run-tests: don't mask errors when a server fails to start
There are sporadic instances of this on Windows. They seem to happen more
frequently after the test machine is rebooted, although the only way to hit it
on my laptop is to loop certain tests with -j9 for hours. The problem with
masking out the specific failure is that there's no way to know if it's the same
line in the test that's failing, or if it is random.
The justification for adding this masking in 52e9e63f1495 was that the failures
occur regularly, but that's not the case anymore. The port number is still
printed, in case that turns out to be useful.
https://bz.mercurial-scm.org/619
$ hg init
$ echo a > a
$ hg ci -Ama
adding a
$ echo b > b
$ hg branch b
marked working directory as branch b
(branches are permanent and global, did you want a bookmark?)
$ hg ci -Amb
adding b
$ hg co -C 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
Fast-forward:
$ hg merge b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -Ammerge
Bogus fast-forward should fail:
$ hg merge b
abort: merging with a working directory ancestor has no effect
[255]
Even with strange revset (issue4465)
$ hg merge ::.
abort: merging with a working directory ancestor has no effect
[255]