fix(io): handle missing source in stdin #534
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Currently `io::stdin()` when used with `lines().fuse()` from `futures`, will panic on the first poll. This adds a test for this case, as well as a potential fix.
dignifiedquire
commented
Feb 23, 2022
| let res = match source.result() { | ||
| Some(res) => res, | ||
| None => { | ||
| return Poll::Pending; |
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I don't know if this is the correct fix, but it does fix both the test case and when using stdin in my program to read from it
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it seems the missing stdin on CI is failing the tests, any suggestions on how to adjust such that it actually tests the right thing? |
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The fix looks good, but your new unit test is failing in CI. I'll try to find some time to reproduce locally to see what's going on. This new test relies on timing, though, and generally, that's best avoided. |
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it doesn’t actually rely on timing, just the fact that nothing gets written to stdin and that it is available |
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Currently
io::stdin()when used withlines().fuse()fromfutures, will panic on the first poll. This adds a test for thiscase, as well as a potential fix.