Hard Error/Force Quit on files with parentheses - ( )

Ran into an issue with the FTS initial index on my files.

I had a directory of files that all ended with "(YEAR)" - opening-parenthesis 4-digit-year closing-parenthesis - as the last part of the filename (e.g - "Training Manual (2001).pdf"). Whenever it got to one of those files, the initial index service would seem to freeze. Even after letting it run for more than a day on a single file it never progressed any further and would eventually not respond. The index would eventually force quit itself.

After renaming the files without parentheses (e.g. - "Training Manual 2001.pdf"), they indexed fine.

Before renaming, there was no error saved to the index log. There was nothing indicating that the parentheses caused the error, but I totally guessed that was the issue, and guessed right.

Before renaming:

┌─ Indexing  ────
│ Action: indexDocument
│ Provider: Files                Account: USERNAME
│ Document: 3067515
│ Info: application/pdf
│ Title: Path/To/Training Manual (2001).pdf
│ Content size: 7852544
│ Chunk:   1101/1277
│ Progress:    964/6511
└──
┌─ Results ────
│ Result:    539/539
│ Index: files:3067542
│ Status: ok
│ Message: {"_index":"nc_indexnextcloud","_id":"files:3067542","_version":1,"result":"created","_shards":{"total":2,"successful":1,"failed":0},"_seq_no"
│ :41204,"_primary_term":2}
│ 
└──
┌─ Errors ────
│ Error:      0/0
│ Index: 
│ Exception: 
│ Message: 
│ 
│ 
└──

## x:first result ## c/v:prec/next result ## b:last result
## f:first error ## h/j:prec/next error ## d:delete error ## l:last error
## q:quit ## p:pause 
Force Quit

Note the "Force Quit" above

occ fulltextsearch:document:status -u USERNAME files 3067515

In DocumentStatus.php line 199:
                                                               
  Specify a valid status: IGNORE, INDEX, DONE, REMOVE, FAILED  

occ fulltextsearch:document:provider -- USERNAME files 3067515

(did not respond and produced no output)

After Renaming (and indexing successfully):

occ fulltextsearch:document:status -u USERNAME -j -- files 3067515

{
    "ownerId": "USERNAME",
    "providerId": "files",
    "collection": "local",
    "source": "files_local",
    "documentId": "3067515",
    "lastIndex": 1713212033,
    "errors": [],
    "errorCount": 0,
    "status": 1,
    "options": {
        "_files_pdf": "1",
        "_files_local": "1"
    }
}

{
    "id": "3067515",
    "providerId": "files",
    "access": {
        "ownerId": "USERNAME",
        "viewerId": "",
        "users": [],
        "groups": [],
        "circles": [],
        "links": []
    },
    "modifiedTime": 1485997542,
    "title": "Path/To/Training Manual 2001.pdf",
    "link": "http:\/\/localhost\/index.php\/f\/3067515",
    "index": {
        "ownerId": "USERNAME",
        "providerId": "files",
        "collection": "",
        "source": "files_local",
        "documentId": "3067515",
        "lastIndex": 0,
        "errors": [],
        "errorCount": 0,
        "status": 28,
        "options": {
            "_files_pdf": "1",
            "_files_local": "1"
        }
    },
    "source": "files_local",
    "info": {
        "share_names": {
            "USERNAME": "Path\/To\/Training Manual 2001.pdf"
        }
    },
    "hash": "",
    "contentSize": 7852544,
    "tags": [],
    "metatags": [
        "files_local"
    ],
    "subtags": [],
    "more": {
        "creationTime": 1713211957,
        "accessedTime": 1713210132
    },
    "excerpts": [],
    "score": ""
}

Reproduce the failure with the reported occ fulltextsearch commands and a PDF whose filename ends in a four-digit year in parentheses. Compare indexing behavior and status output before and after renaming the file, then identify why the initial index stops without recording an error. Done means parenthesized filenames index successfully and the document status remains valid.