zig compile error

test.zig

//! parser for nodelang written in zig 

pub const Tok = enum {
  colon,
  other, // need at least two here to trigger it
};

const Token = struct {
  tok: Tok,
  str: []const u8,

  pub fn new(tok: Tok, str: []const u8) Token {
    return Token{.tok=tok, .str=str};
  }
};

fn parseMany(comptime tokOrNodeTypes: [2]Tok) !?u32 {
  // inline for seems to be necessary, I tried manually inlining
  inline for (tokOrNodeTypes) |tokType| {
    // manually inlining Token.new prevents the compiler segfault from appearing
    const tok = try @as(anyerror!Token, Token.new(Tok.colon, ":"));
    // being in the else clause seems to be necessary
    if (tok.tok != tokType) {} else {
      while (true) {
        // returning instead of breaking seems to be necessary
        return null;
      }
    }
  }
  return 0;
}

pub fn main() !void {
  _ = try parseMany(.{Tok.colon, Tok.colon});
}

fails to compile on: compiler: 0.10.0-dev.290+3901b6fb0