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Merge pull request #230 from jdm/underflow

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Avoid an integer underflow panic. Fixes #229.
This commit is contained in:
Marcus Klaas de Vries 2015-08-31 07:43:31 +02:00
commit 2bf4d74832
1 changed files with 1 additions and 1 deletions
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src/expr.rs
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@ -1026,7 +1026,7 @@ fn rewrite_field(context: &RewriteContext,
-> Option<String> {
let name = &field.ident.node.to_string();
let overhead = name.len() + 2;
let expr = field.expr.rewrite(context, width - overhead, offset + overhead);
let expr = field.expr.rewrite(context, try_opt!(width.checked_sub(overhead)), offset + overhead);
expr.map(|s| format!("{}: {}", name, s))
}