[llvm-bugs] [Bug 51262] New: "too many personalities to encode"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51262

            Bug ID: 51262
           Summary: "too many personalities  to encode"
           Product: lld
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: MachO
          Assignee: unassignedbugs at nondot.org
          Reporter: vyng at google.com
                CC: gkm at fb.com, jezreel at gmail.com,
                    llvm-bugs at lists.llvm.org, smeenai at fb.com

Repro:
<TODO: fill in here - unfortunately - I don't have a small repro case yet>

Symptom: 

Crash with "too many personalities(6) for compact unwind to encode".
Examining the personalities vector, I noticed that most of them were
"4294967295" (ie., uint32's max value), which is wildly out range of reasonable
values.

So maybe there's some bug in arithmetics somewhere?
I'll try to update the bug with a small repro case, but posting it here in case
it rings a bell to anyone...

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