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AST: Fix assertions crash with try expressions (main branch cherry-pick) #34131

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Merged
merged 1 commit into from
Oct 1, 2020
Merged

AST: Fix assertions crash with try expressions (main branch cherry-pick) #34131

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4 changes: 2 additions & 2 deletions lib/AST/Expr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1943,7 +1943,7 @@ Expr *AutoClosureExpr::getUnwrappedCurryThunkExpr() const {
body = body->getSemanticsProvidingExpr();

if (auto *openExistential = dyn_cast<OpenExistentialExpr>(body)) {
body = openExistential->getSubExpr();
body = openExistential->getSubExpr()->getSemanticsProvidingExpr();
}

if (auto *outerCall = dyn_cast<ApplyExpr>(body)) {
Expand All @@ -1963,7 +1963,7 @@ Expr *AutoClosureExpr::getUnwrappedCurryThunkExpr() const {
innerBody = innerBody->getSemanticsProvidingExpr();

if (auto *openExistential = dyn_cast<OpenExistentialExpr>(innerBody)) {
innerBody = openExistential->getSubExpr();
innerBody = openExistential->getSubExpr()->getSemanticsProvidingExpr();
if (auto *ICE = dyn_cast<ImplicitConversionExpr>(innerBody))
innerBody = ICE->getSyntacticSubExpr();
}
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12 changes: 12 additions & 0 deletions validation-test/compiler_crashers_2_fixed/sr12994.swift
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -index-store-path %t/idx -o %t/file.o -typecheck -primary-file %s -verify

protocol MyProto {
func compile() throws
}

func compile(x: MyProto) throws {
try x.compile
// expected-error@-1 {{expression resolves to an unused function}}
// expected-warning@-2 {{no calls to throwing functions occur within 'try' expression}}
}