--show-snippets does not work for parse errors

[davidcok]

Dafny version

3.10.0+dev

Code to produce this issue

const c = 5

Command to run and resulting output

dafny verify --show-snippets test.dfy

What happened?

Got:
/Users/davidcok/projects/dafny/dafny/Test/tmp.dfy(1,10): Error: a const field should be initialized using ':=', not '='
1 parse errors detected in /Users/davidcok/projects/dafny/dafny/Test/tmp.dfy

Expected to see a display of source code, like this for verification errors:
|
3 | assert false;
| ^^^^^

What type of operating system are you experiencing the problem on?

Mac