[insaf021]

BaseRuleFactory.getRule reads and writes the pointsAndWeightsDouble TreeMap outside the lock that guards getRuleInternal, and factories are shared (IterativeLegendreGaussIntegrator holds a static GaussIntegratorFactory), so concurrent requests for different point counts corrupt the map; the new test, wrapped in assertTimeoutPreemptively as suggested on #340, fails on master with TreeMap NPEs ("Cannot read field "right" because "l" is null") or a 30s timeout from a lookup spinning in TreeMap.getEntry, and passes once getRule is synchronized.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.22%. Comparing base (f554608) to head (683841b).
⚠️ Report is 401 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #343      +/-   ##
============================================
+ Coverage     86.54%   87.22%   +0.67%     
+ Complexity     9787       91    -9696     
============================================
  Files           532      499      -33     
  Lines         35516    33530    -1986     
  Branches       6194     5851     -343     
============================================
- Hits          30738    29247    -1491     
+ Misses         3518     3164     -354     
+ Partials       1260     1119     -141     

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