kou commented on code in PR #50441:
URL: https://github.com/apache/arrow/pull/50441#discussion_r3591985248
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cpp/src/gandiva/precompiled/time_test.cc:
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@@ -67,17 +65,15 @@ TEST(TestTime, TestCastDateInvalidUnterminated) {
ExecutionContext context;
int64_t context_ptr = reinterpret_cast<int64_t>(&context);
- // The invalid-value error message is built from the raw input pointer. Hold
- // the input in an exactly-sized heap buffer with no trailing NUL so that
- // formatting the error must respect `length` instead of scanning for a NUL;
- // any over-read past the buffer trips AddressSanitizer.
- const char bytes[] = {'1', '9', '7', '2', '2', '2', '2', '2', '2', '2'};
- const auto length = static_cast<int32_t>(sizeof(bytes));
- std::unique_ptr<char[]> input(new char[length]);
- std::memcpy(input.get(), bytes, length);
-
- EXPECT_EQ(castDATE_utf8(context_ptr, input.get(), length), 0);
- EXPECT_EQ(context.get_error(), "Not a valid date value 1972222222");
+ // The invalid-value error message is built from the raw input pointer. Pass
a
+ // length that stops one byte short of the trailing sentinel so the formatter
+ // must respect `length` rather than scanning for a NUL; without the fix the
+ // sentinel leaks into the error message.
+ const std::string input = "197201234X";
Review Comment:
Oh, sorry. `snprintf(size)` truncates the error message without `%.*s`.
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