On Sunday, 28 August 2022 at 22:46:17 UTC, Gavin Ray wrote:
I've put the code, stripped to a minimal example here:
- https://ldc.godbolt.org/z/fzsx3Tnnn
You can see that the single write + read version of the code
works just fine:
```
pageData[0..4] = [1, 2, 3, 4]
readData[0..4] = [1, 2, 3, 4]
```
Where here, `pageData` is the data to be written to a file, and
`readData` is the result of trying to read the freshly written
file data.
But if the same code is placed inside of a `for` loop, suddenly
no writes occur:
```d
pageData[0..4] = [0, 0, 0, 0]
readData[0..4] = [0, 0, 0, 0]
pageData[0..4] = [0, 0, 0, 1]
readData[0..4] = [0, 0, 0, 0]
pageData[0..4] = [0, 0, 0, 2]
readData[0..4] = [0, 0, 0, 0]
pageData[0..4] = [0, 0, 0, 3]
readData[0..4] = [0, 0, 0, 0]
pageData[0..4] = [0, 0, 0, 4]
readData[0..4] = [0, 0, 0, 0]
// ...
```
Does anyone know what is happening here? It's really puzzling.
You probably need to flush the output.
