Reload fell back to L3

An edit that could have been patched in place (L1/L2, tens of milliseconds) was applied as a full module swap (L3, a few hundred milliseconds) instead. The message names the reason the compile server or the runtime gave.

#Common causes

• A changed method contains a lambda, local function or LINQ query (EnC deltas for closures crashed the runtime in S2, so they always take L3).
• A declaration changed: a signature, a struct field, an attribute or a virtual member.
• A constructor, field initializer, iterator or async method changed.
• The module was cold (built optimized); its first edit makes it hot.
• A debugger is attached, so the runtime refuses EnC deltas.
• A module this one references changed its public surface.

#Fixes

• Keep hot-path edits to plain method bodies; move lambdas into named methods when you iterate on them.

• Detach the debugger while iterating.

• Expect one L3 per module after a cold start; later body edits take L1.

• Code: ARA2021

• Constant: RELOAD_ESCALATED

• Reported by: ara-script