Possibly-related memory corruption issue

[Abscissa]

I guessing this is probably a dmd issue, and filed it as 19825. But I'm posting here too, just in case std_data_json is part of the problem, or anyone here could help find the exact compiler problem:

dub.sdl:

name "test"
dependency "std_data_json" version="==0.18.3"

main.d:

import std.stdio;
import stdx.data.json;

enum rawJson = `
{
	"rootPackage": "vibe-d",
	"targets": [
		{
			"rootConfiguration": "vibe-core"
		}
	]
}
`;

void yap(T...)(lazy T args)
{
	writeln(args);
}

struct Foo
{
	int a;
	string name;
}

Foo makeFoo()
{
	Foo foo;

	auto root = rawJson.toJSONValue;
	foo.name = root["rootPackage"].toString.idup;
	writeln(foo.name);
	yap(root["targets"][0]["rootConfiguration"]);

	return foo;
}

void main(string[] args)
{
	auto foo = makeFoo();
	writeln(foo.name); // Garbled output, then an exception
}

result:

$ dub -q
vibe-d
vibe-core
[...garbled data here...]uncaught exception
std.exception.ErrnoException@/home/nick/.dvm/compilers/dmd-2.085.0/linux/bin/../../src/phobos/std/stdio.d(2882): Enforcement failed (Bad address)
----------------
/home/nick/.dvm/compilers/dmd-2.085.0/linux/bin/../../src/phobos/std/exception.d:515 @safe void std.exception.bailOut!(std.exception.ErrnoException).bailOut(immutable(char)[], ulong, scope const(char)[]) [0xf11be9a1]
/home/nick/.dvm/compilers/dmd-2.085.0/linux/bin/../../src/phobos/std/exception.d:436 @safe int std.exception.enforce!(std.exception.ErrnoException).enforce!(int).enforce(int, lazy const(char)[], immutable(char)[], ulong) [0xf11be921]
/home/nick/.dvm/compilers/dmd-2.085.0/linux/bin/../../src/phobos/std/stdio.d:2882 @safe void std.stdio.File.LockingTextWriter.put!(immutable(char)[]).put(scope immutable(char)[]) [0xf11be81f]
/home/nick/.dvm/compilers/dmd-2.085.0/linux/bin/../../src/phobos/std/stdio.d:3806 @safe void std.stdio.writeln!(immutable(char)[]).writeln(immutable(char)[]) [0xf11be747]
src/main.d:41 _Dmain [0xf11a69d8]
Program exited with code -6

[s-ludwig]

It's not clear from the code, but it might be caused by s-ludwig/taggedalgebraic#29 - did you build with the latest 0.11.4 release?

[Abscissa]

Hmm, it appears to be pulling in 0.10.13, not 0.11.4. Apparently the latest release of std_data_json (0.18.3) has its taggedalgebraic dependency set to ~>0.10.1. I tried manually editing dub.selections.json to 0.11.4, and I'm still getting the same issue, but I don't know whether dub might be just simply ignoring the 0.11.4 setting since it conflicts with the dependency constraints.

[FeepingCreature]

Cannot reproduce here. Your dub.sdl is not enough to produce a working binary with dub 1.15.0/dmd 2.087.1. When I filled in the missing values, I did not get a crash. Is this still an issue?