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Fixed last command crash

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When the last command has an input value larger than the data its
operating on it would crash.  Added a check to ensure there are enough
elements to take.
This commit is contained in:
Jonathan Rothberg
2019-09-29 20:20:18 -07:00
parent 348d75112f
commit 093b9c1c5b
1 changed files with 7 additions and 4 deletions
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5
src/commands/last.rs
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@ -38,11 +38,14 @@ fn last(
) -> Result<OutputStream, ShellError> { ) -> Result<OutputStream, ShellError> {
let stream = async_stream! { let stream = async_stream! {
let v: Vec<_> = context.input.into_vec().await; let v: Vec<_> = context.input.into_vec().await;
let k = v.len() - (*amount as usize); let count = (*amount as usize);
if count < v.len() {
let k = v.len() - count;
for x in v[k..].iter() { for x in v[k..].iter() {
let y: Tagged<Value> = x.clone(); let y: Tagged<Value> = x.clone();
yield ReturnSuccess::value(y) yield ReturnSuccess::value(y)
} }
}
}; };
Ok(stream.to_output_stream()) Ok(stream.to_output_stream())
} }