fix Issue 7252 - ICE(template.c): 'global.errors' on line 4893 in file 'template.c'
fix up for test/compilable/testfptr.d

The result of syntaxCopy should be re-semantic()-ed.
Add test cass for issue 3682
fix Issue 9208 - [ICE](func.c line 1205) with auto return in recursive function
Fix Issue 1730 - Error message on 'this' reference modifier mismatch when
calling methods is uninformative
Merge pull request #1404 from 9rnsr/fix7252

Issue 7252 - ICE(template.c): 'global.errors' on line 4893 in file 'template.c'
Merge pull request #1407 from AndrejMitrovic/Fix1730

Issue 1730 - Error message on 'this' reference modifier mismatch is uninformative
Merge pull request #1410 from 9rnsr/fix9208

Issue 9208 - [ICE](func.c line 1205) with auto return in recursive function
detab test/runnable/testswitch.d
Add -w option in PERMUTE_ARGS, and fix test cases.

As far as I see, these changes does not affect to the things which are actually tested.
fix Issue 9263 - statement is not reachable when statement is reachable
Merge pull request #1431 from 9rnsr/fix9263

Issue 9263 - statement is not reachable when statement is reachable