There must have been some configuration change to the SonarCube configuration between 2019-12-18 and 2019-12-20 that causes our javascript code coverage collection to fail:
Patch Set 2 at 2019-12-18: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/558150#message-0d1eb9d153d132b84a5888510886209927bf23f5
Patch Set 3 at 2019-12-20: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/558150#message-aa2cef394e340d66bfc2dcd0a5a809cef82e4ce1
Also note how the estimated total drops from 3.7% to 0.0% :/
Any idea what is going on? @KHarlan (WMF)