Issue Id: b78998c2-8b98-8dfe-71f6-9a2ef06d29b8

Versions
- 1.38.0-insider (9/3/2019 11:14:03 PM)
Stack
TypeError: Cannot read property '0' of undefined
/vs/editor/contrib/parameterHints/parameterHintsWidget.ts#281:48 (getParameterLabel)
/vs/editor/contrib/parameterHints/parameterHintsWidget.ts#245:32 (render)
/vs/editor/contrib/parameterHints/parameterHintsWidget.ts#64:9 (call)
/vs/base/common/event.ts#572:15 (fire)
/vs/editor/contrib/parameterHints/parameterHintsModel.ts#199:25
at process._tickCallback (<REDACTED: user-file-path>:68:7)