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Fix underflow bug in rewrite_call

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Fixes https://github.com/nrc/rustfmt/issues/148.
Now properly propagates the rewrite failure instead of panicking. Added regression test from servo code. This example will be properly rewritten when https://github.com/nrc/rustfmt/issues/17 is addressed.
This commit is contained in:
Marcus Klaas 2015-07-22 23:39:37 +02:00
parent c10c732425
commit d13fc2289a
2 changed files with 15 additions and 1 deletions
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2
src/expr.rs
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@ -132,7 +132,7 @@ fn rewrite_call(context: &RewriteContext,
}
// 2 is for parens.
let remaining_width = width - callee_str.len() - 2;
let remaining_width = try_opt!(width.checked_sub(callee_str.len() + 2));
let offset = callee_str.len() + 1 + offset;
let items = itemize_list(context.codemap,