The branch stable/14 has been updated by kib:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=e2268518dff082d32b8399ccdac37ce3c597f178

commit e2268518dff082d32b8399ccdac37ce3c597f178
Author:     Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-01-14 22:11:48 +0000
Commit:     Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-01-21 00:24:55 +0000

    libpthread_init(): ensure curthread == NULL until set explicitly
    
    (cherry picked from commit 676be27133fa3296f3d9083732d8837a3eaa5ea4)
---
 lib/libthr/thread/thr_init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/libthr/thread/thr_init.c b/lib/libthr/thread/thr_init.c
index ff59288d919e..80f7c05ee5ce 100644
--- a/lib/libthr/thread/thr_init.c
+++ b/lib/libthr/thread/thr_init.c
@@ -332,6 +332,8 @@ _libpthread_init(struct pthread *curthread)
        /* Set the initial thread. */
        if (curthread == NULL) {
                first = 1;
+               /* Force _get_curthread() return NULL until set. */
+               _tcb_get()->tcb_thread = NULL;
                /* Create and initialize the initial thread. */
                curthread = _thr_alloc(NULL);
                if (curthread == NULL)

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