[DRE-maint] Bug#1020435: ruby-prof: FTBFS on ppc64el

[Antonio Terceiro]

Control: tag -1 + unreproducible
Control: severity -1 important

Hi,

On Wed, Sep 21, 2022 at 07:20:31PM +0200, Sebastian Ramacher wrote:
> Source: ruby-prof
> Version: 1.4.3-1
> Severity: serious
> Tags: ftbfs
> Justification: fails to build from source (but built successfully in the past)
> X-Debbugs-Cc: sramacher at debian.org
> 
> https://buildd.debian.org/status/fetch.php?pkg=ruby-prof&arch=ppc64el&ver=1.4.3-1%2Bb1&stamp=1663720013&raw=0
> 
>   1) Failure:
> PrinterGraphTest#test_graph_results_sorting [/<<PKGBUILDDIR>>/test/printer_graph_test.rb:37]:
> Array [0.171, 0.171, 0.167, 0.167, 0.166, 0.164, 0.004, 0.004, 0.002, 0.0, 0.0, 0.0, 0.0, 0.17, 0.17, 0.0, 0.0, 0.169, 0.169, 0.0, 0.0] is not sorted.
> --- expected
> +++ actual
> @@ -1 +1 @@
> -[0.171, 0.171, 0.167, 0.167, 0.166, 0.164, 0.004, 0.004, 0.002, 0.0, 0.0, 0.0, 0.0, 0.17, 0.17, 0.0, 0.0, 0.169, 0.169, 0.0, 0.0]
> +[0.171, 0.171, 0.17, 0.17, 0.169, 0.169, 0.167, 0.167, 0.166, 0.164, 0.004, 0.004, 0.002, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
> 
> 
> 51 runs, 687 assertions, 1 failures, 0 errors, 0 skips
> rake aborted!
> Command failed with status (1): [ruby -w -I"test" /usr/share/rubygems-integration/all/gems/rake-13.0.6/lib/rake/rake_test_loader.rb "test/abstract_printer_test.rb" "test/alias_test.rb" "test/basic_test.rb" "test/call_tree_visitor_test.rb" "test/call_trees_test.rb" "test/duplicate_names_test.rb" "test/enumerable_test.rb" "test/exceptions_test.rb" "test/exclude_methods_test.rb" "test/exclude_threads_test.rb" "test/fiber_test.rb" "test/gc_test.rb" "test/line_number_test.rb" "test/marshal_test.rb" "test/multi_printer_test.rb" "test/no_method_class_test.rb" "test/printer_call_stack_test.rb" "test/printer_call_tree_test.rb" "test/printer_flat_test.rb" "test/printer_graph_html_test.rb" "test/printer_graph_test.rb" "test/printing_recursive_graph_test.rb" "test/profile_test.rb" "test/rack_test.rb" "test/singleton_test.rb" -v]
> /usr/share/rubygems-integration/all/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
> Tasks: TOP => default
> (See full trace by running task with --trace)
> ERROR: Test "ruby3.0" failed. Exiting.

Unfortunately I could not reproduce this on the ppc64el porterbox, even
trying the same random seed as the original build failure. I was
suspecting an random test failure, but I didn't see this after trying 50
builds in a row. In fact, just giving back the build on the buildd made
it succeed. I'm not saying there is no issue, so I am keeping this open
and maybe we will be able to figure it out at some point.

I hope you don't mind me downgrading this to important.
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