[emfcompare-build] Build failed in Jenkins: clean-nightly #869

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See <https://ci.eclipse.org/emfcompare/job/clean-nightly/869/display/redirect>

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Started by upstream project "publish-nightly" build number 988
originally caused by:
 Started by upstream project "master-nightly" build number 767
 originally caused by:
  Started by an SCM change
Building in workspace <https://ci.eclipse.org/emfcompare/job/clean-nightly/ws/>
No credentials specified
 > /usr/local/bin/git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > /usr/local/bin/git config remote.origin.url /gitroot/emfcompare/org.eclipse.emf.compare-releng.git # timeout=10
Fetching upstream changes from /gitroot/emfcompare/org.eclipse.emf.compare-releng.git
 > /usr/local/bin/git --version # timeout=10
 > /usr/local/bin/git fetch --tags --progress /gitroot/emfcompare/org.eclipse.emf.compare-releng.git +refs/heads/*:refs/remotes/origin/*
 > /usr/local/bin/git rev-parse origin/master^{commit} # timeout=10
Checking out Revision 101043e93259bac910b44c71d6def3054cb32f5c (origin/master)
 > /usr/local/bin/git config core.sparsecheckout # timeout=10
 > /usr/local/bin/git checkout -f 101043e93259bac910b44c71d6def3054cb32f5c
Commit message: "[532181] Use curl -L"
 > /usr/local/bin/git rev-list --no-walk 101043e93259bac910b44c71d6def3054cb32f5c # timeout=10
[workspace] $ /bin/sh -xe /tmp/genie.emfcompare/jenkins5670808523174491740.sh
+ ./hudson-scripts/clean-nightly.sh 3.3.8 5
[INFO]     Cleaning up 'EMF Compare 3.3.8' nightly builds (will keep the 5 most recent) [clean-nightly.sh:29]
[INFO]     Removing nightly build '3.3.8.201907100940' from stream '3.3.8.x' [4_update-site-clean.sh:87]
Picked up JAVA_TOOL_OPTIONS: -Xmx2G -Djava.io.tmpdir=/tmp/genie.emfcompare
Picked up JAVA_TOOL_OPTIONS: -Xmx2G -Djava.io.tmpdir=/tmp/genie.emfcompare
[INFO]     Removing folder '/home/data/httpd/download.eclipse.org/modeling/emf/compare/updates/nightly/streams/3.3.8.x' as it has no children anymore [4_update-site-clean.sh:28]
[INFO]     Removing nightly build '3.3.8.201907100940' from stream '3.3.x' [4_update-site-clean.sh:90]
Picked up JAVA_TOOL_OPTIONS: -Xmx2G -Djava.io.tmpdir=/tmp/genie.emfcompare
Picked up JAVA_TOOL_OPTIONS: -Xmx2G -Djava.io.tmpdir=/tmp/genie.emfcompare
Picked up JAVA_TOOL_OPTIONS: -Xmx2G -Djava.io.tmpdir=/tmp/genie.emfcompare
Unable to read repository at file:/home/data/httpd/download.eclipse.org/modeling/emf/compare/updates/nightly/streams/3.3.x/latest/.
Usage: -location repositoryURI [-list] [-add repository-list] [-remove repository-list] [-repositoryName name] [-validate] [-failOnExists] [-compressed]
  -location        URI of composite repository to create / modify
  -list            Whether the list of children should be printed on the standard output
  -add             Comma separated list of repositories URI to add to the composite
  -remove          Comma separated list of repositories URI to remove from the composite
  -repositoryName  The name of the composite as it should appears to client
  -validate        Child repositories claiming to contain the same artifact are compared using the given comparator. Either 'org.eclipse.equinox.p2.repository.tools.jar.comparator' or 'org.eclipse.equinox.artifact.md5.comparator'
  -failOnExists    Whether we should fail if the repository already exists. (Default is false)
  -compressed      Whether the composite repository should compressed. (Default is false)
./hudson-scripts/init/4_update-site-clean.sh: line 38: latestUpdateSiteInStream[@]: unbound variable
Build step 'Execute shell' marked build as failure