[gnutls-devel] GnuTLS | UB detected, but test suite stays silent (#878)

[Development of GNU's TLS library]

Tim Rühsen commented:


To reproduce:
```
export CC=clang
export CFLAGS="-O1 -g -fno-omit-frame-pointer -gline-tables-only -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=undefined,integer,nullability -fsanitize=address -fsanitize-address-use-after-scope -fsanitize-coverage=trace-pc-guard,trace-cmp"
./configure --disable-guile --enable-fuzzer-target --enable-static --disable-doc --disable-gcc-warnings --disable-hardware-acceleration
make clean
make
cd fuzz
make check
grep Sani *.log
```

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