segfault on spicyz - Githubissues

on 7.0.0-dev.254 I tried compiling a spicy script that worked fine on 6.0.3 and got a seg fault. another old script compiled fine, have not tried to to biscect somehow to see what triggers. Have no idea how to usefully use a debugger anymore so here is the info I get:

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x58)
    frame #0: 0x000000010164d520 libhilti.dylib`hilti::QualifiedType::_type() const [inlined] hilti::ast::detail::ContextIndex<(char)84>::operator!=(this=0x0000000000000058, other=<unavailable>) const at ast-context.h:75:63 [opt]
   72       explicit operator bool() const { return *this != None; }
   73
   74       bool operator==(const ContextIndex& other) const { return _value == other._value; }
-> 75       bool operator!=(const ContextIndex& other) const { return _value != other._value; }
   76
   77       ContextIndex(const ContextIndex& other) = default;
   78       ContextIndex(ContextIndex&& other) noexcept = default;
Target 0: (spicyz) stopped.
warning: libhilti.dylib was compiled with optimization - stepping may behave oddly; variables may not be available.

(lldb) thread backtrace
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x58)
  * frame #0: 0x000000010159eb50 libhilti.dylib`hilti::QualifiedType::_type() const [inlined] hilti::ast::detail::ContextIndex<(char)84>::operator!=(this=0x0000000000000058, other=<unavailable>) const at ast-context.h:75:63 [opt]
    frame #1: 0x000000010159eb50 libhilti.dylib`hilti::QualifiedType::_type() const [inlined] hilti::ast::detail::ContextIndex<(char)84>::operator bool(this=0x0000000000000058) const at ast-context.h:72:51 [opt]
    frame #2: 0x000000010159eb50 libhilti.dylib`hilti::QualifiedType::_type(this=0x0000000000000000) const at type.cc:129:10 [opt]
    frame #3: 0x00000001016d7f98 libhilti.dylib`(anonymous namespace)::VisitorPass2::operator()(hilti::operator_::map::In*) [inlined] hilti::QualifiedType::type(this=<unavailable>, follow=true) const at node.h:0:16 [opt]
    frame #4: 0x00000001016d7f94 libhilti.dylib`(anonymous namespace)::VisitorPass2::operator()(hilti::operator_::map::In*) [inlined] hilti::type::Map::keyType(this=<unavailable>) const at map.h:67:61 [opt]
    frame #5: 0x00000001016d7f64 libhilti.dylib`(anonymous namespace)::VisitorPass2::operator()(this=0x000000016fdfda20, n=0x00006000034c2e20) at resolver.cc:1401:88 [opt]
    frame #6: 0x00000001016ca854 libhilti.dylib`hilti::detail::resolver::resolve(hilti::Builder*, hilti::Node*) at visitor.h:334:17 [opt]
    frame #7: 0x00000001016ca810 libhilti.dylib`hilti::detail::resolver::resolve(builder=0x000060000059c0c0, root=0x000060000339c050) at resolver.cc:1627:5 [opt]
    frame #8: 0x00000001013ba770 libhilti.dylib`hilti::rt::Result<hilti::rt::Nothing> _runHook<bool (* hilti::Plugin::*)(hilti::Builder*, hilti::Node*), hilti::Builder*, hilti::node::RetainedPtr<hilti::ASTRoot>>(modified=0x000000016fdfdc37, plugin=0x0000000126e04b40, hook=0x0000000000000088, description="resolving AST", args=0x000000016fdfdcd8, args=0x0000600002c9c030) at ast-context.cc:387:10 [opt]
    frame #9: 0x00000001013b9014 libhilti.dylib`hilti::ASTContext::_resolve(hilti::Builder*, hilti::Plugin const&) [inlined] hilti::ASTContext::_resolveRoot(this=0x0000600002c9c000, modified=0x000000016fdfdc37, builder=0x000060000059c0c0, plugin=0x0000000126e04b40) at ast-context.cc:517:12 [opt]
    frame #10: 0x00000001013b8fd8 libhilti.dylib`hilti::ASTContext::_resolve(this=<unavailable>, builder=<unavailable>, plugin=<unavailable>) at ast-context.cc:542:24 [opt]
    frame #11: 0x00000001013b8694 libhilti.dylib`hilti::ASTContext::processAST(this=0x0000600002c9c000, builder=0x000060000059c0c0, driver=0x000000016fdfe628) at ast-context.cc:414:28 [opt]
    frame #12: 0x000000010168a810 libhilti.dylib`hilti::Driver::compileUnits(this=0x000000016fdfe628) at driver.cc:671:45 [opt]
    frame #13: 0x000000010168b5e4 libhilti.dylib`hilti::Driver::compile(this=0x000000016fdfe628) at driver.cc:746:20 [opt]
    frame #14: 0x0000000100005930 spicyz`zeek::spicy::Driver::compile(this=0x000000016fdfe628) at driver.cc:218:36 [opt]
    frame #15: 0x0000000100061bf0 spicyz`main(argc=<unavailable>, argv=<unavailable>) at main.cc:274:27 [opt]
    frame #16: 0x000000019333e0e0 dyld`start + 2360

EDIT

Reproducer:

module foo;

public type X = unit {
    var a: map<bytes, bytes>;
    : Y(self);
};

type Y = unit(x: X) {
    on %done {
        b"" in x.a;
    }
};

zeek / spicy

segfault on spicyz #1743

EDIT