Re: [creduce-bugs] tgz with nine separate creduce_bug_00x dirs

[Yang Chen <chenyang@cs.utah.edu>]

Hi Jack,

Thanks for reporting the issue! Sorry for my belated reply.

Seems all the failures were caused by a clang issue, which could be 
reproduced by:

$ cat x.cc
namespace NS  {
template<typename T> struct S {
  struct S1;
  struct S2;
  struct S3 : public S1, public S2 {};
};
}
$ clang -v
clang version 9.0.1
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ clang x.cc
clang-9: 
/backup/work/compilers/compiler-source/llvm-9.0.1.src/tools/clang/include/clang/AST/DeclCXX.h:671: 
struct DefinitionData &clang::CXXRecordDecl::data() const: Assertion `DD 
&& "queried property of class with no definition"' failed.
Stack dump:

Actually, seems the latest dev version also has the same issue. I 
submitted a bug to Clang:

https://bugs.llvm.org/show_bug.cgi?id=48307

- Yang

On 7/29/20 10:51 AM, Jack wrote:
> Please let me know if you want these sent separately - there are nine 
> included.
>
> For background information, I am trying to track down a ICE (internal 
> compiler error) in gcc (specifically x86_64-pc-linux-gnu-g++) when 
> compiling boost-1.73.0.  gcc has been built with debugging info, but 
> the file I am reducing is part of boost.  The current run has been 
> going for over 48 hours and has so far reduced from 92792 lines/ 
> 3267829 bytes to 12389 lines/585124 bytes.  A minor issue (but 
> probably not for creduce itself) is that the bug seems 
> non-deterministic, so a single example may not fail every time.  An 
> earlier run (about 6 hours) came down to a single (not actually 
> syntactically valid) line, and the current run is after applying a 
> patch to gcc to fix that one. Additional info, in case it matters, is 
> that the interestingness test is just grepping for "internal compiler 
> error" in the gcc output.
>
> I am not subscribed to either list, but will be watching the archives 
> in case I need to subscribe to participate in any discussion.
>
> Thank.