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Commit caacd1d6 authored by rwbarton's avatar rwbarton Committed by Ben Gamari
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Don't eagerly blackhole single-entry thunks (#10414) 

In a parallel program they can actually be entered more than once,
leading to deadlock.

Reviewers: austin, simonmar

Subscribers: michaelt, thomie, bgamari

Differential Revision: https://phabricator.haskell.org/D1040

GHC Trac Issues: #10414

Conflicts:
	testsuite/tests/codeGen/should_run/all.T
parent 07a1f32e
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