Keep stack traces in withError
#3573
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Kover Report
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kyay10
reviewed
Jan 26, 2025
| callsInPlace(transform, AT_MOST_ONCE) | ||
| } | ||
| // recover({ return block(this) }) { raise(transform(it)) } | ||
| val raise = DefaultRaise(false) |
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Doesn't this mean that innerException would always have no stack trace?
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Why would that be the case? As I understand the inner stack trace comes from the point where the RaiseCancellationException is first thrown.
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Well, the inner exception is always going to be a NoTrace because it's created by a DefaultRaise(false). Otherwise, we would be creating a stack trace every time, which would defeat our optimizations.
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This is an attempt to fix #3351. The idea is to "inline" the definition of
withError, and within it carefully copy stack traces. Since the "inner exception" already contains the stack trace including anywithError, we just need to copy it, not change it in any way.