v5.2 - Resolve possible memory leak in arcache (#117)

If the write miss thread local cache was enabled, a mistake
existed in the case where the write thread is under high pressure
which could lead to memory being leaked. Nodes are now wrapped
in a safe wrapper to ensure they can not be leaked.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "concread"
-version = "0.5.1"
+version = "0.5.2"
 authors = ["William Brown <william@blackhats.net.au>"]
 edition = "2021"
 description = "Concurrently Readable Data-Structures for Rust"
@@ -29,13 +29,18 @@ arcache = ["maps", "lru", "crossbeam-queue"]
 skinny = []
 hashtrie_skinny = []
 
-default = ["asynch", "ahash", "ebr", "maps", "arcache"]
+default = ["asynch", "ahash", "ebr", "maps", "arcache-is-hashtrie"]
+dhat-heap = ["dep:dhat"]
+
+arcache-is-hashmap = ["arcache"]
+arcache-is-hashtrie = ["arcache"]
 
 [dependencies]
 ahash = { version = "0.8", optional = true }
 crossbeam-utils = { version = "0.8.12", optional = true }
 crossbeam-epoch = { version = "0.9.11", optional = true }
 crossbeam-queue = { version = "0.3.6", optional = true }
+dhat = { version = "0.3.3", optional = true }
 lru = { version = "0.12", optional = true }
 serde = { version = "1.0", optional = true }
 smallvec = { version = "1.4", optional = true }
@@ -47,7 +52,6 @@ tracing = "0.1"
 [dev-dependencies]
 criterion = { version = "0.3", features = ["html_reports"] }
 rand = "0.8"
-time = "0.3"
 tracing-subscriber = { version = "0.3", features = ["env-filter", "std", "fmt"] }
 uuid = "1.0"
 function_name = "0.3"