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fix(jupyter): fix panics for overslow subtraction (#26371)

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I don't have a reliable reproduction for it, but it makes it
painful to use the Jupyter kernel with semi-frequent random panics.

The completions don't always work correctly anyway, so I think
it's better to just not panic here for the time being.

Fixes https://github.com/denoland/deno/issues/26340
This commit is contained in:
Bartek Iwańczuk 2024-10-17 23:44:14 +01:00 committed by GitHub
parent 50724d014a
commit 02e5a7a012
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1 changed files with 12 additions and 2 deletions
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14
cli/tools/jupyter/server.rs
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@ -329,7 +329,12 @@ impl JupyterServer {
})
.collect();
(candidates, cursor_pos - prop_name.len())
if prop_name.len() > cursor_pos {
// TODO(bartlomieju): most likely not correct, but better than panicking because of sub with overflow
(candidates, cursor_pos)
} else {
(candidates, cursor_pos - prop_name.len())
}
} else {
// combine results of declarations and globalThis properties
let mut candidates = get_expression_property_names(
@ -349,7 +354,12 @@ impl JupyterServer {
candidates.sort();
candidates.dedup(); // make sure to sort first
(candidates, cursor_pos - expr.len())
if expr.len() > cursor_pos {
// TODO(bartlomieju): most likely not correct, but better than panicking because of sub with overflow
(candidates, cursor_pos)
} else {
(candidates, cursor_pos - expr.len())
}
};
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