[llvm-bugs] [Bug 34157] New: Please backport lit regression fixes to release_50 branch

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34157

            Bug ID: 34157
           Summary: Please backport lit regression fixes to release_50
                    branch
           Product: new-bugs
           Version: 5.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: mgorny at gentoo.org
                CC: llvm-bugs at lists.llvm.org, modocache at gmail.com,
                    rnk at google.com
            Blocks: 33849

lit has regressed a lot since the 4.0.0 release. We've managed to fix it in
master, and it'd be really good to backport at least the most important fixes.


The minimal set needed to remove the regressions includes, in order:

  309044 [lit] Fix UnboundLocalError for invalid shtest redirects
  309071 [lit] Attempt to fix Python unittest adaptor logic
  309120 Revert "[lit] Remove dead code not referenced in the LLVM SVN repo."
  309122 [lit] Fix type error for parallelism groups
  309140 Fix LIT test breakage
  309227 [lit] Fix race between shtest-shell and max-failures tests

With those patches applied, lit tests reliably pass 100% again for me.

There are more potential backports but only those are strictly necessary to fix
regressions on Gentoo. Others include a lot of Windows fixes, a few more corner
case fixes and a CMake target to run lit tests. Those I'd rather leave to
Brian's and Reid's judgement.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=33849
[Bug 33849] [meta] 5.0.0 Release Blockers
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