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(merge: 4066c8e c9f9bc2)
Rollup merge of #42017 - nikomatsakis:issue-41677, r=arielb1
authorMark Simulacrum <mark.simulacrum@gmail.com>
Tue, 16 May 2017 23:31:50 +0000 (17:31 -0600)
committerGitHub <noreply@github.com>
Tue, 16 May 2017 23:31:50 +0000 (17:31 -0600)
commit52abafa464178a513f017876e13b7789adf39402
treead46b228388d58f985f35c5ac0c5a60de1a0153atree | snapshot
parent4066c8ec718d8338c2fd6e00cb63e03d3544bcd1commit | diff
parentc9f9bc27804e9ff7f87481f3eb5edf167936a3bdcommit | diff
Rollup merge of #42017 - nikomatsakis:issue-41677, r=arielb1

avoid cycles in mir-dump, take 2

This fixes #41697, for real this time, but I'm not sure how best to add a regression test. I was considering maybe adding some flag so that the MIR dumping doesn't actually get written to files (e.g., overloading the directory flag so you can specify nil or something).

cc @dwrensha @oli-obk
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