Possible short-circuit miscompile for while loop guard

[burg]

In the code linked below, the LHS of an && expression is used as an array bounds guard for the RHS.

This seems to be miscompiled, such that assigning each subexpression to a local inside the loop works fine, but segfaults occur when putting the whole thing as the while condition.

servo/servo@b0536d7

[nikomatsakis]

Have you tried to minimize this into a standalone function?

[burg]

No. I've already spent ~1/2 day bisecting this bug in the last week, and don't have time

On Oct 22, 2012, at 16:41 , Niko Matsakis wrote:

Have you tried to minimize this into a standalone function?

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[msullivan]

I'm not really sure what to do with this bug. The comment about the bug is still in servo (in src/components/main/layout/util.rs), but the code has changed so that it doesn't look like I could just switch back to the old version... Played around a bit trying to trigger it with small cases, but didn't find anything.

[thestinger]

Closing due to the lack of a reproducible test case.