No JSON object could be decoded

[chud37]

Pressed CTRL+ALT+M in windows, got the above error on line 1 column 0 (char 0).

However when I press CTRL+ALT+SHIFT+M it works except I get a new file (as expected).

I'm trying to minify JS. I'd really like to minify in the same file.

[CedricHadjian]

Same