[Bug] Compilation Error in Blaze Using MinGW on Windows

[MadhavDhatrak]

Description

When compiling Blaze with MinGW 14.2.0 on Windows, the build fails with an ambiguous constructor error in the sourcemeta_core_jsonpointer component.

Error Location

The error occurs at

• File: deps/blaze/vendor/core/src/core/jsonpointer/parser.h
• Where: result.emplace_back(internal::parse_index(string, column))

Root Cause

1.The parse_index() function returns a long unsigned int
2.The code attempts to construct a GenericToken with this value
3.The compiler cannot decide between multiple constructors:

• GenericToken(const int value) - jsonpointer_token.h
• GenericToken(const Index value) where Index is long long unsigned int
• GenericToken(const JSON::Char value)

Reproduction

Using MinGW to build with

cmake -Bbuild -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release
cmake --build build --config Release

[jviotti]

I'm trying to build the corresponding library on CI using MSYS2, but so far no issues: sourcemeta/core#1725.

What happens if you build the project without specifying a generator, and letting it pick the default in the system?

cmake -Bbuild -DCMAKE_BUILD_TYPE=Release

[jviotti]

Can you also paste the output of the configure step? I want to check what compiler and compiler version you are running on.

[jviotti]

Though interestingly enough, seems like I found a couple of MSYS2-specific JSON parsing issues in the Core library 🤔 Interesting...

[MadhavDhatrak]

Can you also paste the output of the configure step? I want to check what compiler and compiler version you are running on.

look at this screenshot. There's a problem with jsonpointer.h, and you can also see it's failing when it comes across jsonpointer

[jviotti]

@MadhavDhatrak Can you still paste the output of the configure CMake step? Beyond just looking at the error, I want to reproduce on CI to confirm the fix.