[llvm-bugs] [Bug 46153] New: Emit error if removing symbol table referenced by SHT_GROUP section

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46153

            Bug ID: 46153
           Summary: Emit error if removing symbol table referenced by
                    SHT_GROUP section
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: llvm-objcopy/strip
          Assignee: unassignedbugs at nondot.org
          Reporter: jh7370.2008 at my.bristol.ac.uk
                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

SHT_GROUP sections contain a reference to a symbol indicating their "signature"
symbol. The symbol table containing this symbol is referred to by the group
section's sh_link field. If llvm-objcopy is instructed to remove the symbol
table, it should emit an error, just like it does for most other section types
referencing a section via the sh_link field.

The problem is that the group section does not use Section class's
removeSectionReferences method, nor does it provide its own safety checking.

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