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2069be281c
Problem: libmpack encodes boundary values -129 and -32769 with wrong integer sizes: - -129 as int8 instead of int16 - -32769 as int16 instead of int32 because the boundary checks compare against the wrong values (e.g., lo < 0xffffff7f instead of lo < 0xffffff80). This caused data corruption: -129 would decode as 127. Solution: Fix off-by-one errors in the two's complement boundary constants: 0xffffff80 (-128, min int8) and 0xffff8000 (-32768, min int16). Fixes #37202 Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>