The Unstable Book
1.
asm
2.
alloc_system
3.
alloc_jemalloc
4.
test
5.
concat_idents
6.
link_args
7.
log_syntax
8.
non_ascii_idents
9.
plugin_registrar
10.
thread_local
11.
trace_macros
12.
intrinsics
13.
lang_items
14.
link_llvm_intrinsics
15.
linkage
16.
quote
17.
simd
18.
rustc_diagnostic_macros
19.
advanced_slice_patterns
20.
box_syntax
21.
placement_in_syntax
22.
unboxed_closures
23.
allocator
24.
fundamental
25.
main
26.
needs_allocator
27.
on_unimplemented
28.
plugin
29.
simd_ffi
30.
start
31.
structural_match
32.
panic_runtime
33.
needs_panic_runtime
34.
optin_builtin_traits
35.
macro_reexport
36.
staged_api
37.
no_core
38.
box_patterns
39.
dropck_parametricity
40.
dropck_eyepatch
41.
custom_attribute
42.
custom_derive
43.
rustc_attrs
44.
allow_internal_unstable
45.
slice_patterns
46.
associated_consts
47.
const_fn
48.
const_indexing
49.
prelude_import
50.
static_recursion
51.
default_type_parameter_fallback
52.
associated_type_defaults
53.
repr_simd
54.
cfg_target_feature
55.
platform_intrinsics
56.
unwind_attributes
57.
naked_functions
58.
no_debug
59.
omit_gdb_pretty_printer_section
60.
cfg_target_vendor
61.
stmt_expr_attributes
62.
type_ascription
63.
cfg_target_thread_local
64.
abi_vectorcall
65.
inclusive_range_syntax
66.
exclusive_range_pattern
67.
specialization
68.
pub_restricted
69.
drop_types_in_const
70.
cfg_target_has_atomic
71.
conservative_impl_trait
72.
relaxed_adts
73.
never_type
74.
attr_literals
75.
abi_sysv64
76.
untagged_unions
77.
compiler_builtins
78.
generic_param_attrs
79.
field_init_shorthand
80.
windows_subsystem
81.
link_cfg
82.
use_extern_macros
83.
loop_break_value
84.
target_feature
85.
abi_ptx
86.
i128_type
87.
abi_unadjusted
88.
proc_macro
89.
struct_field_attributes
90.
static_nobundle
91.
abi_msp430_interrupt
92.
sanitizer_runtime
default_type_parameter_fallback
The tracking issue for this feature is:
#27336