[llvm-bugs] [Bug 47117] New: "CommandLine Error: Option 'filter' registered more than once!" crash on startup in applications using libclang

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47117

            Bug ID: 47117
           Summary: "CommandLine Error: Option 'filter' registered more
                    than once!" crash on startup in applications using
                    libclang
           Product: clang
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: libclang
          Assignee: unassignedclangbugs at nondot.org
          Reporter: bero at lindev.ch
                CC: klimek at google.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Several applications that use (dynamically linked) libclang crash on startup
with libclang 11-rc1, including doxygen and the Qt6 version of lupdate.

$ ./bin/doxygen 
: CommandLine Error: Option 'filter' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
Aborted (core dumped)

Doxygen isn't doing anything funny like mixing shared and static libraries.
The crash seems to happen in a global constructor in libclang, before even
doxygen's main() is called.

#0  0x00007ffff3dd386f in raise () from /lib64/libc.so.6
#1  0x00007ffff3db9538 in abort () from /lib64/libc.so.6
#2  0x00007fffedc4cb39 in llvm::report_fatal_error(llvm::Twine const&, bool) ()
from /usr/lib64/libLLVMSupport.so.11.0
#3  0x00007fffedc4c978 in llvm::report_fatal_error(char const*, bool) () from
/usr/lib64/libLLVMSupport.so.11.0
#4  0x00007fffedc32904 in ?? () from /usr/lib64/libLLVMSupport.so.11.0
#5  0x00007fffedc24044 in ?? () from /usr/lib64/libLLVMSupport.so.11.0
#6  0x00007fffedc2207d in llvm::cl::Option::addArgument() () from
/usr/lib64/libLLVMSupport.so.11.0
#7  0x00007ffff76ff910 in ?? () from /usr/lib64/libclang-cpp.so.11.0
#8  0x00007ffff7702da6 in ?? () from /usr/lib64/libclang-cpp.so.11.0
#9  0x00007ffff7fe1f0e in call_init () from /lib64/ld-linux-x86-64.so.2
#10 0x00007ffff7fe1fec in _dl_init () from /lib64/ld-linux-x86-64.so.2
#11 0x00007ffff7fd20ca in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#12 0x0000000000000001 in ?? ()
#13 0x00007fffffffd8db in ?? ()
#14 0x0000000000000000 in ?? ()

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