The program output is different whether an Error is thrown from main or from the unittest block:

void foo(string s)
in (s != "hello") {
}

unittest {
  foo("hello");  // No stack backtrace
}

void main() {
  foo("hello");  // Yes stack backtrace
}

Ali

On Sunday, 4 September 2022 at 14:14:55 UTC, Ali Çehreli wrote:
> The program output is different whether an Error is thrown from main or from the unittest block:

Because the default test runner catches the Error, and doesn't print the stack trace:

https://github.com/dlang/dmd/blob/25799d3841ea87246c56532f6f91d9a1e34d8d8f/druntime/src/core/runtime.d#L599-L620

There's even a comment about it:

    // TODO: omit stack trace only if assert was thrown
    // directly by the unittest.

On 9/4/22 09:35, Paul Backus wrote:

>      // TODO: omit stack trace only if assert was thrown
>      // directly by the unittest.

Thank you but I mean... :) I can understand removing a backtrace from the eyes of an end user but the consumer of a unittest output is a developer, no?

Ali