From: bors <bors@rust-lang.org>
Date: Tue, 8 Nov 2016 14:47:48 +0000 (-0800)
Subject: Auto merge of #3259 - alexcrichton:more-ro, r=brson
X-Git-Tag: archive/raspbian/0.35.0-2+rpi1~3^2^2^2^2^2^2^2~22^2~13^2~9
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Auto merge of #3259 - alexcrichton:more-ro, r=brson

Open crate files readonly first

This allows Cargo to work with read-only `CARGO_HOME` directories where the
cache was prepared ahead of time.

Closes #3256
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0c155a47d61b37425e9c28f76fddf7bc2cb7df08