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Fix an issue found with UBSAN where we call walk() with a nullptr for… #19014

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Merged
merged 1 commit into from
Aug 29, 2018
Merged

Fix an issue found with UBSAN where we call walk() with a nullptr for… #19014

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5 changes: 4 additions & 1 deletion lib/Sema/TypeCheckCaptures.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
Expand Down Expand Up @@ -707,6 +707,9 @@ void TypeChecker::computeCaptures(AnyFunctionRef AFR) {
if (AFR.getCaptureInfo().hasBeenComputed())
return;

if (!AFR.getBody())
return;

SmallVector<CapturedValue, 4> Captures;
SourceLoc GenericParamCaptureLoc;
SourceLoc DynamicSelfCaptureLoc;
Expand Down