V3 backport #10757

.changeset/mean-parks-take.md

@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+fix `console.debug` logs not being logged at the `info` level (as users expect)

fixtures/worker-logs/tests/index.test.ts

@@ -69,6 +69,7 @@ describe("'wrangler dev' correctly displays logs", () => {
 			expect(output).toMatchInlineSnapshot(`
 				"X [ERROR] <<<<<this is an error>>>>>
 				▲ [WARNING] <<<<<this is a warning>>>>>
+				<<<<<this is a debug message>>>>>
 				<<<<<this is a log>>>>>
 				<<<<<this is an info message>>>>>"
 			`);
@@ -79,6 +80,7 @@ describe("'wrangler dev' correctly displays logs", () => {
 			expect(output).toMatchInlineSnapshot(`
 				"X [ERROR] <<<<<this is an error>>>>>
 				▲ [WARNING] <<<<<this is a warning>>>>>
+				<<<<<this is a debug message>>>>>
 				<<<<<this is a log>>>>>
 				<<<<<this is an info message>>>>>"
 			`);
@@ -89,6 +91,7 @@ describe("'wrangler dev' correctly displays logs", () => {
 			expect(output).toMatchInlineSnapshot(`
 				"X [ERROR] <<<<<this is an error>>>>>
 				▲ [WARNING] <<<<<this is a warning>>>>>
+				<<<<<this is a debug message>>>>>
 				<<<<<this is an info message>>>>>"
 			`);
 		});

packages/wrangler/src/dev/miniflare/stdio.ts

@@ -185,7 +185,11 @@ function logStructuredLog(
 	}
 
 	if (level === "debug") {
-		return logger.debug(message);
+		// note that debug logs are logged at the info level, this is like so because before structured logs
+		// were introduced developers were used to call `console.debug` and get their logs in the terminal
+		// during local development and we don't want to break such workflow in a non-major release
+		// (For more context see: https://github.com/cloudflare/workers-sdk/issues/10690)
+		return logger.info(message);
 	}
 
 	if (level === "error") {