Oliver Stöneberg

fuzzing crash in `Macro::expandToken()`

1

```cpp #define S(z)defined z##C S(, ``` ``` simplecpp.cpp:2133:58: runtime error: member call on null pointer of type 'const struct Token' #0 0x5cd316211cbd in simplecpp::Macro::expandToken(simplecpp::TokenList*, simplecpp::Location const&, simplecpp::Token const*, std::unordered_map const&,...

If we pass a directory as the input to simplecpp it will be treated as an empty file. We should report this as non-existing in all cases. there are also...

Encountered while working on #438. ```cpp # if __has_extension(cxx_rvalue_references) # endif ``` ``` a.cpp:1: syntax error: failed to evaluate #if condition, undefined function-like macro invocation: __has_extension( ... ) ``` See...

Encountered while working on #438. ```cpp # if __has_attribute(maybe_unused) # endif ``` ``` a.cpp:1: syntax error: failed to evaluate #if condition, undefined function-like macro invocation: __has_attribute( ... ) ``` See...

Encountered while working on #438. ```cpp # if __has_feature(attribute_availability_with_strict) # endif ``` ``` a.cpp:1: syntax error: failed to evaluate #if condition, undefined function-like macro invocation: __has_feature( ... ) ``` See...

Encountered while working on #438. ```cpp # if __has_cpp_attribute(maybe_unused) # endif ``` ``` a.cpp:1: syntax error: failed to evaluate #if condition, undefined function-like macro invocation: __has_cpp_attribute( ... ) ``` See...

this was masking differences with the lines on which code is placed on compared to actual compilers.