C/C++: extractor exit code 3

[hello123leo]

clang++ version: 17.0.6
codeql version: 2.26.2

repro.cpp

struct S {
  operator unsigned long long() const;
  S(int) = delete;                       // deleted converting constructor
};

bool operator==(unsigned long long lhs, const S &rhs)
    __attribute__((enable_if(lhs == 0, "literal is safe")));

bool trigger(S s) {
  return s == 0;
}

command:

codeql database create db \
    --language=cpp \
    --source-root=. \
    --command='clang++ -std=c++17 -fsyntax-only repro.cpp'

build-tracer.log:

[E 08:16:24 3866661] CODEQL_EXTRACTOR_CPP_TRAP_CACHING is not set
[E 08:16:24 3866661] CODEQL_EXTRACTOR_CPP_OPTION_TRAP_CACHE_WRITE is not set
[E 08:16:24 3866661] CODEQL_EXTRACTOR_CPP_OPTION_TRAP_CACHE_DIR is not set
[E 08:16:24 3866661] Initialising TRAP cache at path: e4/eb18/18d3fc78486465bd318c72f9c45b
[E 08:16:24 3866661] Not using TRAP cache
[E 08:16:24 3866661] TRAP cache miss
[E 08:16:24 3866661] Starting compilation TRAP /tmp/codeql-s-repro/db/trap/cpp/compilations/39/25630124_0.trap.zst
[E 08:16:24 3866661] Archiving /tmp/codeql-s-repro/db/src/tmp/codeql-s-repro/repro.cpp
"repro.cpp", line 10: error: function "S::S(int)" (declared at line 3) cannot be referenced -- it is a deleted function
    return s == 0;
                 ^

[E 08:16:24 3866661] Warning[extractor-c++]: In construct_text_message: "repro.cpp", line 10: error: function "S::S(int)" (declared at line 3) cannot be referenced -- it is a deleted function
    return s == 0;
                 ^


"repro.cpp", line 10: error: function "S::S(int)" (declared at line 3) cannot be referenced -- it is a deleted function
    return s == 0;
                 ^

[E 08:16:24 3866661] Warning[extractor-c++]: In construct_text_message: "repro.cpp", line 10: error: function "S::S(int)" (declared at line 3) cannot be referenced -- it is a deleted function
    return s == 0;
                 ^


[E 08:16:24 3866661] Creating trap tarball /tmp/codeql-s-repro/db/trap/cpp/tarballs/tmp/codeql-s-repro/repro.cpp.65bef835_0.trap.tar.zst
[E 08:16:24 3866661] Emitting trap files for repro.cpp
[E 08:16:24 3866661] Opening existencedb in /tmp/codeql-s-repro/db/working/existencedb/db
[E 08:16:24 3866661] Warning[extractor-c++]: In canonicalise_path: fs::canonical failed on repro.o (No such file or directory)
[E 08:16:24 3866661] Wrote 2 files to /tmp/codeql-s-repro/db/trap/cpp/tarballs/tmp/codeql-s-repro/repro.cpp.65bef835_0.trap.tar.zst
2 errors detected in the compilation of "repro.cpp".
[E 08:16:24 3866661] Finished compilation TRAP /tmp/codeql-s-repro/db/trap/cpp/compilations/39/25630124_0.trap.zst
[E 08:16:24 3866661] Marking C compilation as happened.
[E 08:16:24 3866661] Setting tag c-compilation-happened
[E 08:16:24 3866661] Starting from CODEQL_TRACER_DB_ID 00000000003B0021_0000000000000003
[E 08:16:24 3866661] Locking DB /tmp/codeql-s-repro/db/working/tags.db
[E 08:16:24 3866661] Locked DB /tmp/codeql-s-repro/db/working/tags.db
[E 08:16:24 3866661] Set tag for 00000000003B0021_0000000000000003
[E 08:16:24 3866661] Set tag for 00000000003B0021_0000000000000002
[E 08:16:24 3866661] Set tag for root
[E 08:16:24 3866661] Unlocking DB
[E 08:16:24 3866661] Unlocked DB
[E 08:16:24 3866661] Warning[extractor-c++]: In main: Extractor exiting with code 3
[T 08:16:24 3866657] Extractor /tmp/codeql-2.26.2/codeql/cpp/tools/linux64/extractor terminated with exit code 3.

[jketema]

Hi @hello123leo,

What exactly is your question?

[hello123leo]

Hi @jketema,
Sorry for missing the question. I'm currently troubleshooting a CodeQL database creation issue for a large project, where I noticed some extractors exiting with code 3 in build-tracer.log. The code snippet above is a simplified minimal reproduction. I'm not sure if this behavior is expected, so I wanted to ask about it.

[jketema]

Thanks. It looks like our frontend is not compatible with with clang here. I'll report this to our frontend provider. Thanks for the small reproducer.

[jketema]

I've received a patch. I cannot yet tell which CodeQL version this will land in. I'll update this issue once I know.

[jketema]

This is expected to be fixed in CodeQL 2.27.1.