Andreas Schwab

BUG: pandas.to_datetime fails to handle numpy.nan on riscv64 due to dependency on undefined behaviour

27

### Pandas version checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of...

Handle NaNs when decoding times (failures on riscv64)

9

### What happened? FAILED xarray/tests/test_backends.py::TestScipyInMemoryData::test_roundtrip_numpy_datetime_data FAILED xarray/tests/test_backends.py::TestScipyFileObject::test_roundtrip_numpy_datetime_data FAILED xarray/tests/test_backends.py::TestGenericNetCDFData::test_roundtrip_numpy_datetime_data FAILED xarray/tests/test_backends.py::TestScipyFilePath::test_roundtrip_numpy_datetime_data = 4 failed, 4636 passed, 5632 skipped, 19 xfailed, 22 xpassed, 38 warnings in 266.18s (0:04:26) = ### What...

Don't cast NaN to integer

7

Do not try to convert NaN to integer type, as the operation is undefined and results in random values. This fixes all testsuite failures.

The limits of char are architecture dependent, and all modern architectures make it unsigned. Fixes issue 253.

g++ -o /home/abuild/rpmbuild/BUILD/node-v20.11.0/out/Release/obj.target/v8_compiler/deps/v8/src/compiler/add-type-assertions-reducer.o ../deps/v8/src/compiler/add-type-assertions-reducer.cc '-D_GLIBCXX_USE_CXX11_ABI=1' '-DNODE_OPENSSL_CONF_NAME=nodejs_conf' '-DNODE_OPENSSL_CERT_STORE' '-DICU_NO_USER_DATA_OVERRIDE' '-DV8_GYP_BUILD' '-DV8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=64' '-D__STDC_FORMAT_MACROS' '-DV8_TARGET_ARCH_RISCV64' '-D__riscv_xlen=64' '-DCAN_USE_FPU_INSTRUCTIONS' '-DV8_HAVE_TARGET_OS' '-DV8_TARGET_OS_LINUX' '-DV8_EMBEDDER_STRING="-node.17"' '-DENABLE_DISASSEMBLER' '-DV8_PROMISE_INTERNAL_FIELD_COUNT=1' '-DV8_ENABLE_PRIVATE_MAPPING_FORK_OPTIMIZATION' '-DOBJECT_PRINT' '-DV8_INTL_SUPPORT' '-DV8_ATOMIC_OBJECT_FIELD_WRITES' '-DV8_ENABLE_LAZY_SOURCE_POSITIONS' '-DV8_USE_SIPHASH' '-DV8_SHARED_RO_HEAP' '-DV8_WIN64_UNWINDING_INFO' '-DV8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH' '-DV8_USE_ZLIB' '-DV8_ENABLE_TURBOFAN'...

: In file included from /home/abuild/rpmbuild/BUILD/netgen-6.2.2301/libsrc/core/simd.hpp:12, from /home/abuild/rpmbuild/BUILD/netgen-6.2.2301/libsrc/core/ngcore.hpp:16: /home/abuild/rpmbuild/BUILD/netgen-6.2.2301/libsrc/core/simd_generic.hpp: In instantiation of 'ngcore::SIMD::SIMD(const T ...) [with T = {ngcore::SIMD, ngcore::SIMD}; int N = 4]': /home/abuild/rpmbuild/BUILD/netgen-6.2.2301/libsrc/core/simd.hpp:56:42: required from here /home/abuild/rpmbuild/BUILD/netgen-6.2.2301/libsrc/core/simd_generic.hpp:324:56: error:...