fixes #83906

src/vs/workbench/contrib/debug/browser/repl.ts

@@ -809,13 +809,13 @@ class ReplDelegate extends CachedListVirtualDelegate<IReplElement> {
 		const config = this.configurationService.getValue<IDebugConfiguration>('debug');
 
 		if (!config.console.wordWrap) {
-			return Math.ceil(1.4 * config.console.fontSize);
+			return this.estimateHeight(element, true);
 		}
 
 		return super.getHeight(element);
 	}
 
-	protected estimateHeight(element: IReplElement): number {
+	protected estimateHeight(element: IReplElement, ignoreValueLength = false): number {
 		const config = this.configurationService.getValue<IDebugConfiguration>('debug');
 		const rowHeight = Math.ceil(1.4 * config.console.fontSize);
 		const countNumberOfLines = (str: string) => Math.max(1, (str && str.match(/\r\n|\n/g) || []).length);
@@ -825,7 +825,7 @@ class ReplDelegate extends CachedListVirtualDelegate<IReplElement> {
 		// For every 30 characters increase the number of lines needed
 		if (hasValue(element)) {
 			let value = element.value;
-			let valueRows = countNumberOfLines(value) + Math.floor(value.length / 30);
+			let valueRows = countNumberOfLines(value) + (ignoreValueLength ? 0 : Math.floor(value.length / 30));
 
 			return valueRows * rowHeight;
 		}

src/vs/workbench/contrib/debug/common/replModel.ts

@@ -10,7 +10,7 @@ import { ExpressionContainer } from 'vs/workbench/contrib/debug/common/debugMode
 import { isString, isUndefinedOrNull, isObject } from 'vs/base/common/types';
 import { basenameOrAuthority } from 'vs/base/common/resources';
 import { URI } from 'vs/base/common/uri';
-import { endsWith, startsWith } from 'vs/base/common/strings';
+import { endsWith } from 'vs/base/common/strings';
 import { generateUuid } from 'vs/base/common/uuid';
 import { Emitter } from 'vs/base/common/event';
 
@@ -134,7 +134,7 @@ export class ReplModel {
 
 		if (typeof data === 'string') {
 			const previousElement = this.replElements.length ? this.replElements[this.replElements.length - 1] : undefined;
-			if (!startsWith(data, '\n') && previousElement instanceof SimpleReplElement && previousElement.severity === sev && !endsWith(previousElement.value, '\n') && !endsWith(previousElement.value, '\r\n')) {
+			if (previousElement instanceof SimpleReplElement && previousElement.severity === sev && !endsWith(previousElement.value, '\n') && !endsWith(previousElement.value, '\r\n')) {
 				previousElement.value += data;
 				this._onDidChangeElements.fire();
 			} else {

src/vs/workbench/contrib/debug/test/browser/debugModel.test.ts

@@ -498,13 +498,11 @@ suite('Debug - Model', () => {
 		repl.appendToRepl(session, '3\n4', severity.Info);
 		repl.appendToRepl(session, '5\n', severity.Info);
 		repl.appendToRepl(session, '6', severity.Info);
-		repl.appendToRepl(session, '\n7', severity.Info);
 		elements = <SimpleReplElement[]>repl.getReplElements();
-		assert.equal(elements.length, 4);
+		assert.equal(elements.length, 3);
 		assert.equal(elements[0], '1\n');
 		assert.equal(elements[1], '23\n45\n');
 		assert.equal(elements[2], '6');
-		assert.equal(elements[3], '\n7');
 	});
 
 	test('repl merging', () => {