[llvm-bugs] [Bug 51877] New: Copying MachO binary triggers assertion failure on section offset

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51877

            Bug ID: 51877
           Summary: Copying MachO binary triggers assertion failure on
                    section offset
           Product: tools
           Version: trunk
          Hardware: All
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: llvm-objcopy/strip
          Assignee: unassignedbugs at nondot.org
          Reporter: d.c.ddcc at gmail.com
                CC: alexander.v.shaposhnikov at gmail.com,
                    jake.h.ehrlich at gmail.com,
                    jh7370.2008 at my.bristol.ac.uk,
                    llvm-bugs at lists.llvm.org, rupprecht at google.com

Created attachment 25263
  --> https://bugs.llvm.org/attachment.cgi?id=25263&action=edit
yaml reproducer

Handling of section offsets for MachO binaries seems to be incorrect. I get the
following assertions:

((S->Offset != 0) && "Non-zero-fill section's offset cannot be zero"), function
totalSize, file MachOWriter.cpp, line 140.

(Sec->Offset && "Section offset can not be zero"), function writeSections, file
MachOWriter.cpp, line 268.

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