Debugging TimerOutputs.jl crashes

[KristofferC]

Using master of MRH.

This might be the same as e.g. #61 so I'll just file this one as a last case so you have some things to check off:

julia> using MagneticReadHead, TimerOutputs

julia> function f()
           to = TimerOutput()
           @timeit to "sleeping" sleep(1)
           print_timer(to)
       end
f (generic function with 1 method)

julia> f()
 ───────────────────────────────────────────────────────────────────
                            Time                   Allocations      
                    ──────────────────────   ───────────────────────
  Tot / % measured:      1.71s / 58.7%           28.5MiB / 0.00%    

 Section    ncalls     time   %tot     avg     alloc   %tot      avg
 ───────────────────────────────────────────────────────────────────
 sleeping        1    1.00s   100%   1.00s      192B  100%      192B
 ───────────────────────────────────────────────────────────────────
 
julia> @run f()
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Any, (43297,)}[SSAValue(1), SSAValue(2), SSAValue(3), SSAValue(4), ...
record_backtrace at /Users/osx/buildbot/slave/package_osx64/build/src/task.c:217 [inlined]
jl_throw at /Users/osx/buildbot/slave/package_osx64/build/src/task.c:417
jl_bounds_error_ints at /Users/osx/buildbot/slave/package_osx64/build/src/rtutils.c:183
getindex at ./array.jl:729 [inlined]
renumber_ssa at ./compiler/ssair/slot2ssa.jl:65 [inlined]
#241 at ./compiler/ssair/slot2ssa.jl:74 [inlined]
ssamap at ./compiler/ssair/ir.jl:429
renumber_ssa! at ./compiler/ssair/slot2ssa.jl:74 [inlined]
renumber_ssa! at ./compiler/ssair/slot2ssa.jl:73
construct_ssa! at ./compiler/ssair/slot2ssa.jl:859
just_construct_ssa at ./compiler/ssair/driver.jl:109
run_passes at ./compiler/ssair/driver.jl:114
optimize at ./compiler/optimize.jl:164

[oxinabox]

Smaller MWE:

using MagneticReadHead, TimerOutputs
t = TimerOutput()
@run print_timer(t)