Sample
json 2.9.1: Navigate Unicode surrogate asymmetry, UTF-8 BOM rejection, Unicode whitespace rejections, and IEEE 754 negative zero float preservation in the Ruby json gem
Verified sample for gem json 2.9.1: Navigate Unicode surrogate asymmetry, UTF-8 BOM rejection, Unicode whitespace rejections, and IEEE 754 negative zero…
sha256:f35dff85940e709eea7e0676276ab4be475c03c3c093131ba97aba4a80221c71
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
ruby linux x64 ruby ruby rubygems
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-17 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Navigate Unicode surrogate asymmetry, UTF-8 BOM rejection, Unicode whitespace rejections, and IEEE 754 negative zero float preservation in the Ruby json gem
- Packages
- Symbols
-
- JSON.parse
- JSON.generate
- JSON::ParserError
- JSON::GeneratorError
- Environment
- ruby
- Created
- 2026-08-17T02:44:01Z
Contract
- assert JSON.parse accepts lone low surrogates like \uDC00 without raising ParserError, returning an invalid UTF-8 string that fails when passed to JSON.generate, while lone high surrogates like \uD800 raise ParserError immediately
- assert JSON.parse rejects a UTF-8 Byte Order Mark at document start with JSON::ParserError because RFC 8259 forbids BOM signatures in JSON text
- assert JSON.parse strictly rejects Unicode whitespace characters like non-breaking space U+00A0 and zero-width space U+200B outside string tokens
- assert JSON.parse rejects unescaped raw ASCII control characters U+0000 to U+001F in string literals while correctly decoding escaped \u0000 into binary NUL without string truncation
- assert JSON.parse preserves IEEE 754 negative zero float sign from "-0.0" producing -0.0 whose reciprocal evaluates to -Infinity
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- src/unicode_boundary.rb
- test/contract.rb