Build freeze - CI timeout

[t-bltg]

Hi, we're trying Documenter@0.27.4 with ansicolor in https://github.com/JuliaPlots/PlotDocs.jl, but the build freezes on expansion of markdown templates.
I can reproduce this locally. Is there a way to debug the build other than setting env var JULIA_DEBUG=Documenter ?

See the corresponding issue: JuliaPlots/PlotDocs.jl#248.

[fredrikekre]

Are you saying it does not freeze if you use 0.27.4 with ansicolor = false?

[t-bltg]

Are you saying it does not freeze if you use 0.27.4 with ansicolor = false?

Nope, I'm just saying that it freezes with 0.27.4, but one major change is that we now use ansicolor=true.

I tried a few days ago with cd16ae1 before merging JuliaPlots/PlotDocs.jl#246 and it worked.
So I suppose that the regression that we hit:

1. is somewhere between cd16ae1 and release of 0.27.4 yesterday,
   ==> EDIT: weird, reverting back to cd16ae1 now also hangs !
2. is induced by an external dependency.

I'll try now with ansicolor=false to see what happens.
As expected, this does NOT seem to be related to setting ansicolor=true: with ansicolor=false it also hangs at ExpandTemplates: expanding markdown templates. + Running ExpanderPipeline on animations.md for the FIRST markdown page (out of 35).
You can reproduce with the procedure described in JuliaPlots/PlotDocs.jl#248 (comment).

And SIGINT are not intercepted, so I cannot get a backtrace, damn.

@BrianGun, yes, it seems that we hit the same bug.

[t-bltg]

Odd, I can now build locally, with #1656, and Documenter@0.27.4:
1033.287926 seconds (1.13 G allocations: 49.676 GiB, 2.55% gc time, 0.39% compilation time)

But it still fails on CI.

[fredrikekre]

But it still fails on CI.

Even if you enable @debug output?

[t-bltg]

Even if you enable @debug output?

We did enable @debug: https://github.com/JuliaPlots/Plots.jl/blob/f9a1e2e92de63826d02ec55ef03c7e3d8d1b120c/.github/workflows/docs.yml#L47

I'm trying to disable @info from https://github.com/JuliaPlots/PlotDocs.jl/blob/master/docs/src/animations.md, since it used to hang in the IOCapture.capture() block.

[t-bltg]

Narrowed down to JuliaPlots/Plots.jl#3664.

[mortenpi]

It looks like this is unrelated to Documenter then.

[t-bltg]

Not yet resolved, but yes, I guess it's reasonable to close this.