VS Code does not support 32-bit linux as of June 2019 (version 1.36) because it upgraded to a version of Electron that does not support 32-bit linux. [link]

Our extension updated its minimum supported VS Code version so that it can use newer VS Code features. Unfortunately, as a result of this update, we will no longer be supporting 32-bit linux.

0.27.0 is the last version of the C++ extension with 32-bit linux support.