v6.x backport: promise: better stack traces for --trace-warnings #10378
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Backport of #9525 to v6.x
Had to resolve a minor conflict in
lib/internal/process/promises.jsand remove the deprecation message from the test output.Given that there was some worrying about breakage in #9525, this can wait for a bit if that makes people feel more comfortable. Generally the reactions so far seem to be positive, though.
CI: https://ci.nodejs.org/job/node-test-commit/6764/
Give better stack traces for
PromiseRejectionHandledWarningand
UnhandledPromiseRejectionWarnings.For
PromiseRejectionHandledWarning, when it is likely that thereis an
Errorobject generated, it is created early to provide aproper stack trace.
For
UnhandledPromiseRejectionWarning, the stack trace of theunderlying error object is used, if possible.
Fixes: #9523
PR-URL: #9525