Merge pull request #68643 from saehejkang/bridged-source-loc-assert-pos

[ASTGen]: Assert that the position is within buffer bounds for BridgedSourceLoc

Author: ahoppen

lib/ASTGen/Sources/ASTGen/Bridge.swift

@@ -20,12 +20,8 @@ extension BridgedSourceLoc {
     at position: AbsolutePosition,
     in buffer: UnsafeBufferPointer<UInt8>
   ) {
-    if let start = buffer.baseAddress,
-      position.utf8Offset >= 0 && position.utf8Offset < buffer.count {
-      self = SourceLoc_advanced(BridgedSourceLoc(raw: start), SwiftInt(position.utf8Offset))
-    } else {
-      self = nil
-    }
+    precondition(position.utf8Offset >= 0 && position.utf8Offset < buffer.count)
+    self = SourceLoc_advanced(BridgedSourceLoc(raw: buffer.baseAddress!), SwiftInt(position.utf8Offset))
   }
 }