1577647 - match for failure line part at a position where it doesn't match

Status: NEW

(Tree Management :: Treeherder, defect)

Description

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://treeherder.mozilla.org/#/jobs?repo=autoland&selectedJob=263602377&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=614c7ff5c423c779450d2c4f24e3cc18364deaa9

has the failure line

TEST-UNEXPECTED-FAIL | toolkit/components/thumbnails/test/browser_thumbnails_update.js | we have a green thumbnail - Got 0,0,0, expected 0,255,0

One of the suggested bugs is
Intermittent toolkit/components/thumbnails/test/browser_thumbnails_update.js | we have a green thumbnail - Got 255,0,0, expected 0,255,0

The first 255 is highlighted in bold like it would match but it shouldn't because in the error message, there is a 0 in its place.