding-edge

00:00:22

failed #171874
build:debian

00:00:22

failed #171880
build:latest

00:00:22

passed #171877
build:no-extras

00:02:37

passed #171875
build:stable

00:02:38

passed #171872
build:ubuntu

00:03:19

 
  Test
skipped #171903
build PDF documentation
skipped #171901
build documentation
skipped #171905
allowed to fail
check for broken links in doc
skipped #171886
allowed to fail
check for dependencies installed
skipped #171884
allowed to fail
check whitespace style
skipped #171899
coverage:latest
skipped #171897
allowed to fail
test:bleeding-edge
skipped #171893
test:debian
skipped #171896
test:latest
skipped #171889
test:no-extras
skipped #171887
test:stable
skipped #171891
test:ubuntu
 
  Deploy
skipped #171909
allowed to fail manual
remove_coverage
skipped #171912
allowed to fail manual
remove_docs
skipped #171907
upload coverage
skipped #171913
upload dev version docs
skipped #171911
upload documentation to the test server
 
Name Stage Failure
failed
build:bleeding-edge Build There has been a runner system failure, please try again
Using Docker executor with image gitlab.kwant-project.org:5005/kwant/kwant ...
Authenticating with credentials from job payload (GitLab Registry)
Pulling docker image gitlab.kwant-project.org:5005/kwant/kwant ...
Using docker image sha256:3b0a14e5028f34c59abed300d492408bf827d6fe5523e89ea589cab97af9f9c8 for gitlab.kwant-project.org:5005/kwant/kwant ...
Preparing environment
Authenticating with credentials from /root/.docker/config.json
Uploading artifacts for failed job
Authenticating with credentials from /root/.docker/config.json
ERROR: Job failed (system failure): Error response from daemon: OCI runtime create failed: container_linux.go:346: starting container process caused "process_linux.go:319: getting the final child's pid from pipe caused \"EOF\"": unknown (docker.go:881:5s)
failed
build:latest Build There has been a runner system failure, please try again
Using Docker executor with image gitlab.kwant-project.org:5005/kwant/kwant ...
Authenticating with credentials from job payload (GitLab Registry)
Pulling docker image gitlab.kwant-project.org:5005/kwant/kwant ...
Using docker image sha256:3b0a14e5028f34c59abed300d492408bf827d6fe5523e89ea589cab97af9f9c8 for gitlab.kwant-project.org:5005/kwant/kwant ...
Preparing environment
Authenticating with credentials from /root/.docker/config.json
Uploading artifacts for failed job
Authenticating with credentials from /root/.docker/config.json
ERROR: Job failed (system failure): Error response from daemon: OCI runtime create failed: container_linux.go:346: starting container process caused "process_linux.go:319: getting the final child's pid from pipe caused \"EOF\"": unknown (docker.go:881:5s)
failed
build:debian Build There has been a runner system failure, please try again
Using Docker executor with image gitlab.kwant-project.org:5005/kwant/kwant/debian ...
Authenticating with credentials from job payload (GitLab Registry)
Pulling docker image gitlab.kwant-project.org:5005/kwant/kwant/debian ...
Using docker image sha256:408a148e5441cdde982b3c674384e469c523eb8ae408a52b448c72028c3c3ec2 for gitlab.kwant-project.org:5005/kwant/kwant/debian ...
Preparing environment
Authenticating with credentials from /root/.docker/config.json
Uploading artifacts for failed job
Authenticating with credentials from /root/.docker/config.json
ERROR: Job failed (system failure): Error response from daemon: OCI runtime create failed: container_linux.go:346: starting container process caused "process_linux.go:319: getting the final child's pid from pipe caused \"EOF\"": unknown (docker.go:881:4s)