Update faerie, remove usage of failure (#591)

This commit removes the usage of the `failure` crate and finishes up the
final pieces of the migration to `std::error::Error` and `anyhow`. The
`faerie` crate was updated to pull in its migration from `failure` to
`anyhow` as well.

crates/jit/Cargo.toml

@@ -19,12 +19,12 @@ wasmtime-environ = { path = "../environ", default-features = false }
 wasmtime-runtime = { path = "../runtime", default-features = false }
 wasmtime-debug = { path = "../debug", default-features = false }
 region = "2.0.0"
-failure = { version = "0.1.3", default-features = false }
 thiserror = "1.0.4"
 target-lexicon = { version = "0.9.0", default-features = false }
 hashbrown = { version = "0.6.0", optional = true }
 wasmparser = { version = "0.39.2", default-features = false }
 more-asserts = "0.2.1"
+anyhow = "1.0"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 winapi = { version = "0.3.7", features = ["winnt", "impl-default"] }

crates/jit/src/instantiate.rs

@@ -44,8 +44,8 @@ pub enum SetupError {
     Instantiate(#[from] InstantiationError),
 
     /// Debug information generation error occured.
-    #[error("Debug information error: {0}")]
-    DebugInfo(failure::Error),
+    #[error("Debug information error")]
+    DebugInfo(#[from] anyhow::Error),
 }
 
 /// This is similar to `CompiledModule`, but references the data initializers