[ICE] More cycle detection gone wrong

[jyn514]

Expected behavior
RCC should detect the cycle and replace f only one time.

Actual Behavior
RCC recurses forever and segfaults.

Code

#define f(a) f(1 + 2)
f(1)

thread 'main' has overflowed its stack
fatal runtime error: stack overflow
Aborted (core dumped)

Backtrace

(gdb) where
#0  0x00005555557f2e1a in rcc::lex::cpp::PreProcessor::replace_function (
    self=<error reading variable: Cannot access memory at address 0x7fffff7feb30>, 
    name=<error reading variable: Cannot access memory at address 0x7fffff7feb38>, 
    start=<error reading variable: Cannot access memory at address 0x7fffff7feb3c>)
    at src/lex/cpp.rs:595
#1  0x00005555557f2c13 in rcc::lex::cpp::PreProcessor::replace_id (
    self=0x7fffffffa1f8, name=..., location=...) at src/lex/cpp.rs:593
#2  0x00005555557ef4cd in rcc::lex::cpp::PreProcessor::handle_token (
    self=0x7fffffffa1f8, token=..., location=...) at src/lex/cpp.rs:243
#3  0x00005555557edac3 in <rcc::lex::cpp::PreProcessor as core::iter::traits::iterator::Iterator>::next (self=0x7fffffffa1f8) at src/lex/cpp.rs:141
#4  0x00005555557f38f7 in rcc::lex::cpp::PreProcessor::replace_function (
    self=0x7fffffffa1f8, name=..., start=26) at src/lex/cpp.rs:657
#5  0x00005555557f2c13 in rcc::lex::cpp::PreProcessor::replace_id (
    self=0x7fffffffa1f8, name=..., location=...) at src/lex/cpp.rs:593
#6  0x00005555557ef4cd in rcc::lex::cpp::PreProcessor::handle_token (
    self=0x7fffffffa1f8, token=..., location=...) at src/lex/cpp.rs:243
...
#3946 0x00005555557ef4cd in rcc::lex::cpp::PreProcessor::handle_token (
    self=0x7fffffffa1f8, token=..., location=...) at src/lex/cpp.rs:243
#3947 0x00005555557ee074 in <rcc::lex::cpp::PreProcessor as core::iter::traits::iterator::Iterator>::next (self=0x7fffffffa1f8) at src/lex/cpp.rs:154
#3948 0x00005555557a2402 in rcc::compile (buf=..., opt=0x7fffffffd538, file=..., 
    files=0x7fffffffd920) at src/lib.rs:161
#3949 0x00005555555faa88 in rcc::real_main (buf=..., file_db=0x7fffffffd920, 
    file_id=..., opt=0x7fffffffd538, output=0x55555612cdb0) at src/main.rs:110
#3950 0x00005555555fc312 in rcc::main () at src/main.rs:176