From ef843b9e5a1d4d112b604f8e98e081f1ed607341 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Sat, 1 Feb 2020 02:46:53 -0800
Subject: [PATCH] Add a `Debug` implementation for `wsmtime::Config`

Handy to have in some situations!
---
 crates/api/src/runtime.rs | 15 +++++++++++++++
 crates/jit/src/context.rs |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/crates/api/src/runtime.rs b/crates/api/src/runtime.rs
index 3475261ce9..a930cac462 100644
--- a/crates/api/src/runtime.rs
+++ b/crates/api/src/runtime.rs
@@ -1,5 +1,6 @@
 use anyhow::Result;
 use std::cell::RefCell;
+use std::fmt;
 use std::rc::Rc;
 use std::sync::Arc;
 use wasmtime_environ::settings::{self, Configurable};
@@ -223,6 +224,20 @@ impl Default for Config {
     }
 }
 
+impl fmt::Debug for Config {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("Config")
+            .field("debug_info", &self.debug_info)
+            .field("strategy", &self.strategy)
+            .field("features", &self.features)
+            .field(
+                "flags",
+                &settings::Flags::new(self.flags.clone()).to_string(),
+            )
+            .finish()
+    }
+}
+
 /// Possible Compilation strategies for a wasm module.
 ///
 /// This is used as an argument to the [`Config::strategy`] method.
diff --git a/crates/jit/src/context.rs b/crates/jit/src/context.rs
index 42dbae8d52..30922d4967 100644
--- a/crates/jit/src/context.rs
+++ b/crates/jit/src/context.rs
@@ -26,7 +26,7 @@ pub enum ContextError {
 }
 
 /// The collection of features configurable during compilation
-#[derive(Clone, Default)]
+#[derive(Clone, Default, Debug)]
 pub struct Features {
     /// marks whether the proposed thread feature is enabled or disabled
     pub threads: bool,