README.email: Document `fail in 58948 REGR. vs. 63449'

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: Change an example number to improve clarity.

diff --git a/README.email b/README.email
index 992a57413c8c0a824fe78376e91795d4bb766cca..5de63ddd161ebf67248094eb7769db43269f5048 100644 (file)
--- a/README.email
+++ b/README.email
@@ -71,6 +71,24 @@ history.  Here are some examples:
       detect regressions of this test.  Perhaps the test has been
       recently introduced.
 
+   fail in 58948 REGR. vs. 43449
+
+      The results processor used 58948 (another flight testing the
+      just-tested version) to convince itself that some other test
+      failure is intermittent.  Look for other references to 58948 in
+      the report to see which those other test failures are.
+
+      However, in 58948, there were further failures.  In particular,
+      the step being reported here failed, and that failure could not
+      in turn be justified.
+
+      If this further failure is in a test job, this is usually
+      because the reported step did not run at all in the most recent
+      flight, usually because it was blocked by an earlier failure.
+      (Intermittent build job failures are never considered
+      justifiable because they prevent other tests from running and
+      can so conceal bugs.)
+
    fail in 58948 pass in 58965
    fail in 58948 like 37628