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InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098

Closed
#1097
Closed
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
#1097
Labels
P2Medium: important but non-blocking improvementbugSomething is not working

Description

@filintod
filintod
opened on Jul 30, 2026

Describe the bug
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState

To Reproduce
Steps to reproduce the behavior:
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:

 ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.

Expected behavior
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.

Logs
If applicable, add logs to help explain your problem.

Additional context
Add any other context about the problem here.

Metadata

Metadata

Assignees

No one assigned

    Labels

    P2Medium: important but non-blocking improvementbugSomething is not working

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

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btn.onmouseout = function() { this.style.opacity = '0.7'; };
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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
      Skip to content
      InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
      Closed
      #1097
      Closed
      InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
      #1097
      Labels
      P2Medium: important but non-blocking improvementbugSomething is not working
      Description
      @filintod
      filintod
      opened on Jul 30, 2026
      Describe the bug
      
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
      To Reproduce
      
Steps to reproduce the behavior:
      
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
       ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

      Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
      Expected behavior
      
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
      Logs
      
If applicable, add logs to help explain your problem.
      Additional context
      
Add any other context about the problem here.
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        P2Medium: important but non-blocking improvementbugSomething is not working
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
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style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
          Skip to content
          InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
          Closed
          #1097
          Closed
          InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
          #1097
          Labels
          P2Medium: important but non-blocking improvementbugSomething is not working
          Description
          @filintod
          filintod
          opened on Jul 30, 2026
          Describe the bug
          
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
          To Reproduce
          
Steps to reproduce the behavior:
          
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
           ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

          Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
          Expected behavior
          
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
          Logs
          
If applicable, add logs to help explain your problem.
          Additional context
          
Add any other context about the problem here.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            P2Medium: important but non-blocking improvementbugSomething is not working
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
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var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
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}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
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found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
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frag.appendChild(document.createTextNode(part));
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span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
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node.parentNode.replaceChild(frag, node);
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var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
              Skip to content
              InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
              Closed
              #1097
              Closed
              InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
              #1097
              Labels
              P2Medium: important but non-blocking improvementbugSomething is not working
              Description
              @filintod
              filintod
              opened on Jul 30, 2026
              Describe the bug
              
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
              To Reproduce
              
Steps to reproduce the behavior:
              
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
               ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

              Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
              Expected behavior
              
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
              Logs
              
If applicable, add logs to help explain your problem.
              Additional context
              
Add any other context about the problem here.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                P2Medium: important but non-blocking improvementbugSomething is not working
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
                  Skip to content
                  InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
                  Closed
                  #1097
                  Closed
                  InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
                  #1097
                  Labels
                  P2Medium: important but non-blocking improvementbugSomething is not working
                  Description
                  @filintod
                  filintod
                  opened on Jul 30, 2026
                  Describe the bug
                  
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
                  To Reproduce
                  
Steps to reproduce the behavior:
                  
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
                   ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

                  Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
                  Expected behavior
                  
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
                  Logs
                  
If applicable, add logs to help explain your problem.
                  Additional context
                  
Add any other context about the problem here.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    P2Medium: important but non-blocking improvementbugSomething is not working
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
                      Skip to content
                      InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
                      Closed
                      #1097
                      Closed
                      InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
                      #1097
                      Labels
                      P2Medium: important but non-blocking improvementbugSomething is not working
                      Description
                      @filintod
                      filintod
                      opened on Jul 30, 2026
                      Describe the bug
                      
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
                      To Reproduce
                      
Steps to reproduce the behavior:
                      
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
                       ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

                      Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
                      Expected behavior
                      
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
                      Logs
                      
If applicable, add logs to help explain your problem.
                      Additional context
                      
Add any other context about the problem here.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        P2Medium: important but non-blocking improvementbugSomething is not working
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
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var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
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} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
                          Skip to content
                          InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
                          Closed
                          #1097
                          Closed
                          InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
                          #1097
                          Labels
                          P2Medium: important but non-blocking improvementbugSomething is not working
                          Description
                          @filintod
                          filintod
                          opened on Jul 30, 2026
                          Describe the bug
                          
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
                          To Reproduce
                          
Steps to reproduce the behavior:
                          
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
                           ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

                          Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
                          Expected behavior
                          
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
                          Logs
                          
If applicable, add logs to help explain your problem.
                          Additional context
                          
Add any other context about the problem here.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            P2Medium: important but non-blocking improvementbugSomething is not working
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 · Issue #1098 · modelcontextprotocol/rust-sdk · GitHub
                              Skip to content
                              InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322 #1098
                              Closed
                              #1097
                              Closed
                              InputRequiredResult metadata causes input and resume state to be dropped - mrtr requests sep 2322#1098
                              #1097
                              Labels
                              P2Medium: important but non-blocking improvementbugSomething is not working
                              Description
                              @filintod
                              filintod
                              opened on Jul 30, 2026
                              Describe the bug
                              
While testing the conformance suite we found issues with some of the mrtr tests with missing inputRequests and requestState
                              To Reproduce
                              
Steps to reproduce the behavior:
                              
Deserialize this valid server result through ServerResult / ServerJsonRpcMessage:
                               ```json
{
"resultType": "input_required",
"_meta": {},
"inputRequests": {
"confirm": {
"method": "elicitation/create",
"params": {
"mode": "form",
"message": "Please confirm",
"requestedSchema": {
"type": "object",
"properties": {
"ok": { "type": "boolean" }
},
"required": ["ok"]
}
}
}
},
"requestState": "opaque-server-state"
}

                              Observe that it is parsed as ServerResult::CallToolResult, rather than ServerResult::InputRequiredResult.
                              Expected behavior
                              
A result with resultType: "input_required" should always deserialize as ServerResult::InputRequiredResult, preserving both inputRequests and requestState for the client retry.
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                                P2Medium: important but non-blocking improvementbugSomething is not working
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