[clang] 02347fc - Reapply "[Sema] Fix crash on invalid code with parenthesized aggregate initialization" (#76272)
Ilya Biryukov via cfe-commits
cfe-commits at lists.llvm.org
Tue Jan 2 07:13:02 PST 2024
Author: Ilya Biryukov
Date: 2024-01-02T16:00:55+01:00
New Revision: 02347fc7191ff4d073f439dde6523add3f5496de
URL: https://github.com/llvm/llvm-project/commit/02347fc7191ff4d073f439dde6523add3f5496de
DIFF: https://github.com/llvm/llvm-project/commit/02347fc7191ff4d073f439dde6523add3f5496de.diff
LOG: Reapply "[Sema] Fix crash on invalid code with parenthesized aggregate initialization" (#76272)
With updates the libc++ tests.
This reverts commit 2205d2334f3c859ad9f6c65ed950bfb3bb6f7cbe and relands
86dc6e15f22610bbb53eb4efda0a178ecefc933a and
7ab16fb5207fe187ab999f882069bd632d2e68e5.
Original commit was reverted because of failing libc++ tests, see #76232 for
the discussion.
The errors in the tests are spurious in the first place (coming from initialization
of invalid classes), so update the tests to match new behavior that does
not show those errors.
Added:
clang/test/SemaCXX/crash-GH76228.cpp
Modified:
clang/lib/Sema/SemaInit.cpp
clang/test/SemaCXX/paren-list-agg-init.cpp
libcxx/test/libcxx/utilities/expected/expected.expected/transform_error.mandates.verify.cpp
libcxx/test/libcxx/utilities/expected/expected.void/transform_error.mandates.verify.cpp
Removed:
################################################################################
diff --git a/clang/lib/Sema/SemaInit.cpp b/clang/lib/Sema/SemaInit.cpp
index 61d244f3bb9798..cc9db5ded1149a 100644
--- a/clang/lib/Sema/SemaInit.cpp
+++ b/clang/lib/Sema/SemaInit.cpp
@@ -5512,6 +5512,14 @@ static void TryOrBuildParenListInitialization(
} else if (auto *RT = Entity.getType()->getAs<RecordType>()) {
bool IsUnion = RT->isUnionType();
const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
+ if (RD->isInvalidDecl()) {
+ // Exit early to avoid confusion when processing members.
+ // We do the same for braced list initialization in
+ // `CheckStructUnionTypes`.
+ Sequence.SetFailed(
+ clang::InitializationSequence::FK_ParenthesizedListInitFailed);
+ return;
+ }
if (!IsUnion) {
for (const CXXBaseSpecifier &Base : RD->bases()) {
diff --git a/clang/test/SemaCXX/crash-GH76228.cpp b/clang/test/SemaCXX/crash-GH76228.cpp
new file mode 100644
index 00000000000000..33a9395823127e
--- /dev/null
+++ b/clang/test/SemaCXX/crash-GH76228.cpp
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -std=c++20 -verify %s
+// Check we don't crash on incomplete members and bases when handling parenthesized initialization.
+class incomplete; // expected-note at -0 3 {{forward declaration of 'incomplete'}}
+struct foo {
+ int a;
+ incomplete b;
+ // expected-error at -1 {{incomplete type}}
+};
+foo a1(0);
+
+struct one_int {
+ int a;
+};
+struct bar : one_int, incomplete {};
+// expected-error at -1 {{incomplete type}}
+bar a2(0);
+
+incomplete a3[3](1,2,3);
+// expected-error at -1 {{incomplete type}}
+
+struct qux : foo {
+};
+qux a4(0);
+
+struct fred {
+ foo a[3];
+};
+fred a5(0);
diff --git a/clang/test/SemaCXX/paren-list-agg-init.cpp b/clang/test/SemaCXX/paren-list-agg-init.cpp
index f60b20e0d46568..c1964a5a9eb005 100644
--- a/clang/test/SemaCXX/paren-list-agg-init.cpp
+++ b/clang/test/SemaCXX/paren-list-agg-init.cpp
@@ -289,7 +289,7 @@ int test() {
// used to crash
S a(0, 1);
S b(0);
- S c(0, 0, 1); // beforecxx20-warning {{aggregate initialization of type 'S' from a parenthesized list of values is a C++20 extension}}
+ S c(0, 0, 1);
S d {0, 1};
S e {0};
diff --git a/libcxx/test/libcxx/utilities/expected/expected.expected/transform_error.mandates.verify.cpp b/libcxx/test/libcxx/utilities/expected/expected.expected/transform_error.mandates.verify.cpp
index 965e82a7b40346..3260a8cbc7f8e6 100644
--- a/libcxx/test/libcxx/utilities/expected/expected.expected/transform_error.mandates.verify.cpp
+++ b/libcxx/test/libcxx/utilities/expected/expected.expected/transform_error.mandates.verify.cpp
@@ -46,11 +46,9 @@ void test() {
{
std::expected<int, int> e;
e.transform_error(return_unexpected<int&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
// expected-error-re@*:* {{static assertion failed {{.*}}[expected.object.general] A program that instantiates the definition of template expected<T, E> for {{.*}} is ill-formed.}}
e.transform_error(return_no_object<int&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
// expected-error-re@*:* {{static assertion failed {{.*}}[expected.object.general] A program that instantiates the definition of template expected<T, E> for {{.*}} is ill-formed.}}
}
@@ -58,27 +56,21 @@ void test() {
{
const std::expected<int, int> e;
e.transform_error(return_unexpected<const int &>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
e.transform_error(return_no_object<const int &>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
// Test && overload
{
std::expected<int, int> e;
std::move(e).transform_error(return_unexpected<int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
std::move(e).transform_error(return_no_object<int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
// Test const&& overload
{
const std::expected<int, int> e;
std::move(e).transform_error(return_unexpected<const int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
std::move(e).transform_error(return_no_object<const int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* 2 {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
}
// clang-format on
diff --git a/libcxx/test/libcxx/utilities/expected/expected.void/transform_error.mandates.verify.cpp b/libcxx/test/libcxx/utilities/expected/expected.void/transform_error.mandates.verify.cpp
index 09aa1332e98000..21dc2476879186 100644
--- a/libcxx/test/libcxx/utilities/expected/expected.void/transform_error.mandates.verify.cpp
+++ b/libcxx/test/libcxx/utilities/expected/expected.void/transform_error.mandates.verify.cpp
@@ -46,11 +46,9 @@ void test() {
{
std::expected<void, int> e;
e.transform_error(return_unexpected<int&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
// expected-error-re@*:* {{static assertion failed {{.*}}A program that instantiates expected<T, E> with a E that is not a valid argument for unexpected<E> is ill-formed}}
e.transform_error(return_no_object<int&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
// expected-error-re@*:* {{static assertion failed {{.*}}A program that instantiates expected<T, E> with a E that is not a valid argument for unexpected<E> is ill-formed}}
}
@@ -58,27 +56,21 @@ void test() {
{
const std::expected<void, int> e;
e.transform_error(return_unexpected<const int &>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
e.transform_error(return_no_object<const int &>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
// Test && overload
{
std::expected<void, int> e;
std::move(e).transform_error(return_unexpected<int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
std::move(e).transform_error(return_no_object<int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
// Test const&& overload
{
const std::expected<void, int> e;
std::move(e).transform_error(return_unexpected<const int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
std::move(e).transform_error(return_no_object<const int&&>); // expected-error-re@*:* {{static assertion failed {{.*}}The result of {{.*}} must be a valid template argument for unexpected}}
- // expected-error-re@*:* {{{{(excess elements in struct initializer|no matching constructor for initialization of)}}{{.*}}}}
}
}
// clang-format on
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