[DebugInfo][SILGen] Ensure "guard let" is lowered with a non-implicit location #70111
+18
−1
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Prior to this patch, a "guard let" was being lowered with an implicit debug location, causing it to be dropped in later stages of the compiler, and making it impossible to set a breakpoint in that line.
This was tracked down to a piece of code in
SILGenFunction::emitExprInto
, which takes an optional Location parameter that was being ignored in one code path.