Thread: pgsql: Fix convert_case(), introduced in 5c40364dd6.

Fix convert_case(), introduced in 5c40364dd6.

Check source length before checking for NUL terminator to avoid
reading one byte past the string end. Also fix unreachable bug when
caller does not expect NUL-terminated result.

Add unit test coverage of convert_case() in case_test.c, which makes
it easier to reproduce the valgrind failure.

Discussion: https://postgr.es/m/7a9fd36d-7a38-4dc2-e676-fc939491a95a@gmail.com
Reported-by: Alexander Lakhin

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/503c0ad976f5e4ada2d1b47ae05aa7133351b645

Modified Files
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src/common/unicode/case_test.c | 101 +++++++++++++++++++++++++++++++++++++++--
src/common/unicode_case.c      |   6 +--
2 files changed, 101 insertions(+), 6 deletions(-)