[v3.62.12] Breaking Change: Expected RightBrace, found Identifier(println)

[noahgift]

Breaking Change Description

Error Message:

✗ Syntax error: Expected RightBrace, found Identifier("println")

Affected Version: v1.89.0 → v3.62.12
Category: Syntax - Block/Statement
Files Affected: 1 (stream_processing_v189)

Scientific Impact

🟡 HIGH - Blocks stream processing validation

Blocked: Real-time stream processing algorithms, windowing, backpressure

Affected File

examples/data-science/007-stream-processing/implementations/ruchy/stream_processing_v189.ruchy

Investigation Needed

Status: ⏳ Needs detailed analysis

Next Steps:

1. Binary search through file to find exact error line
2. Compare with working v189 files
3. Identify specific syntax change
4. Create minimal reproducible example

Migration Priority

Target: Sprint 35 Day 4 (Oct 4)
Success: Restore 1 file → 66.3% success rate

Note: Different error than Issue #2 (function parameters)

See: `docs/BREAKING_CHANGES_V3.md` (Breaking Change #2)