fix most test compilation errors

src/aws.zig

@@ -1412,14 +1412,14 @@ fn typeForField(comptime T: type, comptime field_name: []const u8) !type {
 
 test "custom serialization for map objects" {
     const allocator = std.testing.allocator;
-    var buffer = std.ArrayList(u8).init(allocator);
+    var buffer = std.Io.Writer.Allocating.init(allocator);
     defer buffer.deinit();
     var tags = try std.ArrayList(@typeInfo(try typeForField(services.lambda.tag_resource.Request, "tags")).pointer.child).initCapacity(allocator, 2);
-    defer tags.deinit();
+    defer tags.deinit(allocator);
     tags.appendAssumeCapacity(.{ .key = "Foo", .value = "Bar" });
     tags.appendAssumeCapacity(.{ .key = "Baz", .value = "Qux" });
     const req = services.lambda.TagResourceRequest{ .resource = "hello", .tags = tags.items };
-    try std.json.stringify(req, .{ .whitespace = .indent_4 }, buffer.writer());
+    try buffer.writer.print("{f}", .{std.json.fmt(req, .{ .whitespace = .indent_4 })});
 
     const parsed_body = try std.json.parseFromSlice(struct {
         Resource: []const u8,
@@ -1427,7 +1427,7 @@ test "custom serialization for map objects" {
             Foo: []const u8,
             Baz: []const u8,
         },
-    }, testing.allocator, buffer.items, .{});
+    }, testing.allocator, buffer.written(), .{});
     defer parsed_body.deinit();
 
     try testing.expectEqualStrings("hello", parsed_body.value.Resource);
@@ -1439,7 +1439,7 @@ test "proper serialization for kms" {
     // Github issue #8
     // https://github.com/elerch/aws-sdk-for-zig/issues/8
     const allocator = std.testing.allocator;
-    var buffer = std.ArrayList(u8).init(allocator);
+    var buffer = std.Io.Writer.Allocating.init(allocator);
     defer buffer.deinit();
     const req = services.kms.encrypt.Request{
         .encryption_algorithm = "SYMMETRIC_DEFAULT",
@@ -1451,7 +1451,7 @@ test "proper serialization for kms" {
         .dry_run = false,
         .grant_tokens = &[_][]const u8{},
     };
-    try std.json.stringify(req, .{ .whitespace = .indent_4 }, buffer.writer());
+    try buffer.writer.print("{f}", .{std.json.fmt(req, .{ .whitespace = .indent_4 })});
 
     {
         const parsed_body = try std.json.parseFromSlice(struct {
@@ -1461,7 +1461,7 @@ test "proper serialization for kms" {
             GrantTokens: [][]const u8,
             EncryptionAlgorithm: []const u8,
             DryRun: bool,
-        }, testing.allocator, buffer.items, .{});
+        }, testing.allocator, buffer.written(), .{});
         defer parsed_body.deinit();
 
         try testing.expectEqualStrings("42", parsed_body.value.KeyId);
@@ -1471,7 +1471,7 @@ test "proper serialization for kms" {
         try testing.expectEqual(false, parsed_body.value.DryRun);
     }
 
-    var buffer_null = std.ArrayList(u8).init(allocator);
+    var buffer_null = std.Io.Writer.Allocating.init(allocator);
     defer buffer_null.deinit();
     const req_null = services.kms.encrypt.Request{
         .encryption_algorithm = "SYMMETRIC_DEFAULT",
@@ -1483,7 +1483,7 @@ test "proper serialization for kms" {
         .grant_tokens = &[_][]const u8{},
     };
 
-    try std.json.stringify(req_null, .{ .whitespace = .indent_4 }, buffer_null.writer());
+    try buffer_null.writer.print("{f}", .{std.json.fmt(req_null, .{ .whitespace = .indent_4 })});
 
     {
         const parsed_body = try std.json.parseFromSlice(struct {
@@ -1493,7 +1493,7 @@ test "proper serialization for kms" {
             GrantTokens: [][]const u8,
             EncryptionAlgorithm: []const u8,
             DryRun: bool,
-        }, testing.allocator, buffer_null.items, .{});
+        }, testing.allocator, buffer_null.written(), .{});
         defer parsed_body.deinit();
 
         try testing.expectEqualStrings("42", parsed_body.value.KeyId);
@@ -1541,8 +1541,8 @@ test "REST Json v1 serializes lists in queries" {
 }
 test "REST Json v1 buildpath substitutes" {
     const allocator = std.testing.allocator;
-    var al = std.ArrayList([]const u8).init(allocator);
+    var al = std.ArrayList([]const u8){};
-    defer al.deinit();
+    defer al.deinit(allocator);
     const svs = Services(.{.lambda}){};
     const request = svs.lambda.list_functions.Request{
         .max_items = 1,
@@ -1554,8 +1554,8 @@ test "REST Json v1 buildpath substitutes" {
 }
 test "REST Json v1 buildpath handles restricted characters" {
     const allocator = std.testing.allocator;
-    var al = std.ArrayList([]const u8).init(allocator);
+    var al = std.ArrayList([]const u8){};
-    defer al.deinit();
+    defer al.deinit(allocator);
     const svs = Services(.{.lambda}){};
     const request = svs.lambda.list_functions.Request{
         .marker = ":",
@@ -1571,7 +1571,7 @@ test "basic json request serialization" {
     const request = svs.dynamo_db.list_tables.Request{
         .limit = 1,
     };
-    var buffer = std.ArrayList(u8).init(allocator);
+    var buffer = std.Io.Writer.Allocating.init(allocator);
     defer buffer.deinit();
 
     // The transformer needs to allocate stuff out of band, but we
@@ -1583,13 +1583,13 @@ test "basic json request serialization" {
     //       for a boxed member with no observable difference." But we're
     //       seeing a lot of differences here between spec and reality
     //
-    try std.json.stringify(request, .{ .whitespace = .indent_4 }, buffer.writer());
+    try buffer.writer.print("{f}", .{std.json.fmt(request, .{ .whitespace = .indent_4 })});
     try std.testing.expectEqualStrings(
         \\{
         \\    "ExclusiveStartTableName": null,
         \\    "Limit": 1
         \\}
-    , buffer.items);
+    , buffer.written());
 }
 test "layer object only" {
     const TestResponse = struct {
@@ -2291,7 +2291,7 @@ test "rest_json_1_work_with_lambda: lambda tagResource (only), to excercise zig
     const options = try test_harness.start();
     const lambda = (Services(.{.lambda}){}).lambda;
     var tags = try std.ArrayList(@typeInfo(try typeForField(lambda.tag_resource.Request, "tags")).pointer.child).initCapacity(allocator, 1);
-    defer tags.deinit();
+    defer tags.deinit(allocator);
     tags.appendAssumeCapacity(.{ .key = "Foo", .value = "Bar" });
     const req = services.lambda.tag_resource.Request{ .resource = "arn:aws:lambda:us-west-2:550620852718:function:awsome-lambda-LambdaStackawsomeLambda", .tags = tags.items };
     const call = try Request(lambda.tag_resource).call(req, options);
@@ -2674,7 +2674,7 @@ test "jsonStringify: structure + enums" {
     var arena = std.heap.ArenaAllocator.init(testing.allocator);
     defer arena.deinit();
 
-    const request_json = try std.json.stringifyAlloc(std.testing.allocator, request, .{});
+    const request_json = try std.fmt.allocPrint(std.testing.allocator, "{f}", .{std.json.fmt(request, .{})});
     defer std.testing.allocator.free(request_json);
 
     const parsed = try std.json.parseFromSlice(struct {
@@ -2699,7 +2699,7 @@ test "jsonStringify: strings" {
     var arena = std.heap.ArenaAllocator.init(testing.allocator);
     defer arena.deinit();
 
-    const request_json = try std.json.stringifyAlloc(std.testing.allocator, request, .{});
+    const request_json = try std.fmt.allocPrint(std.testing.allocator, "{f}", .{std.json.fmt(request, .{})});
     defer std.testing.allocator.free(request_json);
 
     try testing.expectEqualStrings("{\"arn\":\"1234\"}", request_json);
@@ -2721,7 +2721,7 @@ test "jsonStringify" {
     var arena = std.heap.ArenaAllocator.init(testing.allocator);
     defer arena.deinit();
 
-    const request_json = try std.json.stringifyAlloc(std.testing.allocator, request, .{});
+    const request_json = try std.fmt.allocPrint(std.testing.allocator, "{f}", .{std.json.fmt(request, .{})});
     defer std.testing.allocator.free(request_json);
 
     const json_parsed = try std.json.parseFromSlice(struct {
@@ -2748,7 +2748,7 @@ test "jsonStringify nullable object" {
             },
         };
 
-        const request_json = try std.json.stringifyAlloc(std.testing.allocator, request, .{});
+        const request_json = try std.fmt.allocPrint(std.testing.allocator, "{f}", .{std.json.fmt(request, .{})});
         defer std.testing.allocator.free(request_json);
 
         const json_parsed = try std.json.parseFromSlice(struct {
@@ -2774,7 +2774,7 @@ test "jsonStringify nullable object" {
             .ciphertext_blob = "bar",
         };
 
-        const request_json = try std.json.stringifyAlloc(std.testing.allocator, request, .{});
+        const request_json = try std.fmt.allocPrint(std.testing.allocator, "{f}", .{std.json.fmt(request, .{})});
         defer std.testing.allocator.free(request_json);
 
         const json_parsed = try std.json.parseFromSlice(struct {

src/aws_signing.zig

@@ -348,10 +348,10 @@ pub fn freeSignedRequest(allocator: std.mem.Allocator, request: *base.Request, c
 
 pub const credentialsFn = *const fn ([]const u8) ?Credentials;
 
-pub fn verifyServerRequest(allocator: std.mem.Allocator, request: *std.http.Server.Request, request_body_reader: anytype, credentials_fn: credentialsFn) !bool {
+pub fn verifyServerRequest(allocator: std.mem.Allocator, request: *std.http.Server.Request, credentials_fn: credentialsFn) !bool {
     var unverified_request = try UnverifiedRequest.init(allocator, request);
     defer unverified_request.deinit();
-    return verify(allocator, unverified_request, request_body_reader, credentials_fn);
+    return verify(allocator, unverified_request, credentials_fn);
 }
 
 pub const UnverifiedRequest = struct {
@@ -359,17 +359,19 @@ pub const UnverifiedRequest = struct {
     target: []const u8,
     method: std.http.Method,
     allocator: std.mem.Allocator,
+    raw: *std.http.Server.Request,
 
     pub fn init(allocator: std.mem.Allocator, request: *std.http.Server.Request) !UnverifiedRequest {
-        var al = std.ArrayList(std.http.Header).init(allocator);
+        var al = std.ArrayList(std.http.Header){};
-        defer al.deinit();
+        defer al.deinit(allocator);
         var it = request.iterateHeaders();
-        while (it.next()) |h| try al.append(h);
+        while (it.next()) |h| try al.append(allocator, h);
         return .{
             .target = request.head.target,
             .method = request.head.method,
-            .headers = try al.toOwnedSlice(),
+            .headers = try al.toOwnedSlice(allocator),
             .allocator = allocator,
+            .raw = request,
         };
     }
 
@@ -387,7 +389,7 @@ pub const UnverifiedRequest = struct {
     }
 };
 
-pub fn verify(allocator: std.mem.Allocator, request: UnverifiedRequest, request_body_reader: anytype, credentials_fn: credentialsFn) !bool {
+pub fn verify(allocator: std.mem.Allocator, request: UnverifiedRequest, credentials_fn: credentialsFn) !bool {
     var arena = std.heap.ArenaAllocator.init(allocator);
     defer arena.deinit();
     const aa = arena.allocator();
@@ -420,7 +422,6 @@ pub fn verify(allocator: std.mem.Allocator, request: UnverifiedRequest, request_
     return verifyParsedAuthorization(
         aa,
         request,
-        request_body_reader,
         credential.?,
         signed_headers.?,
         signature.?,
@@ -431,7 +432,6 @@ pub fn verify(allocator: std.mem.Allocator, request: UnverifiedRequest, request_
 fn verifyParsedAuthorization(
     allocator: std.mem.Allocator,
     request: UnverifiedRequest,
-    request_body_reader: anytype,
     credential: []const u8,
     signed_headers: []const u8,
     signature: []const u8,
@@ -494,7 +494,8 @@ fn verifyParsedAuthorization(
         .content_type = request.getFirstHeaderValue("content-type").?,
     };
     signed_request.query = request.target[signed_request.path.len..]; // TODO: should this be +1? query here would include '?'
-    signed_request.body = try request_body_reader.readAllAlloc(allocator, std.math.maxInt(usize));
+    // TODO: This is almost certainly not what we want here long term, but will get tests working
+    signed_request.body = try request.raw.server.reader.in.allocRemaining(allocator, .unlimited);
     defer allocator.free(signed_request.body);
     signed_request = try signRequest(allocator, signed_request, config);
     defer freeSignedRequest(allocator, &signed_request, config);
@@ -1010,13 +1011,13 @@ test "canonical query" {
 test "canonical headers" {
     const allocator = std.testing.allocator;
     var headers = try std.ArrayList(std.http.Header).initCapacity(allocator, 5);
-    defer headers.deinit();
+    defer headers.deinit(allocator);
-    try headers.append(.{ .name = "Host", .value = "iam.amazonaws.com" });
+    try headers.append(allocator, .{ .name = "Host", .value = "iam.amazonaws.com" });
-    try headers.append(.{ .name = "Content-Type", .value = "application/x-www-form-urlencoded; charset=utf-8" });
+    try headers.append(allocator, .{ .name = "Content-Type", .value = "application/x-www-form-urlencoded; charset=utf-8" });
-    try headers.append(.{ .name = "User-Agent", .value = "This header should be skipped" });
+    try headers.append(allocator, .{ .name = "User-Agent", .value = "This header should be skipped" });
-    try headers.append(.{ .name = "My-header1", .value = "  a  b  c  " });
+    try headers.append(allocator, .{ .name = "My-header1", .value = "  a  b  c  " });
-    try headers.append(.{ .name = "X-Amz-Date", .value = "20150830T123600Z" });
+    try headers.append(allocator, .{ .name = "X-Amz-Date", .value = "20150830T123600Z" });
-    try headers.append(.{ .name = "My-header2", .value = "  \"a  b  c\"  " });
+    try headers.append(allocator, .{ .name = "My-header2", .value = "  \"a  b  c\"  " });
     const expected =
         \\content-type:application/x-www-form-urlencoded; charset=utf-8
         \\host:iam.amazonaws.com
@@ -1035,12 +1036,12 @@ test "canonical headers" {
 test "canonical request" {
     const allocator = std.testing.allocator;
     var headers = try std.ArrayList(std.http.Header).initCapacity(allocator, 5);
-    defer headers.deinit();
+    defer headers.deinit(allocator);
-    try headers.append(.{ .name = "User-agent", .value = "c sdk v1.0" });
+    try headers.append(allocator, .{ .name = "User-agent", .value = "c sdk v1.0" });
     // In contrast to AWS CRT (aws-c-auth), we add the date as part of the
     // signing operation. They add it as part of the canonicalization
-    try headers.append(.{ .name = "X-Amz-Date", .value = "20150830T123600Z" });
+    try headers.append(allocator, .{ .name = "X-Amz-Date", .value = "20150830T123600Z" });
-    try headers.append(.{ .name = "Host", .value = "example.amazonaws.com" });
+    try headers.append(allocator, .{ .name = "Host", .value = "example.amazonaws.com" });
     const req = base.Request{
         .path = "/",
         .method = "GET",
@@ -1095,10 +1096,10 @@ test "can sign" {
 
     const allocator = std.testing.allocator;
     var headers = try std.ArrayList(std.http.Header).initCapacity(allocator, 5);
-    defer headers.deinit();
+    defer headers.deinit(allocator);
-    try headers.append(.{ .name = "Content-Type", .value = "application/x-www-form-urlencoded; charset=utf-8" });
+    try headers.append(allocator, .{ .name = "Content-Type", .value = "application/x-www-form-urlencoded; charset=utf-8" });
-    try headers.append(.{ .name = "Content-Length", .value = "13" });
+    try headers.append(allocator, .{ .name = "Content-Length", .value = "13" });
-    try headers.append(.{ .name = "Host", .value = "example.amazonaws.com" });
+    try headers.append(allocator, .{ .name = "Host", .value = "example.amazonaws.com" });
     const req = base.Request{
         .path = "/",
         .query = "",
@@ -1165,25 +1166,25 @@ test "can verify server request" {
         "X-Amz-Date: 20230908T170252Z\r\n" ++
         "x-amz-content-sha256: fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9\r\n" ++
         "Authorization: AWS4-HMAC-SHA256 Credential=ACCESS/20230908/us-west-2/s3/aws4_request, SignedHeaders=accept;content-length;content-type;host;x-amz-content-sha256;x-amz-date;x-amz-storage-class, Signature=fcc43ce73a34c9bd1ddf17e8a435f46a859812822f944f9eeb2aabcd64b03523\r\n\r\nbar";
-    var read_buffer: [1024]u8 = undefined;
+    var reader = std.Io.Reader.fixed(req);
-    @memcpy(read_buffer[0..req.len], req);
     var server: std.http.Server = .{
-        .connection = undefined,
+        .out = undefined, // We're not sending a response here
-        .state = .ready,
+        .reader = .{
-        .read_buffer = &read_buffer,
+            .in = &reader,
-        .read_buffer_len = req.len,
+            .interface = undefined,
-        .next_request_start = 0,
+            .state = .ready,
+            .max_head_len = req.len,
+        },
     };
     var request: std.http.Server.Request = .{
         .server = &server,
-        .head_end = req.len - 3,
+        .head = undefined,
-        .head = try std.http.Server.Request.Head.parse(read_buffer[0 .. req.len - 3]),
+        .head_buffer = &.{},
-        .reader_state = undefined,
     };
+    // I think we need a request.receiveHead() call here
 
     // std.testing.log_level = .debug;
-    var fbs = std.io.fixedBufferStream("bar");
+    try std.testing.expect(try verifyServerRequest(allocator, &request, struct {
-    try std.testing.expect(try verifyServerRequest(allocator, &request, fbs.reader(), struct {
         cred: Credentials,
 
         const Self = @This();
@@ -1221,22 +1222,24 @@ test "can verify server request without x-amz-content-sha256" {
     const req_data = head ++ body;
     var read_buffer: [2048]u8 = undefined;
     @memcpy(read_buffer[0..req_data.len], req_data);
+    var reader = std.Io.Reader.fixed(&read_buffer);
     var server: std.http.Server = .{
-        .connection = undefined,
+        .out = undefined, // We're not sending a response here
-        .state = .ready,
+        .reader = .{
-        .read_buffer = &read_buffer,
+            .interface = undefined,
-        .read_buffer_len = req_data.len,
+            .in = &reader,
-        .next_request_start = 0,
+            .state = .ready,
+            .max_head_len = 1024,
+        },
     };
     var request: std.http.Server.Request = .{
         .server = &server,
-        .head_end = head.len,
+        .head = undefined,
-        .head = try std.http.Server.Request.Head.parse(read_buffer[0..head.len]),
+        .head_buffer = &.{},
-        .reader_state = undefined,
     };
     {
-        var h = std.ArrayList(std.http.Header).init(allocator);
+        var h = try std.ArrayList(std.http.Header).initCapacity(allocator, 4);
-        defer h.deinit();
+        defer h.deinit(allocator);
         const signed_headers = &[_][]const u8{ "content-type", "host", "x-amz-date", "x-amz-target" };
         var it = request.iterateHeaders();
         while (it.next()) |source| {
@@ -1245,7 +1248,7 @@ test "can verify server request without x-amz-content-sha256" {
                 match = std.ascii.eqlIgnoreCase(s, source.name);
                 if (match) break;
             }
-            if (match) try h.append(.{ .name = source.name, .value = source.value });
+            if (match) try h.append(allocator, .{ .name = source.name, .value = source.value });
         }
         const req = base.Request{
             .path = "/",
@@ -1282,9 +1285,7 @@ test "can verify server request without x-amz-content-sha256" {
     }
 
     { // verification
-        var fis = std.io.fixedBufferStream(body[0..]);
+        try std.testing.expect(try verifyServerRequest(allocator, &request, struct {
-
-        try std.testing.expect(try verifyServerRequest(allocator, &request, fis.reader(), struct {
             cred: Credentials,
 
             const Self = @This();

src/url.zig

@@ -103,60 +103,72 @@ pub fn encodeInternal(
     return rc;
 }
 
-fn testencode(allocator: std.mem.Allocator, expected: []const u8, value: anytype, comptime options: EncodingOptions) !void {
+const ValidationWriter = struct {
-    const ValidationWriter = struct {
+    const Self = @This();
-        const Self = @This();
+    pub const Writer = std.io.Writer(*Self, Error, write);
-        pub const Writer = std.io.Writer(*Self, Error, write);
+    pub const Error = error{
-        pub const Error = error{
+        TooMuchData,
-            TooMuchData,
+        DifferentData,
-            DifferentData,
-        };
-
-        expected_remaining: []const u8,
-
-        fn init(exp: []const u8) Self {
-            return .{ .expected_remaining = exp };
-        }
-
-        pub fn writer(self: *Self) Writer {
-            return .{ .context = self };
-        }
-
-        fn write(self: *Self, bytes: []const u8) Error!usize {
-            // std.debug.print("{s}\n", .{bytes});
-            if (self.expected_remaining.len < bytes.len) {
-                std.log.warn(
-                    \\====== expected this output: =========
-                    \\{s}
-                    \\======== instead found this: =========
-                    \\{s}
-                    \\======================================
-                , .{
-                    self.expected_remaining,
-                    bytes,
-                });
-                return error.TooMuchData;
-            }
-            if (!std.mem.eql(u8, self.expected_remaining[0..bytes.len], bytes)) {
-                std.log.warn(
-                    \\====== expected this output: =========
-                    \\{s}
-                    \\======== instead found this: =========
-                    \\{s}
-                    \\======================================
-                , .{
-                    self.expected_remaining[0..bytes.len],
-                    bytes,
-                });
-                return error.DifferentData;
-            }
-            self.expected_remaining = self.expected_remaining[bytes.len..];
-            return bytes.len;
-        }
     };
 
+    expected_remaining: []const u8,
+    writer: std.Io.Writer,
+
+    fn init(exp: []const u8) Self {
+        return .{
+            .expected_remaining = exp,
+            .writer = .{
+                .buffer = &.{},
+                .vtable = &.{
+                    .drain = drain,
+                },
+            },
+        };
+    }
+
+    fn drain(w: *std.Io.Writer, data: []const []const u8, splat: usize) std.Io.Writer.Error!usize {
+        if (splat > 0) @panic("No splat");
+        const self: *ValidationWriter = @fieldParentPtr("writer", w);
+
+        var bytes: usize = 0;
+        for (data) |d| bytes += try self.write(d);
+        return bytes;
+    }
+
+    fn write(self: *Self, bytes: []const u8) std.Io.Writer.Error!usize {
+        if (self.expected_remaining.len < bytes.len) {
+            std.log.warn(
+                \\====== expected this output: =========
+                \\{s}
+                \\======== instead found this: =========
+                \\{s}
+                \\======================================
+            , .{
+                self.expected_remaining,
+                bytes,
+            });
+            return error.WriteFailed;
+        }
+        if (!std.mem.eql(u8, self.expected_remaining[0..bytes.len], bytes)) {
+            std.log.warn(
+                \\====== expected this output: =========
+                \\{s}
+                \\======== instead found this: =========
+                \\{s}
+                \\======================================
+            , .{
+                self.expected_remaining[0..bytes.len],
+                bytes,
+            });
+            return error.WriteFailed;
+        }
+        self.expected_remaining = self.expected_remaining[bytes.len..];
+        return bytes.len;
+    }
+};
+fn testencode(allocator: std.mem.Allocator, expected: []const u8, value: anytype, comptime options: EncodingOptions) !void {
     var vos = ValidationWriter.init(expected);
-    try encode(allocator, value, vos.writer(), options);
+    try encode(allocator, value, &vos.writer, options);
     if (vos.expected_remaining.len > 0) return error.NotEnoughData;
 }
 
@@ -238,17 +250,17 @@ test "can urlencode an EC2 Filter" {
         },
         .{},
     ) catch |err| {
-        var al = std.ArrayList(u8).init(std.testing.allocator);
+        var aw = std.Io.Writer.Allocating.init(std.testing.allocator);
-        defer al.deinit();
+        defer aw.deinit();
         try encode(
             std.testing.allocator,
             Request{
                 .filters = @constCast(&[_]Filter{.{ .name = "foo", .values = @constCast(&[_][]const u8{"bar"}) }}),
             },
-            al.writer(),
+            &aw.writer,
             .{},
         );
-        std.log.warn("Error found. Full encoding is '{s}'", .{al.items});
+        std.log.warn("Error found. Full encoding is '{s}'", .{aw.written()});
         return err;
     };
 }