Eric's EFA + slice fix

[ByronHsu]

without slice fix (#82) it can hit assertion error

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 249 lines in your changes missing coverage. Please review.
✅ Project coverage is 6.5%. Comparing base (3c1c57d) to head (f8f1750).

Files with missing lines	Patch %	Lines
ibverbs/src/lib.rs	0.0%	237 Missing ⚠️
ibverbs-sys/src/lib.rs	0.0%	12 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
ibverbs-sys/src/lib.rs	19.7% <0.0%> (-3.5%)	⬇️
ibverbs/src/lib.rs	5.5% <0.0%> (-1.2%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.