fix(v3/windows): don't kill the process when WebResourceRequested can't read the request - #6006
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fix(v3/windows): don't kill the process when WebResourceRequested can't read the request#6006midagedev wants to merge 2 commits into
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Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review. WalkthroughThe ChangesWebView2 request recovery
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The change keeps a single failed WebView request from terminating the application, but the nil-request path may produce an unhelpful error log, so it is mergeable with explicit owner awareness or a follow-up to improve diagnostics. Suggested reviewers: Poem
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In `@v3/internal/webview2/pkg/edge/chromium.go`:
- Around line 726-731: Update the WebResourceRequested error handling around the
req nil check to distinguish a non-nil error from a nil request with no error.
Keep the existing error details for failures, but log an explicit message
identifying the nil-request recovery case before returning 0.
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v3/UNRELEASED_CHANGELOG.mdv3/internal/webview2/pkg/edge/chromium.go
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…'t read the request GetRequest can fail at runtime, and can also return S_OK without setting the out pointer under load (wailsapp#1103's crash trace shows the resulting Release on a nil request). Both cases now drop that one request and log, instead of log.Fatal — which exits without even reaching the application's error callback. Same class as the merged wailsapp#5658/wailsapp#5597 runtime-COM-error recoveries; this was the last remaining process-kill in the handler set.
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* desktop: ship wailsapp/wails#6006 from a fork until it merges wails' webview_window_windows.go registers a "*" WebResourceRequested filter for asset serving, so on Windows every request the WebView makes runs through edge.Chromium's handler — and that handler called log.Fatal(err) when args.GetRequest() failed. One transient COM failure on one request killed gadak, skipping deferred cleanup, and log.Fatal does not even reach the error callback wails' own SetErrorCallback configures. There is a second mode in the same branch: the COM call can return S_OK without setting the out pointer, which makes `defer req.Release()` a nil-pointer release (wails#1103's field crash trace). The fix is ten lines and has been open upstream since 2026-08-19, unblocked — its one review comment was addressed and resolved the same day. It is waiting on a maintainer. gadak does not have to (user decision 2026-08-30). So: github.com/midagedev/wails, branch gadak/v3.0.0-beta.12 — the upstream tag with those two commits cherry-picked, nothing else — tagged v3.0.0-beta.12-gadak.1, and pinned here by a replace whose comment says which PR, why it is reachable in gadak, and to delete it when it merges. A replace with no expiry is how a fork becomes permanent by accident. Two measured facts are in docs/runbooks/upstream-pr.md, because this will happen again: the fork's go.mod module line stays as upstream's (Go resolves the package path from the original module path, so no import rewriting — the folklore answer would break every internal import), and the branch must be TAGGED or `go mod tidy` derives a pseudo-version from the nearest tag reachable in the fork, which read `v3.0.0-beta.9.0.2026…` for a branch cut from beta.12. Verified: go mod tidy, go build ./... (darwin), GOOS=windows go build ./..., go vet, gofmt — and the patched source is the one in the module cache. The linux cross-build fails from macOS for the same GTK/cgo reason it does on stock beta.12 (checked against the unmodified go.mod); the Linux desktop job is why this is a PR. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * desktop: teach the wails pin gate about a fork replace TestWailsModuleVersionMatchesGoMod compared debug.ReadBuildInfo()'s wails version against go.mod's require line. With the #6006 fork replace those legitimately differ: wailsModuleVersion() prefers Replace.Version by design — it reports what actually linked — while the require line keeps naming the upstream base the fork is cut from. So the gate went red on the commit that added the replace. Narrowed rather than relaxed. The gate now reads the replace line too, and asserts the fork version is prefixed by the required upstream version, so v3.0.0-beta.12-gadak.1 passes while a fork silently cut from a different base fails with the reason spelled out. FAIL-first, both halves measured: the original failure is PR #78's "Desktop tests" job, and pointing the require line at beta.11 with the replace untouched reproduces the new branch. TestPinnedWailsVersionIsNamed is untouched — main.go, README.md and build-windows.ps1 still have to name the upstream base, which is the version whose behaviour those comments describe. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
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Description
Chromium.WebResourceRequestedcallslog.Fatal(err)whenargs.GetRequest()fails. Once a"*"filter is registered (webview_window_windows.godoes this for asset serving), every request the WebView makes flows through this handler — so one transient COM failure on one request kills the whole application, skipping deferred cleanup, andlog.Fataldoes not even reach the error callback configured viaSetErrorCallback.There is also a second, historically reported failure mode: the COM call can return
S_OKwithout setting the out pointer, soGetRequestreturns(nil, nil)(the wrapper only checks the HRESULT). #1103 reported exactly this under load in the same binding lineage — its crash trace isICoreWebView2WebResourceRequest.Release(0x0), which is whatdefer req.Release()does with a nil request here.Change
Both cases now drop that one request and log, instead of exiting: the WebView continues default handling for the dropped request, which is recoverable; killing the process is not.
Same class as the merged #5658 ("recover from transient runtime COM errors instead of exiting") and #5597 — after those, this
log.Fatalis the last remaining process-kill in this handler set, and the log format matches theirs. Only the error is logged, no request data.Notes for review:
<nil>— that is precisely the [v2, windows] Random panics during processRequest #1103 mode (S_OK with an unset out pointer), so the log line still identifies it.PermissionRequestedabove still routes two runtime failures througherrorCallback; that path at least respectsSetErrorCallback, so it is left out of this single-purpose fix. Happy to follow up on it if wanted.Type of change
How Has This Been Tested?
GOOS=windows go build ./internal/webview2/... ./pkg/application/andgo veton the touched file (clean).GetRequestrequires fault injection the binding does not expose. The defect evidence is [v2, windows] Random panics during processRequest #1103's field crash trace plus the wrapper's HRESULT-only check; the fix is behavior-preserving for every successful request.Summary by CodeRabbit