Intermittent test failure

[timholy]

I'm seeing testall fail occasionally with an error like this one:

exception on 5: ERROR: type: subtype: expected Type{T<:Top}, got (DataType,(Expr,Array{Any,1}))
 in typeseq at reflection.jl:42
 in typeinf at inference.jl:1115
 in typeinf_ext at inference.jl:1092
 in PriorityQueue at collections.jl:133
 in PriorityQueue at collections.jl:159 (repeats 2 times)
 in runtests at /home/tim/src/julia/test/testdefs.jl:5
 in anonymous at multi.jl:834
 in run_work_thunk at multi.jl:575
 in anonymous at task.jl:834
while loading priorityqueue.jl, in expression starting on line 56
ERROR: type: subtype: expected Type{T<:Top}, got (DataType,(Expr,Array{Any,1}))
 in anonymous at multi.jl:1384
while loading priorityqueue.jl, in expression starting on line 56
while loading /home/tim/src/julia/test/runtests.jl, in expression starting on line 21

make[1]: *** [all] Error 1
make: *** [testall] Error 2

If memory serves, it's usually in PriorityQueue code. At least once when this happened, there was a single process still left running for several minutes after the failure (eventually I killed it).

Just trying make testall a second time often works, so this is one of those awful intermittent failures.

julia> versioninfo()
Julia Version 0.3.0-prerelease+392
Commit 43d9445* (2013-12-11 05:10 UTC)
Platform Info:
  System: Linux (x86_64-linux-gnu)
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY)
  LAPACK: libopenblas
  LIBM: libopenlibm

[Keno]

Same issue as #5069. @vtjnash found the root cause. I'll see if I can get a fix in.

[staticfloat]

I'm going to close this as a dupe. Thanks for the report Tim!

[timholy]

Shoot, I had forgotten about that, and didn't use the error message in my search.