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auto merge of #15958 : hirschenberger/rust/borrock-stats-div-by-zero, r=alexcrichton

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`rustc -Z borrowck-stats` displays ugly `-NaN%` in the stats

```
paths requiring guarantees: 0
paths requiring loans     : 0 (-NaN%)
paths requiring imm loans : 0 (-NaN%)
stable paths              : 0 (-NaN%)
```
This commit is contained in:
bors 2014-07-25 15:41:08 +00:00
commit d30776ec24
1 changed files with 2 additions and 2 deletions
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4
src/librustc/middle/borrowck/mod.rs
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@ -98,9 +98,9 @@ pub fn check_crate(tcx: &ty::ctxt,
}
fn make_stat(bccx: &BorrowckCtxt, stat: uint) -> String {
let stat_f = stat as f64;
let total = bccx.stats.guaranteed_paths.get() as f64;
format!("{} ({:.0f}%)", stat , stat_f * 100.0 / total)
let perc = if total == 0.0 { 0.0 } else { stat as f64 * 100.0 / total };
format!("{} ({:.0f}%)", stat, perc)
}
}