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Clang crashes on incorrect code with build compiler returned: 254 #107843

Open Strke opened 1 week ago

Strke commented 1 week ago

Reproducer: https://gcc.godbolt.org/z/dj3765YPn (assertions trunk）

#include <iostream>
class Base;
class Derived;
class DerivedClass2;
class Base
{
public:
    Base()  = default;
    Base(const Base&) {}
    virtual ~Base()  = default;
    virtual bool operator==(const Derived&) const noexcept {}
    virtual bool operator<(const Base&) const noexcept {}

protected:
    DerivedClass2 obj;
};
class Derived : public Base
{
public:
    bool operator==(const Derived&) const = default;
    bool operator<(const Base&) const = default;
};
class DerivedClass2 : public Derived
{
public:
    bool operator==(const Derived&) const = default;
    bool operator<(const Base&) const = default;
};
class DerivedClass : public Derived
{
public:
    bool operator==(const Derived&) const = default;
    bool operator<(const Base&) const = default;
protected:
    Base obj(const Derived&);
};
DerivedClass2 obj{};
int main()
{
    std::cout << "ok";
}
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.  Program arguments: /opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -dumpdir /app/output.s- -disable-free -clear-ast-before-backend -main-file-name example.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -fno-verbose-asm -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debug-info-kind=constructor -dwarf-version=4 -debugger-tuning=gdb -fdebug-compilation-dir=/app -fcoverage-compilation-dir=/app -resource-dir /opt/compiler-explorer/clang-assertions-trunk-20240909/lib/clang/20 -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0 -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0/x86_64-linux-gnu -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0/backward -internal-isystem /opt/compiler-explorer/clang-assertions-trunk-20240909/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include --std=c++20 -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/example-338b0c.o -x c++ <source>
1.  <source>:34:2: current parser token ';'
2.  <source>:29:1: parsing struct/union/class body 'DerivedClass2'
  #0 0x0000000003b258d8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x3b258d8)
  #1 0x0000000003b2301c SignalHandler(int) Signals.cpp:0:0
  #2 0x0000725aa1a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
  #3 0x0000000001abfe06 _ZN4llvm7hashing6detail23hash_combine_range_implIKjEENSt9enable_ifIXsrNS1_16is_hashable_dataIT_EE5valueENS_9hash_codeEE4typeEPS6_SB_ (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x1abfe06)
  #4 0x0000000003a78db1 llvm::FoldingSetBase::FindNodeOrInsertPos(llvm::FoldingSetNodeID const&, void*&, llvm::FoldingSetBase::FoldingSetInfo const&) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x3a78db1)
  #5 0x000000000793da12 clang::DeclarationNameTable::getCXXDestructorName(clang::CanQual<clang::Type>) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x793da12)
  #6 0x0000000007954f58 clang::CXXRecordDecl::getDestructor() const (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x7954f58)
  #7 0x0000000007957659 clang::CXXRecordDecl::hasConstexprDestructor() const (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x7957659)
  #8 0x0000000006a02d28 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
  #9 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
 #10 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
............
#234 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#235 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#236 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#237 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#238 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#239 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#240 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#241 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#242 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#243 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#244 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#245 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#246 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#247 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#248 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#249 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#250 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#251 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#252 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#253 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#254 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
#255 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0
clang++: error: unable to execute command: Segmentation fault (core dumped)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Execution build compiler returned: 254
llvmbot commented 1 week ago

@llvm/issue-subscribers-clang-frontend

Author: Linrz (Strke)

Reproducer: https://gcc.godbolt.org/z/dj3765YPn (assertions trunk） ``` #include <iostream> class Base; class Derived; class DerivedClass2; class Base { public: Base() = default; Base(const Base&) {} virtual ~Base() = default; virtual bool operator==(const Derived&) const noexcept {} virtual bool operator<(const Base&) const noexcept {} protected: DerivedClass2 obj; }; class Derived : public Base { public: bool operator==(const Derived&) const = default; bool operator<(const Base&) const = default; }; class DerivedClass2 : public Derived { public: bool operator==(const Derived&) const = default; bool operator<(const Base&) const = default; }; class DerivedClass : public Derived { public: bool operator==(const Derived&) const = default; bool operator<(const Base&) const = default; protected: Base obj(const Derived&); }; DerivedClass2 obj{}; int main() { std::cout << "ok"; } ``` ``` PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -dumpdir /app/output.s- -disable-free -clear-ast-before-backend -main-file-name example.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -fno-verbose-asm -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debug-info-kind=constructor -dwarf-version=4 -debugger-tuning=gdb -fdebug-compilation-dir=/app -fcoverage-compilation-dir=/app -resource-dir /opt/compiler-explorer/clang-assertions-trunk-20240909/lib/clang/20 -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0 -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0/x86_64-linux-gnu -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../include/c++/15.0.0/backward -internal-isystem /opt/compiler-explorer/clang-assertions-trunk-20240909/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.0/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include --std=c++20 -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/example-338b0c.o -x c++ <source> 1. <source>:34:2: current parser token ';' 2. <source>:29:1: parsing struct/union/class body 'DerivedClass2' #0 0x0000000003b258d8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x3b258d8) #1 0x0000000003b2301c SignalHandler(int) Signals.cpp:0:0 #2 0x0000725aa1a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #3 0x0000000001abfe06 _ZN4llvm7hashing6detail23hash_combine_range_implIKjEENSt9enable_ifIXsrNS1_16is_hashable_dataIT_EE5valueENS_9hash_codeEE4typeEPS6_SB_ (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x1abfe06) #4 0x0000000003a78db1 llvm::FoldingSetBase::FindNodeOrInsertPos(llvm::FoldingSetNodeID const&, void*&, llvm::FoldingSetBase::FoldingSetInfo const&) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x3a78db1) #5 0x000000000793da12 clang::DeclarationNameTable::getCXXDestructorName(clang::CanQual<clang::Type>) (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x793da12) #6 0x0000000007954f58 clang::CXXRecordDecl::getDestructor() const (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x7954f58) #7 0x0000000007957659 clang::CXXRecordDecl::hasConstexprDestructor() const (/opt/compiler-explorer/clang-assertions-trunk-20240909/bin/clang-20+0x7957659) #8 0x0000000006a02d28 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #9 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #10 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 ............ #234 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #235 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #236 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #237 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #238 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #239 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #240 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #241 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #242 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #243 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #244 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #245 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #246 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #247 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #248 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #249 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #250 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #251 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #252 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #253 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #254 0x0000000006a02df9 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 #255 0x0000000006a02e64 bool clang::Sema::CheckCompletedCXXClass(clang::Scope*, clang::CXXRecordDecl*)::'lambda1'(clang::CXXMethodDecl*)::operator()(clang::CXXMethodDecl*) const::'lambda'(clang::QualType, auto&&)::operator()<'lambda'(clang::QualType, auto&&)&>(clang::QualType, auto&&) const (.isra.0) SemaDeclCXX.cpp:0:0 clang++: error: unable to execute command: Segmentation fault (core dumped) clang++: error: clang frontend command failed due to signal (use -v to see invocation) Execution build compiler returned: 254 ```
shafik commented 1 week ago

This looks like a regression since clang-18 does not SIGSEGV on this: https://gcc.godbolt.org/z/Mjs1bnoe6

Regressions are usually good catches.