[LLVMbugs] [Bug 20594] New: Assertion failure writing .ast files when class data member initializers contain Block expressions

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20594

            Bug ID: 20594
           Summary: Assertion failure writing .ast files when class data
                    member initializers contain Block expressions
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: thonermann at coverity.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The following test cases compile to object code successfully, but fail an
assertion when a .ast file is emitted.  The assertion failure has been
reproduced with Clang 3.4 and Clang trunk (r214770).

$ cat t.cpp
struct S {
    static void(^bp)();
};
void(^S::bp)() = ^{};

$ cat t-cxx11.cpp
struct S {
    void(^bp)() = ^{};
};

$ clang --version
clang version 3.6.0 (trunk 214770)
Target: x86_64-unknown-linux-gnu
Thread model: posix

$ clang -fblocks -c t.cpp
<no error>

$ clang -fblocks -c t.cpp -emit-ast
clang: .../lib/AST/DeclBase.cpp:701: bool
clang::Decl::AccessDeclContextSanity() const: Assertion `Access != AS_none &&
"Access specifier is AS_none inside a record decl"' failed.
...

$ clang -fblocks -std=c++11 -c t-cxx11.cpp
<no error>

$ clang -fblocks -std=c++11 -c t-cxx11.cpp -emit-ast
clang: .../lib/AST/DeclBase.cpp:701: bool
clang::Decl::AccessDeclContextSanity() const: Assertion `Access != AS_none &&
"Access specifier is AS_none inside a record decl"' failed.
...

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