panic: internal error: entered unreachable code (at components/script/dom/range.rs:1142) #40719
Description
Minimal testcase:
<!DOCTYPE html>
<script>
let pi =
document.createProcessingInstruction("xml-stylesheet",
'href="mycss.css" type="text/css"');
let range = document.createRange();
range.setEnd(pi, 0)
range.createContextualFragment("<div>A</div>");
</script>System: Linux
Version: Version: Servo 0.0.2-cc4c762a7
Command: ./servo/servo
internal error: entered unreachable code (thread Script(1,1), at components/script/dom/range.rs:1142)
0: servoshell::backtrace::print
1: servoshell::panic_hook::panic_hook
2: std::panicking::panic_with_hook
3: std::panicking::panic_handler::{{closure}}
4: std::sys::backtrace::__rust_end_short_backtrace
5: __rustc::rust_begin_unwind
6: core::panicking::panic_fmt
7: core::panicking::panic
8: script_bindings::codegen::GenericBindings::RangeBinding::Range_Binding::createContextualFragment::{{closure}}
9: mozjs::panic::wrap_panic
10: script_bindings::codegen::GenericBindings::RangeBinding::Range_Binding::createContextualFragment
11: CallJitMethodOp
12: script_bindings::utils::generic_call
13: script_bindings::utils::generic_method
14: _ZN2js23InternalCallOrConstructEP9JSContextRKN2JS8CallArgsENS_14MaybeConstructENS_10CallReasonE
15: _ZN2js9InterpretEP9JSContextRNS_8RunStateE
16: _ZN2js9RunScriptEP9JSContextRNS_8RunStateE
17: _ZN2js7ExecuteEP9JSContextN2JS6HandleIP8JSScriptEENS3_IP8JSObjectEENS2_13MutableHandleINS2_5ValueEEE
18: _Z16JS_ExecuteScriptP9JSContextN2JS6HandleIP8JSScriptEENS1_13MutableHandleINS1_5ValueEEE
19: script::dom::globalscope::GlobalScope::evaluate_script_on_global_with_result
20: script::dom::globalscope::GlobalScope::run_a_classic_script
21: script::dom::html::htmlscriptelement::HTMLScriptElement::execute
22: script::dom::html::htmlscriptelement::HTMLScriptElement::prepare
23: script::dom::servoparser::ServoParser::parse_sync
24: script::dom::servoparser::ServoParser::parse_bytes_chunk
25: script::dom::servoparser::ParserContext::load_document
26: <script::dom::servoparser::ParserContext as script::network_listener::FetchResponseListener>::process_response_eof
27: script::script_thread::ScriptThread::handle_msg_from_script
28: script::script_thread::ScriptThread::handle_msgs::{{closure}}
29: script::script_thread::ScriptThread::handle_msgs
30: std::sys::backtrace::__rust_begin_short_backtrace
31: core::ops::function::FnOnce::call_once{{vtable.shim}}
32: std::sys::thread::unix::Thread::new::thread_start
33: start_thread
at ./nptl/pthread_create.c:447:8
34: clone3
at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78:0