#3016 Internal error when compiling array with function call in array declaration

[Gabriel Ravier]

char arr[f(d) ? 0 : 0];

Compiling this with sdcc test.c gives Internal error: validateLink failed in SPEC_SCLS(cexpr->etype) @ SDCCast.c:1858: expected SPECIFIER, got null-link. Tested with commit 11647.

[Christopher Bazley]

Exact original malformed array declaration gets source diagnostics, with no validateLink failure.
See https://godbolt.org/z/xM9boKfff

Making the sample declaration maximally valid yields the expected warning
<source>:6: error 288: object of variable length array type not supported
See https://godbolt.org/z/1cs5bcnaT

[Christopher Bazley]

Regression test added as [r17053]