Fix WASM EXIT message duplication causing GENERAL_FAILURE exit code#1578
Merged
kotlarmilos merged 1 commit intodotnet:mainfrom Mar 30, 2026
Merged
Conversation
The JSON message processor concatenated payload and arguments fields (payload + " " + arguments), but for simple console.log() calls both contain the same text. This produced duplicated output like 'WASM EXIT 0 WASM EXIT 0', and int.Parse on the substring threw FormatException, crashing the message processor with exit code 71. Use payload alone (fall back to arguments only when payload is null), and switch to int.TryParse for robustness. Fixes: dotnet/runtime#124544 (comment) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
pavelsavara
approved these changes
Mar 27, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Problem
The JSON message processor in
WasmTestMessagesProcessor.ProcessMessageconcatenatespayloadandargumentsfields:For simple
console.log()calls, bothpayloadandarguments[0]contain the same text. This produces duplicated output:This manifests on runtime
release/8.0-staging(PR #124544) where the older JavaScript console bridge sends WebSocket messages as JSON with bothpayloadandargumentsfields.cc @pavelsavara