[ICE] fuzzer reached unreachable code

[Byter09]

Expected behavior

It should not panic and give out an error. (To be real, I have no idea if thats even valid code).
Actual Behavior

The application panicked (crashed).
Message:  internal error: entered unreachable code: should have been caught already: Str([0])
Location: src/parse/decl.rs:1609

Code

I[K?*"":""]

Backtrace

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
                          (5 post panic frames hidden)                          
 5: rcc::parse::decl::<impl rcc::data::Expr>::const_int::h7558b061c5eecf3b
    at src/parse/decl.rs:1609
 6: rcc::parse::decl::<impl rcc::parse::Parser<I>>::postfix_type::h0c9ab98fd21fcd3d
    at src/parse/decl.rs:1036
 7: rcc::parse::decl::<impl rcc::parse::Parser<I>>::direct_declarator::hf3ef96ced0e3e167
    at src/parse/decl.rs:1168
 8: rcc::parse::decl::<impl rcc::parse::Parser<I>>::declarator::h64451eaa96cd097e
    at src/parse/decl.rs:1250
 9: rcc::parse::decl::<impl rcc::parse::Parser<I>>::declaration::h0d6835c19d8d7262
    at src/parse/decl.rs:79
10: <rcc::parse::Parser<I> as core::iter::traits::iterator::Iterator>::next::{{closure}}::h85b37aec70557a37
    at src/parse/mod.rs:147
11: core::option::Option<T>::or_else::h182c3cc48d3224d6
    at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libcore/option.rs:754
12: <rcc::parse::Parser<I> as core::iter::traits::iterator::Iterator>::next::h87a36bb3ea7e59d8
    at src/parse/mod.rs:125
13: <&mut I as core::iter::traits::iterator::Iterator>::next::hb3f95f4dd7848df7
    at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libcore/iter/traits/iterator.rs:2991
14: rcc::compile::h089ba22ff0e2d41e
    at src/lib.rs:163
15: rcc::real_main::haaab50c764bab8a4
    at src/main.rs:109
16: rcc::main::hf916b0e3bfc4e703
    at src/main.rs:172
                        (12 runtime init frames hidden)

[jyn514]

With fixed syntax so clang gives an error:

$ run_clang
int K;
int I[K ? *"" : ""];
<stdin>:2:9: error:
      pointer/integer type mismatch
      in conditional expression
      ('int' and 'char *')
      [-Werror,-Wconditional-type-mismatch]
int I[K ? *"" : ""];
        ^ ~~~   ~~
<stdin>:2:7: error: size of array
      has non-integer type 'char *'
int I[K ? *"" : ""];
      ^~~~~~~~~~~~