• VSCode Version: 1.5.0-insiders
• OS Version: OSX 10.10.5 Yosemite

Steps to Reproduce:

1. Install VSCodeVim or another extension that intercepts common keystrokes while editing code.
2. Begin debugging code.
3. Hit a breakpoint.
4. Open up the debug console and click on the text box used for evaluating expressions.
5. Press a key that VSCodeVim or another extension would typically intercept while editing the document.
6. The text will not show up in the expression evaluation text box. Instead, it will be sent to the extension.

This does not happen in 1.4.0; it seems to have been introduced in the insiders build.