# Function erroring inside \`@testset\` but not outside

**URL:** <https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064>\
**Category:** General Usage\
**Created:** [September 25, 2017, 3:23pm UTC](https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064 "2017-09-25T15:23:46Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [September 25, 2017, 3:23pm UTC](https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064/1 "2017-09-25T15:23:46Z")

</div>

On Julia master, this works:

```julia
julia> begin
           ptr = cfunction(x -> x*x, Cdouble, Tuple{Cdouble})
           g(x) = ccall(ptr, Cdouble, (Cdouble,), x)
           g(3.0)
       end
9.0

```

but if this is wrapped in a `@testset`, it errors badly:

```julia
julia> Base.Test.@testset begin
           ptr = cfunction(x -> x*x, Cdouble, Tuple{Cdouble})
           g(x) = ccall(ptr, Cdouble, (Cdouble,), x)
           g(3.0)
       end
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Any, 1}[Expr(:return, Expr(:foreigncall, Expr(:block, SSAValue(1) = Expr(:call, Core.getfield, SlotNumber(id=1), :(:ptr))::Any, Expr(:if, Expr(:call, Core.isdefined, SSAValue(1), :(:contents))::Any, nothing, Expr(:block, <newvar #<3>>, SlotNumber(id=3))::Any)::Any, Expr(:call, Core.getfield, SSAValue(1), :(:contents))::Any)::Any, Float64, svec(Float64), :(:ccall), 1, SlotNumber(id=2))::Float64)::Any], i=(0,))
rec_backtrace at /home/mose/repo/julia/src/stackwalk.c:87
record_backtrace at /home/mose/repo/julia/src/task.c:246
jl_throw at /home/mose/repo/julia/src/task.c:568
jl_bounds_error_ints at /home/mose/repo/julia/src/rtutils.c:182
getindex at ./array.jl:768
_getfield_elim_pass! at ./inference.jl:5599
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
_getfield_elim_pass! at ./inference.jl:5583
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
_getfield_elim_pass! at ./inference.jl:5583
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
_getfield_elim_pass! at ./inference.jl:5583
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
getfield_elim_pass! at ./inference.jl:5576
optimize at ./inference.jl:3402
typeinf at ./inference.jl:3303
typeinf_frame at ./inference.jl:2984 [inlined]
typeinf_code at ./inference.jl:3066
jlcall_typeinf_code_794 at /home/mose/repo/julia/usr/lib/julia/sys.so (unknown line)
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
typeinf_ext at ./inference.jl:3105
jlcall_typeinf_ext_0 at /home/mose/repo/julia/usr/lib/julia/sys.so (unknown line)
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
jl_apply at /home/mose/repo/julia/src/julia.h:1451 [inlined]
jl_apply_with_saved_exception_state at /home/mose/repo/julia/src/rtutils.c:249
jl_type_infer at /home/mose/repo/julia/src/gf.c:263
jl_compile_for_dispatch at /home/mose/repo/julia/src/gf.c:1691
jl_compile_method_internal at /home/mose/repo/julia/src/julia_internal.h:334 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:381 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
macro expansion at ./REPL[1]:4 [inlined]
macro expansion at ./test.jl:942 [inlined]
anonymous at ./<missing> (unknown line)
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_toplevel_eval_flex at /home/mose/repo/julia/src/toplevel.c:628
jl_toplevel_eval_in at /home/mose/repo/julia/src/builtins.c:625
eval at ./repl/REPL.jl:3
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
eval_user_input at ./repl/REPL.jl:69
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
macro expansion at ./repl/REPL.jl:100 [inlined]
#1 at ./event.jl:96
jl_call_fptr_internal at /home/mose/repo/julia/src/julia_internal.h:366 [inlined]
jl_call_method_internal at /home/mose/repo/julia/src/julia_internal.h:385 [inlined]
jl_apply_generic at /home/mose/repo/julia/src/gf.c:1980
jl_apply at /home/mose/repo/julia/src/julia.h:1451 [inlined]
start_task at /home/mose/repo/julia/src/task.c:268
unknown function (ip: 0xffffffffffffffff)
test set: Error During Test
  Got an exception of type ErrorException outside of a @test
  error compiling g: unsupported or misplaced expression "block" in function g
  Stacktrace:
   [1] macro expansion at ./REPL[1]:4 [inlined]
   [2] macro expansion at ./test.jl:942 [inlined]
   [3] anonymous at ./<missing>:?
   [4] eval(::Module, ::Expr) at ./repl/REPL.jl:3
   [5] eval_user_input(::Any, ::Base.REPL.REPLBackend) at ./repl/REPL.jl:69
   [6] macro expansion at ./repl/REPL.jl:100 [inlined]
   [7] (::getfield(Base.REPL, Symbol("##1#2")){Base.REPL.REPLBackend})() at ./event.jl:96
Test Summary: | Error Total
test set | 1 1
ERROR: Some tests did not pass: 0 passed, 0 failed, 1 errored, 0 broken.

```

Am I doing something wrong? Note that this used to work in Julia 0.5 and 0.6, with the due change to `cfunction` definition.

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [September 25, 2017, 10:48pm UTC](https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064/2 "2017-09-25T22:48:16Z")

</div>

Git bisect tells me that the error appears after [https://github.com/JuliaLang/julia/pull/23698](https://github.com/JuliaLang/julia/pull/23698). This isn’t marked as a breaking change and I can’t see why what I’m doing should be wrong, but please, if it’s wrong do let me know.

---

<div class="post-metadata">

**Author:** ![mschauer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mschauer/32/13946_2.png) [@mschauer](https://discourse.julialang.org/u/mschauer)\
**Post date:** [September 26, 2017, 5:42am UTC](https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064/3 "2017-09-26T05:42:55Z")

</div>

At first glance this seems to be related to [https://github.com/JuliaLang/julia/issues/23866](https://github.com/JuliaLang/julia/issues/23866) . There they might be interested about the bisection result.

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [September 26, 2017, 12:36pm UTC](https://discourse.julialang.org/t/function-erroring-inside-testset-but-not-outside/6064/4 "2017-09-26T12:36:59Z")

</div>

It turned out it was a different issue. Opened a new issue on GitHub: [https://github.com/JuliaLang/julia/issues/23878](https://github.com/JuliaLang/julia/issues/23878).