[ICE] crash on nested functions

[jyn514]

Code

int f(void) {
    typedef unsigned long long int __uint64_t;
    void __bswap_16 (void) { }
    void __bswap_32 (void) {
      return;
    }
    void __bswap_64 (__uint64_t);
}
The application panicked (crashed).
Message:  scope of parser and analyzer should match
Location: src/analyze/mod.rs:386

Expected behavior

This should be a semantic error (can't declare functions except at global scope). gcc decides to make it a gnu extension, though.

Backtrace

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
                          (5 post panic frames hidden)                          
 5: core::option::expect_failed::h9a8bff6ff005b30d
    at src/libcore/option.rs:1203
 6: core::option::Option<T>::expect::h1a1f9ace55b0e81d
    at /rustc/4fb7144ed159f94491249e86d5bbd033b5d60550/src/libcore/option.rs:347
 7: rcc::analyze::Analyzer<I>::parse_specifiers::he3632e7f44645051
    at src/analyze/mod.rs:386
 8: rcc::analyze::Analyzer<I>::parse_type::he103b6aded2e70d2
    at src/analyze/mod.rs:237
 9: rcc::analyze::Analyzer<I>::parse_declarator::h0086950b5f57b0b2
    at src/analyze/mod.rs:876
10: rcc::analyze::Analyzer<I>::parse_declaration::h0ea918c832d82f98
    at src/analyze/mod.rs:154
11: rcc::analyze::Analyzer<I>::parse_external_declaration::h5c5e0e8c54fe0563
    at src/analyze/mod.rs:133
12: <rcc::analyze::Analyzer<T> as core::iter::traits::iterator::Iterator>::next::h16b23d19e6871c02
    at src/analyze/mod.rs:77
13: <&mut I as core::iter::traits::iterator::Iterator>::next::h848395963bfe8aed
    at /rustc/4fb7144ed159f94491249e86d5bbd033b5d60550/src/libcore/iter/traits/iterator.rs:3234
14: rcc::check_semantics::hd31cdd4033b22724
    at src/lib.rs:193
15: rcc::compile::h7e7691f880c5ebf4
    at /home/joshua/src/rust/rcc/src/lib.rs:218
16: rcc::aot_main::h8def1ca0324b8884
    at src/main.rs:134
17: rcc::real_main::h192812ffe776ee2f
    at src/main.rs:122
18: rcc::main::hc67a23664e8d7b5c
    at src/main.rs:200
                        (12 runtime init frames hidden)