[jogibear9988]

Discarding a member initializer must still construct its object and evaluate assignment values. Clear outer result/address flags while emitting values, then discard the completed initializer result.

Class and struct initializers, field/property assignments, constructor and RHS effects, and compiler flags. Regressions require strict FEC compilation. Native suites cover Standard and LightExpression.

Validation

Local validation uses master baseline 094d067 plus this change. Release solution build: zero warnings/errors.

Runtime	TestX groups	Legacy tests
.NET 10	489 passed	1,756 passed
.NET 8	489 passed	1,755 passed
.NET Framework 4.7.2	468 passed	1,639 passed

Measurements

Master baseline 094d0678 → this change, Release, Windows ARM64, .NET 8.0.28 / 10.0.9. Compilation uses prebuilt trees; runtime measures invocation through the same wrapper. Two fresh process rounds with reversed load order, seven samples per round, about 30 ms calibration, one logical CPU and tiered compilation disabled. Tables use the median of the two per-round medians.

The controls below produce correct results on master for their measured inputs. Newly supported trees have no valid before/after execution comparison because master rejects them, produces incorrect results or emits invalid IL. Timings include machine and JIT/code-placement variation; the unchanged add control helps show that variation. These observations do not prove universal performance neutrality.

net8.0 results (master → change)

API / workload	Compile ns	Invoke ns	Compile B/op	Invoke B/op
Standard / add_control	1387.6 → 1419.5	2.3 → 2.3	872.0 → 872.0	0.0 → 0.0
Standard / member_init	1681.2 → 1783.5	4.4 → 4.2	1064.1 → 1064.1	24.0 → 24.0
Standard / member_init_constructor	1846.9 → 1834.7	4.2 → 4.7	976.1 → 976.1	24.0 → 24.0
Light / add_control	1239.9 → 1205.5	2.3 → 2.4	872.0 → 872.0	0.0 → 0.0
Light / member_init	1946.0 → 1677.0	5.7 → 5.1	1064.0 → 1064.0	24.0 → 24.0
Light / member_init_constructor	1707.4 → 1578.2	4.7 → 5.0	976.0 → 976.0	24.0 → 24.0

net10.0 results (master → change)

API / workload	Compile ns	Invoke ns	Compile B/op	Invoke B/op
Standard / add_control	3825.7 → 3811.6	2.3 → 2.3	872.0 → 872.0	0.0 → 0.0
Standard / member_init	4762.3 → 4822.0	4.3 → 4.4	1064.2 → 1064.2	24.0 → 24.0
Standard / member_init_constructor	4659.5 → 4876.5	4.4 → 4.3	976.2 → 976.2	24.0 → 24.0
Light / add_control	2985.0 → 2913.1	2.3 → 2.2	872.0 → 872.0	0.0 → 0.0
Light / member_init	3467.4 → 3614.2	4.3 → 4.4	1064.0 → 1064.0	24.0 → 24.0
Light / member_init_constructor	3665.1 → 3457.0	4.3 → 4.9	976.0 → 976.0	24.0 → 24.0

Emitted IL differs in these measured workloads: none.
No measured allocation increase above 0.1 B/op in these controls.