[Rafael-SOWNet]

Both compilers take Re and Im of a System.Numerics.Complex as one part alone, so a NaN in the other part was dropped. x / x at 0 compiles to NaN + NaN i. Its imaginary part is NaN with an imaginary part of 0, and the imaginary part of that is 0. So the compiled forms had a value where the interpreter, and the compiled x / x, have none. A NaN in either part is now the whole number's, as Im of a NaN double already was.

at x = 0	evaluated	FastExpression and LINQ, master	now
Im(Im(x / x))	NaN	<0; 0>	<NaN; 0>
Im(Re(x / x))	NaN	<0; 0>	<NaN; 0>
Im(Im(sqrt(x) / sqrt(x)))	NaN	<0; 0>	<NaN; 0>
Re(x) at 1 + NaN i		<1; 0>	<NaN; 0>

• Found among work/compilesweep's findings as Im(Im(min(x, x))) off the real line. No issue was filed.
• Re and Im first compiled in The conjugate, the argument, the parts and the Iverson bracket compile #2196, after 2.6.0, which refused them, so no released answer changes and there's no BREAKING-CHANGES.md entry.
• Five of the six new cases fail on master. Re(Im(x / x)) was already NaN and stays as a control. The suite, the trio, F#, AOT and the eight harnesses pass.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.76%. Comparing base (a1fb7ae) to head (73f4844).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2312      +/-   ##
==========================================
- Coverage   86.77%   86.76%   -0.01%     
==========================================
  Files         311      311              
  Lines       68199    68199              
  Branches    19821    19823       +2     
==========================================
- Hits        59178    59174       -4     
- Misses       4880     4883       +3     
- Partials     4141     4142       +1     

Flag	Coverage Δ
cpp	37.77% <ø> (ø)
csharp	87.31% <100.00%> (-0.01%)	⬇️
fsharp	32.97% <ø> (ø)
interactive	40.72% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
Sources/AngouriMath/Numerics/ComplexParts.cs	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

🚀 New features to boost your workflow:

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