1 files changed, 29 insertions, 24 deletions
diff --git a/src/js_errors.rs b/src/js_errors.rs
index f42d9cb51..90c9f2007 100644
--- a/src/js_errors.rs
+++ b/src/js_errors.rs
@@ -206,36 +206,41 @@ pub fn apply_source_map(
   }
 }
 
-fn parse_map_string(
-  script_name: &str,
-  getter: &dyn SourceMapGetter,
-) -> Option<SourceMap> {
+// The bundle does not get built for 'cargo check', so we don't embed the
+// bundle source map.
+#[cfg(feature = "check-only")]
+fn builtin_source_map(script_name: &str) -> Option<Vec<u8>> {
+  None
+}
+
+#[cfg(not(feature = "check-only"))]
+fn builtin_source_map(script_name: &str) -> Option<Vec<u8>> {
   match script_name {
-    // The bundle does not get built for 'cargo check', so we don't embed the
-    // bundle source map.
-    #[cfg(not(feature = "check-only"))]
-    "gen/bundle/main.js" => {
-      let s =
-        include_str!(concat!(env!("GN_OUT_DIR"), "/gen/bundle/main.js.map"));
-      SourceMap::from_json(s)
-    }
-    #[cfg(not(feature = "check-only"))]
-    "gen/bundle/compiler.js" => {
-      let s = include_str!(concat!(
+    "gen/bundle/main.js" => Some(
+      include_bytes!(concat!(env!("GN_OUT_DIR"), "/gen/bundle/main.js.map"))
+        .to_vec(),
+    ),
+    "gen/bundle/compiler.js" => Some(
+      include_bytes!(concat!(
         env!("GN_OUT_DIR"),
         "/gen/bundle/compiler.js.map"
-      ));
-      SourceMap::from_json(s)
-    }
-    _ => match getter.get_source_map(script_name) {
-      None => None,
-      Some(raw_source_map) => {
-        SourceMap::from_json(str::from_utf8(&raw_source_map).unwrap())
-      }
-    },
+      )).to_vec(),
+    ),
+    _ => None,
   }
 }
 
+fn parse_map_string(
+  script_name: &str,
+  getter: &dyn SourceMapGetter,
+) -> Option<SourceMap> {
+  builtin_source_map(script_name)
+    .or_else(|| getter.get_source_map(script_name))
+    .and_then(|raw_source_map| {
+      SourceMap::from_json(str::from_utf8(&raw_source_map).unwrap())
+    })
+}
+
 fn get_mappings<'a>(
   script_name: &str,
   mappings_map: &'a mut CachedMaps,