#3 Error when formatting and there's MatchParen

[Anonymous]

When I want to Format just some amount of selected lines in Visual mode, I get the following
error:

---

Error detected while processing function 715..991..985..982..981..929..971..913:
line 4:
E716: Key not present in Dictionary: pattern,'^(\%#=\d)\?','\1\C',"")})
E116: Invalid arguments for function substitute(v:val.pattern,'^(\%#=\d)\?','\1\C',"")})
E116: Invalid arguments for function extend(v:val, {"pattern": substitute(v:val.pattern,'^(\%#=\d)\?','\1\C',"")})
Error detected while processing function 715..991..985:
line 4:
E171: Missing :endif

---

The situation that this happens is specific, and I know how to avoid the error.

It happens only when the cursor is not positioned past the end of the selection area.

For example, in the following C file:

int main() {
}

If I select the two lines in Visual mode using line-selection (shift-v), but keep the cursor
at } and do :‘<,’>Format format, the error shows up, if I put the cursor after }, it executes
without problems.

This is the echo for getmatches() put just above the offending formatvim line:

• When the cursor is after '}': [{'group': 'OverLength', 'pattern': '\%81v.+', 'priority': 10, 'id': 1}]
• When the cursor is over ‘}’: [{'group': 'OverLength', 'pattern': '\%81v.+', 'priority': 10, 'id': 1}, {'group': 'MatchParen', 'id': 3, 'priority': 10, 'pos1': [2, 1, 1], 'pos2': [1, 12, 1]}]

[ZyX]

Closed from https://sourceforge.net/p/formatvim/code/ci/7075086701b68c8dc4d28fd7c16c8a8c5ec009c5/.

[Anonymous]

Thanks!