[llvm-bugs] [Bug 39644] New: namespaces inside other unnamed namespaces can cause conflicts in modular builds

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39644

            Bug ID: 39644
           Summary: namespaces inside other unnamed namespaces can cause
                    conflicts in modular builds
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Modules
          Assignee: unassignedclangbugs at nondot.org
          Reporter: andrewjcg at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Having two different blocks with the same namespace inside unnamed namespaces
which cross module binaries trigger build errors, presumably because the two
namespaces are completely separate and so conflict.

Repro: https://reviews.llvm.org/differential/diff/173801/

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