Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Devscripts/Uscan/WatchLine.pm line 868.
uscan warn: In debian/watch no matching hrefs for version 4.1 in watch line
https://github.com/brettwooldridge/SparseBitSet/tags .*/(?:.*?)([\d\.]+)\.tar\.gz
Looking for upstream 4.1 in upstream branch <RemoteGitBranch('https://github.com/brettwooldridge/SparseBitSet.git/', 'master')>.
No upstream upstream-revision format specified, trying tag:4.1
No upstream upstream-revision format specified, trying tag:sparsebitset-4.1
No upstream upstream-revision format specified, trying tag:v4.1
No upstream upstream-revision format specified, trying tag:v.4.1
No upstream upstream-revision format specified, trying tag:release-4.1
No upstream upstream-revision format specified, trying tag:4_1_release
No upstream upstream-revision format specified, trying tag:4_1
No upstream upstream-revision format specified, trying tag:version-4.1
No upstream upstream-revision format specified, trying tag:sparsebitset-4_1-release
No upstream upstream-revision format specified, trying tag:sparsebitset-v4.1
brz: ERROR: Unable to find the needed upstream tarball for package sparsebitset, version 4.1.