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239 lines
5.9 KiB
C++
239 lines
5.9 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -verify %s
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void clang_analyzer_warnIfReached();
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// Systematic tests for [[clang::suppress]] interaction with lambdas.
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// Placeholder type for triggering instantiations.
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struct Type{};
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// ============================================================================
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// Group A: Lambda in suppressed statement block
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// ============================================================================
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void lambda_in_suppressed_block() {
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[[clang::suppress]] {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam();
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}
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}
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void lambda_in_unsuppressed_block() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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lam();
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}
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// ============================================================================
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// Group B: Lambda in suppressed class method
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// ============================================================================
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struct [[clang::suppress]] B_SuppressedClass {
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void method_with_lambda() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam();
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}
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};
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struct B_UnsuppressedClass {
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void method_with_lambda() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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lam();
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}
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};
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void test_B() {
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B_SuppressedClass().method_with_lambda();
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B_UnsuppressedClass().method_with_lambda();
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}
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// ============================================================================
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// Group C: Nested lambdas
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// ============================================================================
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void nested_lambda_suppressed() {
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[[clang::suppress]] {
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auto outer = []() {
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auto inner = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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return inner();
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};
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return outer(); // no-warning
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}
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}
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void nested_lambda_unsuppressed() {
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auto outer = []() {
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auto inner = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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inner();
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};
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outer();
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}
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// ============================================================================
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// Group D: Lambda with captures
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// ============================================================================
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int lambda_with_ref_capture_suppressed() {
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int *x = 0;
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[[clang::suppress]] {
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auto lam = [&x]() {
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return *x;
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};
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return lam(); // no-warning
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}
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}
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int lambda_with_ref_capture_unsuppressed() {
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int *x = 0;
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auto lam = [&x]() {
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return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}}
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};
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return lam();
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}
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int lambda_capture_by_value_suppressed() {
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int *x = 0;
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[[clang::suppress]] {
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auto lam = [x]() {
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return *x;
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};
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return lam(); // no-warning
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}
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}
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// ============================================================================
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// Group E: Lambda in suppressed namespace
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// ============================================================================
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namespace [[clang::suppress]] SuppressedNS {
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void func_with_lambda() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam();
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}
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} // namespace SuppressedNS
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// ============================================================================
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// Group F: Suppressed lambda, unsuppressed enclosing
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// ============================================================================
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void selective_suppression_unsup() {
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auto unsuppressed_lam = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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unsuppressed_lam();
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}
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void selective_suppression_sup() {
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[[clang::suppress]] auto suppressed_lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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suppressed_lam();
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}
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// ============================================================================
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// Group G: Lambda in template function
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// ============================================================================
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template <typename T>
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[[clang::suppress]] void tmpl_func_with_lambda(T) {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam();
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}
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template <typename T>
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void tmpl_func_with_lambda_unsuppressed(T) {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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lam();
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}
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void test_G() {
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tmpl_func_with_lambda(Type{});
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tmpl_func_with_lambda_unsuppressed(Type{});
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}
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// ============================================================================
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// Group H: Lambda in suppressed class template
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// ============================================================================
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template <typename T>
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struct [[clang::suppress]] H_SuppressedTmpl {
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void method() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam();
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}
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};
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template <typename T>
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struct H_UnsuppressedTmpl {
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void method() {
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auto lam = []() {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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lam();
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}
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};
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void test_H() {
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H_SuppressedTmpl<Type>().method();
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H_UnsuppressedTmpl<Type>().method();
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}
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// ============================================================================
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// Group I: Immediately-invoked lambda expression
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// ============================================================================
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int iile_suppressed() {
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[[clang::suppress]] {
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return []() {
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int *x = 0;
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return *x;
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}(); // no-warning
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}
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}
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int iile_unsuppressed() {
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return []() {
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int *x = 0;
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return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}}
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}();
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}
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// ============================================================================
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// Group J: Generic lambda (C++14)
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// ============================================================================
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void generic_lambda_suppressed() {
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[[clang::suppress]] {
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auto lam = [](auto) {
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clang_analyzer_warnIfReached(); // no-warning
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};
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lam(Type{});
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}
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}
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void generic_lambda_unsuppressed() {
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auto lam = [](auto) {
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clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
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};
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lam(Type{});
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}
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