[Bug]: thread-safety analysis false positive for trivial scope in for-each

[MBkkt]

Describe the issue

thread-safety analysis false positive for trivial scope in for-each.
Probably bug in clang...

Steps to reproduce the problem

https://godbolt.org/z/W1vaPce63

What version of Abseil are you using?

latest

What operating system and version are you using?

linux

What compiler and version are you using?

clang 20

What build system are you using?

cmake

Additional context

<source>:9:1: error: mutex 'm' is still held at the end of function [-Werror,-Wthread-safety-analysis]
    9 | }
      | ^
<source>:6:26: note: mutex acquired here
    6 |     for (absl::MutexLock lock{&m}; int& x : data) {
      |                          ^

#include <absl/synchronization/mutex.h>

void bar(int&);

void foo_for(absl::Mutex& m, std::span<int> data) {
    for (absl::MutexLock lock{&m}; int& x : data) {
        bar(x);
    }
}

int main () {}