Timeouts with TAP reporter result in `AggregateError`
Author: ComandeerCreated Jun 21, 2026Updated Jun 21, 2026
Labelsneeds triage
When using the TAP reporter, timeouts in tests result in the following error:
file:///usr/src/app/node_modules/emittery/index.js:785
throw new AggregateError(errors, 'One or more listeners threw an error');
^
AggregateError: One or more listeners threw an error
at RunStatus.emit (file:///usr/src/app/node_modules/emittery/index.js:785:10) {
[errors]: [
TypeError: Cannot set properties of undefined (setting 'stack')
at dumpError (file:///usr/src/app/node_modules/ava/lib/reporters/tap.js:48:22)
at TapReporter.writeTest (file:///usr/src/app/node_modules/ava/lib/reporters/tap.js:105:21)
at TapReporter.writeTimeout (file:///usr/src/app/node_modules/ava/lib/reporters/tap.js:151:10)
at TapReporter.consumeStateChange (file:///usr/src/app/node_modules/ava/lib/reporters/tap.js:217:10)
at file:///usr/src/app/node_modules/ava/lib/reporters/tap.js:72:55
at file:///usr/src/app/node_modules/emittery/index.js:769:13
at Array.map (<anonymous>)
at RunStatus.emit (file:///usr/src/app/node_modules/emittery/index.js:767:23)
]
}This error prevents the reporter from outputting the standard summary of the test run.
Minimal reproduction: https://github.com/Comandeer/bugs-reports/tree/ava-timeout
The issue seems to be connected with setting the originalError.stack property, however the originalError is undefined – as writeTimeout() passes down a native Error object that lacks this property.
Source: avajs/ava