Sometimes a unit-test crashes on the CI, but the developer cannot reproduce it locally (happens quite often to us in KDE PIM because of the complexity of the test environment we set up and the big difference between developer environment and the env on the builder). It would be nice if Jenkins could collect coredumps from the crashes and show *resolved* backtraces in the web UI. It's not as useful as interactive debugging, but even just seeing the backtrace would be extremely useful to devs as it would make it possible for the developer identify the code that crashes and add more debugging outputs or what not.
Note that it is not enough to just publish the coredump files as they would not be applicable on the locally-built binaries. It's actually necessary to resolve the backtrace against the binary built by the CI and then show the backtrace.