feat: when deserialization of module from filesystem cache fails, remove from cache

crates/common/src/result.rs

@@ -33,10 +33,12 @@ pub enum WasmErrorInner {
     /// Wasmer failed to build a Module from wasm byte code.
     /// With the feature `wasmer_sys` enabled, building a Module includes compiling the wasm.
     ModuleBuild(String),
+    /// Wasmer failed to serialize a Module to bytes.
+    ModuleSerialize(String),
+    /// Wasmer failed to deserialize a Module from bytes.
+    ModuleDeserialize(String),
     /// The host failed to call a function in the guest.
     CallError(String),
-    /// Host attempted to interact with the module cache before it was initialized.
-    UninitializedSerializedModuleCache,
 }
 
 impl WasmErrorInner {
@@ -51,12 +53,12 @@ impl WasmErrorInner {
             | Self::ErrorWhileError
             // Bad memory is bad memory.
             | Self::Memory
-            // Failing to build the wasmer Module means we cannot use it.
+            // Failing to build, serialize, or deserialize the wasmer Module means we cannot use it.
             | Self::ModuleBuild(_)
+            | Self::ModuleSerialize(_)
+            | Self::ModuleDeserialize(_)
             // This is ambiguous so best to treat as potentially corrupt.
             | Self::CallError(_)
-            // We have no cache so cannot cache.
-            | Self::UninitializedSerializedModuleCache
              => true,
             // (De)serialization simply means some input/output data was
             // unrecognisable somehow, it doesn't corrupt the guest memory.

crates/host/Cargo.toml

@@ -6,6 +6,11 @@ version = "0.0.97"
 authors = ["thedavidmeister", "[email protected]"]
 edition = "2021"
 
+[lib]
+name = "holochain_wasmer_host"
+crate-type = ["cdylib", "rlib"]
+path = "src/lib.rs"
+
 [dependencies]
 wasmer = { version = "5.0.2", default-features = false }
 wasmer-middlewares = { version = "5.0.2", optional = true }
@@ -20,10 +25,8 @@ bytes = "1"
 hex = "0.4"
 thiserror = "2"
 
-[lib]
-name = "holochain_wasmer_host"
-crate-type = ["cdylib", "rlib"]
-path = "src/lib.rs"
+[dev-dependencies]
+tempfile = "3.14.0"
 
 [features]
 default = ["error_as_host", "wasmer_sys_dev"]