diff --git a/types/aws-lambda/test/dynamodb-tests.ts b/types/aws-lambda/test/dynamodb-tests.ts
index 6d1dfa9d556a65..6cad81e146d71b 100644
--- a/types/aws-lambda/test/dynamodb-tests.ts
+++ b/types/aws-lambda/test/dynamodb-tests.ts
@@ -1,4 +1,4 @@
-import { DynamoDBBatchResponse, DynamoDBStreamEvent, DynamoDBStreamHandler } from "aws-lambda";
+import { DynamoDBBatchResponse, DynamoDBStreamEvent, DynamoDBStreamHandler, StreamRecord } from "aws-lambda";
 
 // TODO: Update test to read all event properties, and write all result
 //       properties, like the user will.
@@ -97,6 +97,17 @@ const event: DynamoDBStreamEvent = {
     ],
 };
 
+const keys: StreamRecord = {
+    Keys: {
+        // expect error when using multiple attributes in AttributeValue type
+        // @ts-expect-error
+        Id: {
+            N: "101",
+            S: "Extra",
+        },
+    },
+};
+
 const streamHandlerWithResponse: DynamoDBStreamHandler = async (event, context, callback) => {
     // Check result type
     let result: DynamoDBBatchResponse;
diff --git a/types/aws-lambda/trigger/dynamodb-stream.d.ts b/types/aws-lambda/trigger/dynamodb-stream.d.ts
index ac190a39812374..30e39da2d24083 100644
--- a/types/aws-lambda/trigger/dynamodb-stream.d.ts
+++ b/types/aws-lambda/trigger/dynamodb-stream.d.ts
@@ -3,19 +3,27 @@ import { Handler } from "../handler";
 // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
 export type DynamoDBStreamHandler = Handler<DynamoDBStreamEvent, DynamoDBBatchResponse | void>;
 
+// eslint-disable-next-line @definitelytyped/strict-export-declare-modifiers, @definitelytyped/no-single-element-tuple-type
+type Merge<T> = [{ [K in keyof T]: T[K] }][number];
+
+// eslint-disable-next-line @definitelytyped/strict-export-declare-modifiers
+type ExclusivePropertyUnion<T, P = keyof T> = P extends any
+    ? Merge<{ [K in Extract<keyof T, P>]: T[K] } & { [K in Exclude<keyof T, P>]?: never }>
+    : never;
+
 // http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_streams_AttributeValue.html
-export interface AttributeValue {
-    B?: string | undefined;
-    BS?: string[] | undefined;
-    BOOL?: boolean | undefined;
-    L?: AttributeValue[] | undefined;
-    M?: { [id: string]: AttributeValue } | undefined;
-    N?: string | undefined;
-    NS?: string[] | undefined;
-    NULL?: boolean | undefined;
-    S?: string | undefined;
-    SS?: string[] | undefined;
-}
+export type AttributeValue = ExclusivePropertyUnion<{
+    B: string;
+    BOOL: boolean;
+    BS: string[];
+    L: AttributeValue[];
+    M: Record<string, AttributeValue>;
+    N: string;
+    NS: string[];
+    NULL: boolean;
+    S: string;
+    SS: string[];
+}>;
 
 // http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_streams_StreamRecord.html
 export interface StreamRecord {
diff --git a/types/emscripten/emscripten-tests.ts b/types/emscripten/emscripten-tests.ts
index 62d644f3671929..bb85037eecc642 100644
--- a/types/emscripten/emscripten-tests.ts
+++ b/types/emscripten/emscripten-tests.ts
@@ -104,6 +104,12 @@ function FSTest(): void {
     const bothDevice = FS.createDevice("/", "console", () => 66, (c: number) => console.log(c)); // Returns 'B' (66)
     const simpleDevice = FS.createDevice("/", "null");
 
+    // Test createDevice.major property access
+    const majorNumber: number = FS.createDevice.major;
+    FS.createDevice.major = 128; // Test assignment
+    // $ExpectType number
+    FS.createDevice.major;
+
     FS.writeFile("file", "foobar");
     FS.symlink("file", "link");
 
diff --git a/types/emscripten/index.d.ts b/types/emscripten/index.d.ts
index 87082b3141cac1..fbbecd971caf74 100644
--- a/types/emscripten/index.d.ts
+++ b/types/emscripten/index.d.ts
@@ -268,12 +268,16 @@ declare namespace FS {
     function makedev(ma: number, mi: number): number;
     function registerDevice(dev: number, ops: Partial<StreamOps>): void;
     function getDevice(dev: number): { stream_ops: StreamOps };
-    function createDevice(
-        parent: string | FSNode,
-        name: string,
-        input?: () => number | null | undefined,
-        output?: (c: number) => any,
-    ): FSNode;
+    var createDevice:
+        & ((
+            parent: string | FSNode,
+            name: string,
+            input?: (() => number | null | undefined) | null,
+            output?: ((code: number) => void) | null,
+        ) => FSNode)
+        & {
+            major: number;
+        };
 
     //
     // core
diff --git a/types/md5/package.json b/types/md5/package.json
index 9d0e8a5e429b56..2b1f5428ed715c 100644
--- a/types/md5/package.json
+++ b/types/md5/package.json
@@ -13,10 +13,6 @@
             "name": "Bill Sourour",
             "githubUsername": "arcdev1"
         },
-        {
-            "name": "Cameron Crothers",
-            "githubUsername": "jprogrammer"
-        },
         {
             "name": "Piotr Błażejewicz",
             "githubUsername": "peterblazejewicz"
diff --git a/types/react-reconciler/index.d.ts b/types/react-reconciler/index.d.ts
index 036024deb22716..9123efaec383c1 100644
--- a/types/react-reconciler/index.d.ts
+++ b/types/react-reconciler/index.d.ts
@@ -926,6 +926,10 @@ declare namespace ReactReconciler {
 
     type IntersectionObserverOptions = any;
 
+    interface BaseErrorInfo {
+        componentStack?: string;
+    }
+
     interface Reconciler<Container, Instance, TextInstance, SuspenseInstance, FormInstance, PublicInstance> {
         createContainer(
             containerInfo: Container,
@@ -934,7 +938,10 @@ declare namespace ReactReconciler {
             isStrictMode: boolean,
             concurrentUpdatesByDefaultOverride: null | boolean,
             identifierPrefix: string,
-            onRecoverableError: (error: Error) => void,
+            onUncaughtError: (error: Error, info: BaseErrorInfo & { errorBoundary?: Component }) => void,
+            onCaughtError: (error: Error, info: BaseErrorInfo) => void,
+            onRecoverableError: (error: Error, info: BaseErrorInfo) => void,
+            onDefaultTransitionIndicator: () => void,
             transitionCallbacks: null | TransitionTracingCallbacks,
         ): OpaqueRoot;