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graphic: 0.858
instruction: 0.841
device: 0.793
vnc: 0.511
boot: 0.434
semantic: 0.428
socket: 0.127
mistranslation: 0.126
network: 0.073
other: 0.059
assembly: 0.026
KVM: 0.020
Data race with state field of ThreadPoolElement
Description of problem:
A data race in the access of `ThreadPoolElement` state field in `util/thread-pool.c` was identified using TSAN.
Steps to reproduce:
```sh
QEMU_BUILD_DIR=<path to the QEMU build directory>
QEMU_DIR=<path to the QEMU repository directory>
configure --enable-tsan --cc=clang --cxx=clang++ --enable-trace-backends=ust --enable-fdt=system --disable-slirp
make tests/unit/test-thread-pool
MALLOC_PERTURB_=111 G_TEST_SRCDIR=$QEMU_BUILD_DIR/tests/unit G_TEST_BUILDDIR=$QEMU_BUILD_DIR/tests/unit $QEMU_BUILD_DIR/tests/unit/test-thread-pool --tap -k
```
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