runtests: don't stop if exception is thrown with 1 worker (JuliaLang#…

…23576)

And fix typo.

test/runtests.jl

@@ -59,14 +59,14 @@ cd(dirname(@__FILE__)) do
  resp = [e]
  end
  push!(results, (test, resp))
- if (isa(resp[end], Integer) && (resp[end] > max_worker_rss)) || isa(resp, Exception)
+ if resp[1] isa Exception || resp[end] > max_worker_rss
  if n > 1
  rmprocs(wrkr, waitfor=30)
  p = addprocs_with_testenv(1)[1]
  remotecall_fetch(include, p, "testdefs.jl")
  else
- # single process testing, bail if mem limit reached, or, on an exception.
- isa(resp, Exception) ? rethrow(resp) : error("Halting tests. Memory limit reached : $resp > $max_worker_rss")
+ # single process testing, bail if mem limit reached
+ resp[1] isa Exception || error("Halting tests. Memory limit reached : $resp > $max_worker_rss")
  end
  end
  if !isa(resp[1], Exception)