From 834ecdc59a084d0ccafa17ccc0e4801115935295 Mon Sep 17 00:00:00 2001
From: Jon Coppeard <jcoppeard@mozilla.com>
Date: Sat, 22 Aug 2020 10:13:37 +0000
Subject: Issue #618 - Handle errors for inline module scripts and ensure we
 update the module map after fetch errors.

---
 dom/script/ScriptLoader.cpp | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

(limited to 'dom/script/ScriptLoader.cpp')

diff --git a/dom/script/ScriptLoader.cpp b/dom/script/ScriptLoader.cpp
index c94966169..1ee50ccfc 100644
--- a/dom/script/ScriptLoader.cpp
+++ b/dom/script/ScriptLoader.cpp
@@ -486,8 +486,6 @@ ScriptLoader::ProcessFetchedModuleSource(ModuleLoadRequest* aRequest)
   nsresult rv = CreateModuleScript(aRequest);
   MOZ_ASSERT(NS_FAILED(rv) == !aRequest->mModuleScript);
 
-  SetModuleFetchFinishedAndResumeWaitingRequests(aRequest, rv);
-
   free(aRequest->mScriptTextBuf);
   aRequest->mScriptTextBuf = nullptr;
   aRequest->mScriptTextLength = 0;
@@ -497,6 +495,10 @@ ScriptLoader::ProcessFetchedModuleSource(ModuleLoadRequest* aRequest)
     return rv;
   }
 
+  if (!aRequest->mIsInline) {
+    SetModuleFetchFinishedAndResumeWaitingRequests(aRequest, rv);
+  }
+
   if (!aRequest->mModuleScript->HasParseError()) {
     StartFetchingModuleDependencies(aRequest);
   }
@@ -1457,20 +1459,19 @@ ScriptLoader::ProcessScriptElement(nsIScriptElement *aElement)
   if (request->IsModuleRequest()) {
     ModuleLoadRequest* modReq = request->AsModuleRequest();
     modReq->mBaseURL = mDocument->GetDocBaseURI();
-    rv = CreateModuleScript(modReq);
-    MOZ_ASSERT(NS_FAILED(rv) == !modReq->mModuleScript);
-    if (NS_FAILED(rv)) {
-      modReq->LoadFailed();
-      return false;
-    }
+
     if (aElement->GetScriptAsync()) {
-      mLoadingAsyncRequests.AppendElement(request);
+      modReq->mIsAsync = true;
+      mLoadingAsyncRequests.AppendElement(modReq);
     } else {
-      AddDeferRequest(request);
+      AddDeferRequest(modReq);
     }
-    if (!modReq->mModuleScript->HasParseError()) {
-      StartFetchingModuleDependencies(modReq);
+
+    nsresult rv = ProcessFetchedModuleSource(modReq);
+    if (NS_FAILED(rv)) {
+      HandleLoadError(modReq, rv);
     }
+
     return false;
   }
   request->mProgress = ScriptLoadRequest::Progress::Ready;
@@ -2324,6 +2325,11 @@ ScriptLoader::HandleLoadError(ScriptLoadRequest *aRequest, nsresult aResult) {
     mDocument->AddBlockedTrackingNode(cont);
   }
 
+  if (aRequest->IsModuleRequest() && !aRequest->mIsInline) {
+    auto request = aRequest->AsModuleRequest();
+    SetModuleFetchFinishedAndResumeWaitingRequests(request, aResult);
+  }
+
   if (aRequest->mIsDefer) {
     MOZ_ASSERT_IF(aRequest->IsModuleRequest(),
                   aRequest->AsModuleRequest()->IsTopLevel());
-- 
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