fix: forward termination error

Fixes: #1140

lib/fetch/index.js

@@ -78,7 +78,7 @@ async function fetch (...args) {
       if (this.terminated) {
         return
       }
-      this.terminated = { aborted }
+      this.terminated = { aborted, reason }
 
       this.connection?.destroy(reason)
 
@@ -1249,11 +1249,15 @@ async function httpNetworkOrCacheFetch (
     // 3. If the ongoing fetch is terminated, then:
     if (context.terminated) {
       // 1. Let aborted be the termination’s aborted flag.
+      const aborted = context.terminated.aborted
+
       // 2. If aborted is set, then return an aborted network error.
+      if (aborted) {
+        return makeNetworkError(new AbortError())
+      }
+
       // 3. Return a network error.
-      return makeNetworkError(
-        context.terminated.aborted ? new AbortError() : null
-      )
+      return makeNetworkError(context.terminated.reason)
     }
 
     // 4. Prompt the end user as appropriate in request’s window and store
@@ -1283,10 +1287,12 @@ async function httpNetworkOrCacheFetch (
       const aborted = context.terminated.aborted
 
       // 2. If aborted is set, then return an aborted network error.
-      const reason = aborted ? new AbortError() : new Error('terminated')
+      if (aborted) {
+        return makeNetworkError(new AbortError())
+      }
 
       // 3. Return a network error.
-      return makeNetworkError(reason)
+      return makeNetworkError(context.terminated.reason)
     }
 
     // 2. Set response to the result of running HTTP-network-or-cache
@@ -1476,10 +1482,12 @@ function httpNetworkFetch (
       this.connection.destroy()
 
       // 3. If aborted is set, then return an aborted network error.
-      const reason = aborted ? new AbortError() : new Error('terminated')
+      if (aborted) {
+        return resolve(makeNetworkError(new AbortError()))
+      }
 
       // 4. Return a network error.
-      resolve(makeNetworkError(reason))
+      return resolve(makeNetworkError(this.terminated.reason))
     }
 
     // 10. Let pullAlgorithm be an action that resumes the ongoing fetch