fix: handle unhandled promise rejections in whitespace-async.js - #3245
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fix: handle unhandled promise rejections in whitespace-async.js#3245Nuiverseqiu wants to merge 3 commits into
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Add .catch() handlers to promise chains in whitespace-async.js files to prevent unhandled rejections and provide clear error messages.
…e errors gracefully:
chikataoluis-dev
approved these changes
Mar 25, 2026
chikataoluis-dev
approved these changes
Mar 25, 2026
anandfresh
approved these changes
May 30, 2026
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Add .catch() handlers to promise chains in whitespace-async.js files to prevent unhandled rejections and provide clear error messages.
Summary
Fix unhandled promise rejections in whitespace-async.js scripts that occur when ESLint 9 loads the config or when CLIEngine is unavailable.
Problem
The onlyErrorOnRules(...).then(...) promise chain lacked a .catch() handler. If the promise rejects, it causes an unhandled rejection, potentially crashing the process. Additionally, child process errors or non-JSON output could cause JSON.parse(stdout) to fail with unclear errors during config loading.
Solution
Added .catch() handlers to log errors to stderr and exit with code 1, ensuring graceful failure and better error visibility.
Files Changed
Testing
Verified scripts run without unhandled rejections in both packages.