[jogibear9988]

A value returned by delegate invocation cannot currently be used reliably as a ref argument. Materialize the value once in a typed temporary. Preserve genuine byref-return aliases, inlined invocation results and discarded-result effects.

Validation

The focused regression reproduces a failure or crash on master a0950432 and passes with this change. Release solution build passes with zero warnings/errors. Both Standard and LightExpression native suites run.

Runtime	TestX passed	Legacy passed
.NET 10	363	1,756
.NET 8	363	1,755
.NET Framework 4.7.2	342	1,639

Measurements

Compare master a0950432 with this commit de1f8aab. Windows ARM64, Release; .NET 8.0.28 and 10.0.9. Compilation uses prebuilt trees; invocation uses precompiled delegates and excludes expression construction/compilation. Standard and LightExpression are measured separately.

Two fresh process rounds reverse version-loading order, pin execution to one logical CPU, disable tiered compilation, warm both versions, and alternate measurement order. Values below are medians across 14 samples per side (seven per round; 30 ms calibration target).

Measured compilation and invocation allocations match master on every control. Control delegate IL matches master.

Identical-master control runs also varied: compilation -15.2% to +23.4%, invocation -21.5% to +8.9%. Timings below are observations, not a speedup or universal performance-neutrality claim. Cases that fail or produce invalid IL on master have no meaningful before/after invocation ratio; the table uses executable controls that return the expected result in both versions. Framework correctness is tested above; its performance is not measured here.

All table pairs are master → this change. B/op is allocated bytes per operation.

.NET / API	Control	Compile ns/op	Compile B/op	Invoke ns/op	Invoke B/op
10 / Light	add_control	4,055 → 4,758	872 → 872	2.54 → 2.64	0 → 0
10 / Light	delegate_invoke	3,832 → 3,782	952 → 952	3.47 → 3.02	0 → 0
10 / Light	inlined_invoke	4,061 → 3,765	872 → 872	2.51 → 2.49	0 → 0
10 / Standard	add_control	3,810 → 4,159	872 → 872	2.36 → 2.31	0 → 0
10 / Standard	delegate_invoke	5,398 → 4,878	952 → 952	3.21 → 3.07	0 → 0
10 / Standard	inlined_invoke	4,816 → 4,623	872 → 872	2.47 → 2.43	0 → 0
8 / Light	add_control	1,212 → 1,284	872 → 872	2.47 → 2.33	0 → 0
8 / Light	delegate_invoke	1,514 → 1,688	952 → 952	2.95 → 2.97	0 → 0
8 / Light	inlined_invoke	1,223 → 1,470	872 → 872	2.49 → 2.41	0 → 0
8 / Standard	add_control	1,758 → 1,947	872 → 872	3.44 → 2.91	0 → 0
8 / Standard	delegate_invoke	2,219 → 1,975	952 → 952	3.13 → 3.14	0 → 0
8 / Standard	inlined_invoke	1,709 → 1,543	872 → 872	2.49 → 2.37	0 → 0