Panic when showing clap's API

[epage]

thread 'rustc' panicked at 'assertion failed: `(left == right)`
...
0: rust_begin_unwind                            
             at /rustc/e6b883c74f49f32cb5d1cbad3457f2b8805a4a38/library/std/src/panicking.rs:498:5
1: core::panicking::panic_fmt
             at /rustc/e6b883c74f49f32cb5d1cbad3457f2b8805a4a38/library/core/src/panicking.rs:107:14
2: core::panicking::assert_failed_inner
3: core::panicking::assert_failed::<rustdoc_json_types::Item, rustdoc_json_types::Item>                                                                                                                                                      
4: <rustdoc::json::JsonRenderer as rustdoc::formats::renderer::FormatRenderer>::item                                                                                                                                                         
5: <rustdoc::json::JsonRenderer as rustdoc::formats::renderer::FormatRenderer>::item                                                                                                                                                         
6: rustdoc::formats::renderer::run_format::<rustdoc::json::JsonRenderer>                                                                                                                                                                     
7: rustdoc::run_renderer::<rustdoc::json::JsonRenderer>                                                                                                                                                                                      
8: <rustc_session::session::Session>::time::<core::result::Result<(), rustc_errors::ErrorReported>, rustdoc::main_options::{closure#0}::{closure#0}::{closure#0}::{closure#2}>                                                               
9: <rustc_interface::passes::QueryContext>::enter::<rustdoc::main_options::{closure#0}::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>                                                                    
10: <rustc_interface::interface::Compiler>::enter::<rustdoc::main_options::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>                                                                                  
11: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorReported>, rustdoc::main_options::{closure#0}>::{closure#1}>                                                                                                                                                                                                                                     
12: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustdoc::main_options::{closure#0}>                                                                                         
13: rustdoc::main_options                                                                                                                                                                                                                  
14: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustdoc::main_args::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure
#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>

See

• ICE with rustdoc json backend  rust-lang/rust#89097
• [rustdoc-json] Assertion error on blanket impls rust-lang/rust#83718