| ... | ... | @@ -194,7 +194,9 @@ Let us have a closer look at the stack: |
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function. That the stack is so "clean" means that we have no lazy
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evaluation going on, which is a result of compiling
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with optimisations above (`-O`). Perhaps unintuitively, simple
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optimisations often improve stack trace clarity.
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optimisations often improve stack trace clarity (the following flags,
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all part of `-O`, seem particularly helpful:
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`-fno-ignore-interface-pragmas -fno-omit-interface-pragmas -fenable-rewrite-rules`).
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- On the other hand, `main` does not appear in the stack any more. In
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fact, where it should be we only see `show` and `putStrLn`
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