Cannot read packages in docker interpreter (Tar error?)

Recently, using a dockerized python environment with some installed packages has lead to problems. PyCharm does not recognize any installed packages any more. In the log, I found the following error. While I have rebuilt the container recently, nothing but some code changes have occurred. I'm using PyCharm 2018.1 on Arch Linux.

```

2018-05-03 10:26:59,889 [ 130796] INFO - .skeletons.PySkeletonGenerator - Retrieving binary module list took 1113 ms
2018-05-03 10:26:59,953 [ 130860] INFO - .CloudSilentLoggingHandlerImpl - Creating container...
2018-05-03 10:27:06,851 [ 137758] INFO - .skeletons.PySkeletonGenerator - Failed to download remote sources /usr/lib/python2.7 to local directory /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/
com.jetbrains.python.sdk.InvalidSdkException: Failed to download remote sources /usr/lib/python2.7 to local directory /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/
at com.jetbrains.python.docker.PyDockerSkeletonGeneratorBase.downloadSources(PyDockerSkeletonGeneratorBase.kt:148)
at com.jetbrains.python.docker.PyDockerSkeletonGeneratorBase.refreshGeneratedSkeletons(PyDockerSkeletonGeneratorBase.kt:95)
at com.jetbrains.python.sdk.skeletons.PySkeletonRefresher.regenerateSkeletons(PySkeletonRefresher.java:352)
at com.jetbrains.python.sdk.skeletons.PySkeletonRefresher.refreshSkeletonsOfSdk(PySkeletonRefresher.java:124)
at com.jetbrains.python.sdk.PythonSdkUpdater$2.run(PythonSdkUpdater.java:181)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:750)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:580)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:395)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:305)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Error detected parsing the header
at org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:280)
at com.intellij.docker.remote.run.runtime.RemoteDockerApplicationRuntime.extractTar(RemoteDockerApplicationRuntime.java:330)
at com.intellij.docker.remote.run.runtime.RemoteDockerApplicationRuntime.extractTar(RemoteDockerApplicationRuntime.java:320)
at com.intellij.docker.remote.run.runtime.RemoteDockerApplicationRuntime.downloadDirectory(RemoteDockerApplicationRuntime.java:306)
at com.intellij.docker.remote.run.runtime.RemoteDockerApplicationRuntime.downloadDirectoryAndRemove(RemoteDockerApplicationRuntime.java:227)
at com.jetbrains.python.docker.PyDockerSkeletonGenerator.doDownloadSources(PyDockerSkeletonGenerator.java:217)
at com.jetbrains.python.docker.PyDockerSkeletonGeneratorBase.downloadSources(PyDockerSkeletonGeneratorBase.kt:145)
... 17 more
Caused by: java.lang.IllegalArgumentException: Invalid byte 41 at offset 0 in ')�;q��I' len=8
at org.apache.commons.compress.archivers.tar.TarUtils.parseOctal(TarUtils.java:137)
at org.apache.commons.compress.archivers.tar.TarUtils.parseOctalOrBinary(TarUtils.java:168)
at org.apache.commons.compress.archivers.tar.TarArchiveEntry.parseTarHeader(TarArchiveEntry.java:1007)
at org.apache.commons.compress.archivers.tar.TarArchiveEntry.parseTarHeader(TarArchiveEntry.java:996)
at org.apache.commons.compress.archivers.tar.TarArchiveEntry.<init>(TarArchiveEntry.java:326)
at org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:278)
... 23 more
2018-05-03 10:27:06,875 [ 137782] INFO - .skeletons.PySkeletonGenerator - Sources and skeletons are loaded in 8099 millis.
2018-05-03 10:27:06,878 [ 137785] INFO - ns.python.sdk.PythonSdkUpdater - Bogus sys.path entry /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/201544331
2018-05-03 10:27:06,879 [ 137786] INFO - ns.python.sdk.PythonSdkUpdater - Bogus sys.path entry /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/-2145795944
2018-05-03 10:27:06,879 [ 137786] INFO - ns.python.sdk.PythonSdkUpdater - Bogus sys.path entry /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/-154863933
2018-05-03 10:27:06,879 [ 137786] INFO - ns.python.sdk.PythonSdkUpdater - Bogus sys.path entry /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/918732847
2018-05-03 10:27:06,880 [ 137787] INFO - ns.python.sdk.PythonSdkUpdater - Bogus sys.path entry /home/dke/.PyCharm2018.1/system/remote_sources/-1088670127/1560306194
2018-05-03 10:27:06,880 [ 137787] INFO - ns.python.sdk.PythonSdkUpdater - Binary skeletons directory for SDK Remote Python 2.7.14 Docker (<container>:latest) (docker://<container>:latest/python)): /home/dke/.PyCharm2018.1/system/python_stubs/-1088670127
2018-05-03 10:27:06,880 [ 137787] INFO - ns.python.sdk.PythonSdkUpdater - User skeletons directory for SDK Remote Python 2.7.14 Docker (<container>:latest) (docker://<container>:latest/python)): /opt/pycharm-professional/helpers/python-skeletons
2018-05-03 10:27:06,883 [ 137790] INFO - ns.python.sdk.PythonSdkUpdater - Performing background scan of packages for SDK Remote Python 2.7.14 Docker (<container>:latest) (docker://<container>:latest/python)
2018-05-03 10:27:06,924 [ 137831] INFO - .CloudSilentLoggingHandlerImpl - Creating container...

```