"Should have been resolved after parsing"

[jsgf]

I'm getting a "Should have been resolved after parsing" message from Type::canonical_type(). I printed more detail about the type:

thread 'main' panicked at 'Should have been resolved after parsing! Type { name: Some("category_type"), layout: Some(Layout { size: 1, align: 1, packed: false }), kind: ResolvedTypeRef(ItemId(43009)), is_const: false }', /home/engshare/third-party2/rust-bindgen/HEAD/src/build-centos6-native/build/libbindgen/src/ir/ty.rs:359

This appears to be https://github.com/facebook/folly/blob/master/folly/FBString.h#L598-L604:

  typedef uint8_t category_type;

  enum class Category : category_type {
    isSmall = 0,
    isMedium = kIsLittleEndian ? 0x80 : 0x2,
    isLarge = kIsLittleEndian ? 0x40 : 0x1,
  };

[jsgf]

This is on current rust-bindgen master with #352 applied.

[jsgf]

The backtrace is:

   1:     0x7f67283f020f - std::sys::backtrace::tracing::imp::write::h6f1d53a70916b90d
   2:     0x7f67283f54ed - std::panicking::default_hook::{{closure}}::h137e876f7d3b5850
   3:     0x7f67283f440a - std::panicking::default_hook::h0ac3811ec7cee78c
   4:     0x7f67283f49a8 - std::panicking::rust_panic_with_hook::hc303199e04562edf
   5:     0x7f67283f4842 - std::panicking::begin_panic::h6ed03353807cf54d
   6:     0x7f67283f4780 - std::panicking::begin_panic_fmt::hc321cece241bb2f5
   7:     0x7f6728182571 - libbindgen::ir::enum_ty::Enum::from_ty::h79afcd3700c3375c
   8:     0x7f672818b8d9 - libbindgen::ir::ty::Type::from_clang_ty::h96de7b4df8f64a57
   9:     0x7f6728187d76 - <libbindgen::ir::item::Item as libbindgen::parse::ClangItemParser>::from_ty_with_id::h3b18bde2dfd7e3bb
  10:     0x7f6728186a2f - <libbindgen::ir::item::Item as libbindgen::parse::ClangItemParser>::parse::h748c9a7eee18e573
  11:     0x7f6728172200 - libbindgen::clang::visit_children::h01c4c84a308b4cc9
  12:     0x7f67247d2cd3 - _ZN5clang8cxcursor13CursorVisitor5VisitE8CXCursorb
  13:     0x7f67247d3ca0 - _ZN5clang8cxcursor13CursorVisitor23handleDeclForVisitationEPKNS_4DeclE
  14:     0x7f67247d3dbf - _ZN5clang8cxcursor13CursorVisitor16VisitDeclContextEPNS_11DeclContextE
  15:     0x7f67247d27b8 - _ZN5clang8cxcursor13CursorVisitor13VisitChildrenE8CXCursor
  16:     0x7f67247db7f9 - clang_visitChildren
  17:     0x7f6728381547 - clang_sys::clang_visitChildren::h131b51420ac8c1c5
  18:     0x7f672817903d - libbindgen::ir::comp::CompInfo::from_ty::hae6bdbcf9a788e3f
  19:     0x7f672818cf14 - libbindgen::ir::ty::Type::from_clang_ty::h96de7b4df8f64a57
  20:     0x7f6728187d76 - <libbindgen::ir::item::Item as libbindgen::parse::ClangItemParser>::from_ty_with_id::h3b18bde2dfd7e3bb
  21:     0x7f6728186a2f - <libbindgen::ir::item::Item as libbindgen::parse::ClangItemParser>::parse::h748c9a7eee18e573
  22:     0x7f67281921b6 - libbindgen::parse_one::hb593feb510752b09
  23:     0x7f6728174632 - libbindgen::clang::visit_children::h708f7eb429c329ed
  24:     0x7f67247d2cd3 - _ZN5clang8cxcursor13CursorVisitor5VisitE8CXCursorb
  25:     0x7f67247d3ca0 - _ZN5clang8cxcursor13CursorVisitor23handleDeclForVisitationEPKNS_4DeclE
  26:     0x7f67247d3dbf - _ZN5clang8cxcursor13CursorVisitor16VisitDeclContextEPNS_11DeclContextE
  27:     0x7f67247d27b8 - _ZN5clang8cxcursor13CursorVisitor13VisitChildrenE8CXCursor
  28:     0x7f67247db7f9 - clang_visitChildren
  29:     0x7f6728381547 - clang_sys::clang_visitChildren::h131b51420ac8c1c5
  30:     0x7f6728185f85 - <libbindgen::ir::item::Item as libbindgen::parse::ClangItemParser>::parse::h748c9a7eee18e573
  31:     0x7f67281921b6 - libbindgen::parse_one::hb593feb510752b09
  32:     0x7f67281738c3 - libbindgen::clang::visit_children::h06ec4cfa51eb2752
  33:     0x7f67247d2cd3 - _ZN5clang8cxcursor13CursorVisitor5VisitE8CXCursorb
  34:     0x7f67247d3ca0 - _ZN5clang8cxcursor13CursorVisitor23handleDeclForVisitationEPKNS_4DeclE
  35:     0x7f67247d3dbf - _ZN5clang8cxcursor13CursorVisitor16VisitDeclContextEPNS_11DeclContextE
  36:     0x7f67247d2995 - _ZN5clang8cxcursor13CursorVisitor13VisitChildrenE8CXCursor
  37:     0x7f67247db7f9 - clang_visitChildren
  38:     0x7f6728381547 - clang_sys::clang_visitChildren::h131b51420ac8c1c5
  39:     0x7f672818f787 - libbindgen::Bindings::generate::h6c75a2cba47e7c38
  40:     0x7f672818ecc6 - libbindgen::Builder::generate::h48eeb1e06e93b2f9
  41:     0x7f672813f4f8 - bindgen::main::h9410c5945bb1c695
  42:     0x7f67283fe3c6 - __rust_maybe_catch_panic
  43:     0x7f67283f3c81 - std::rt::lang_start::h538f8960e7644c80
  44:     0x7f6727502b14 - __libc_start_main

[fitzgen]

Thanks for the bug report :)

[jsgf]

Here's a minimal repro:

Command: bindgen fbinit.i -- -x c++ -std=c++14

fbinit.i:

namespace std
{
  template < class > class fbstring_core;
}
typedef char uint8_t;
namespace std
{
  template < class > class fbstring_core
  {
    typedef uint8_t category_type;
    enum Category:category_type;
  };
}

[emilio]

See #357, thanks for the report and the test case, they're invaluable! :)