Error for unnamed fixed-length array arguments

[akavel]

I'm getting error like below:

$ cat test.h
void foobar(uint64_t[2]);

$ ~/.nimble/bin/toast -n test.h
# Generated @ 2020-12-14T22:26:39+01:00
# Command line:
#   /home/akavel/.nimble/pkgs/nimterop-0.6.13/nimterop/toast -n test.h

toast.nim(227)           toast
cligen.nim(754)          cligenScope
cligen.nim(672)          dispatchmain
toast.nim(150)           main
toast.nim(30)            process
ast2.nim(1944)           parseNim
ast2.nim(1829)           searchTree
ast2.nim(1809)           processNode
ast2.nim(1749)           addDecl
ast2.nim(1618)           addProc
ast2.nim(660)            newFormalParams
ast2.nim(504)            newIdentDef
comphelp.nim(95)         getNameInfo
getters.nim(219)         getIdentifier
getters.nim(178)         checkIdentifier
assertions.nim(29)       failedAssertImpl
assertions.nim(22)       raiseAssert
fatal.nim(49)            sysFatal
Error: unhandled exception: getters.nim(178, 5) `not name[0].isDigit()` Identifier 'foobar:2' (nskField) starts with a digit '2' which Nim does not allow. Use toast flag '--prefix' or 'cPlugin()' to modify. [AssertionError]

The library I'm trying to link uses the pattern shown above, and I don't know how to workaround this. I checked that non-array unnamed args, as well as array named args, both seem to work separately - but using them together fails:

void foobar(uint64_t zz[2]);  // ok
void foobar(uint64_t);        // ok
void foobar(uint64_t[2]);     // ERROR