initialize ICU

This makes functions like new Intl.DateTimeFormat() not crash.

src/browser/browser.zig

@@ -940,3 +940,14 @@ fn timestamp() u32 {
     const ts = std.posix.clock_gettime(std.posix.CLOCK.MONOTONIC) catch unreachable;
     return @intCast(ts.sec);
 }
+
+const testing = @import("../testing.zig");
+test "Browser" {
+    var runner = try testing.jsRunner(testing.tracking_allocator, .{});
+    defer runner.deinit();
+
+    // this will crash if ICU isn't properly configured / ininitialized
+    try runner.testCases(&.{
+        .{ "new Intl.DateTimeFormat()", "[object Intl.DateTimeFormat]" },
+    }, .{});
+}

src/main.zig

@@ -65,7 +65,7 @@ pub fn main() !void {
         else => {},
     }
 
-    const platform = Platform.init();
+    const platform = try Platform.init();
     defer platform.deinit();
 
     var app = try App.init(alloc, .{
@@ -423,7 +423,7 @@ var test_wg: std.Thread.WaitGroup = .{};
 test "tests:beforeAll" {
     try parser.init();
     test_wg.startMany(3);
-    _ = Platform.init();
+    _ = try Platform.init();
 
     {
         const address = try std.net.Address.parseIp("127.0.0.1", 9582);

src/main_wpt.zig

@@ -118,7 +118,7 @@ pub fn main() !void {
     }
 
     // initialize VM JS lib.
-    const platform = Platform.init();
+    const platform = try Platform.init();
     defer platform.deinit();
 
     // prepare libraries to load on each test case.

src/runtime/js.zig

@@ -34,7 +34,10 @@ const SCOPE_ARENA_RETAIN = 1024 * 64;
 pub const Platform = struct {
     inner: v8.Platform,
 
-    pub fn init() Platform {
+    pub fn init() !Platform {
+        if (v8.initV8ICU() == false) {
+            return error.FailedToInitializeICU;
+        }
         const platform = v8.Platform.initDefault(0, true);
         v8.initV8Platform(platform);
         v8.initV8();