M lib/marked.cjs
 M lib/marked.esm.js
 M lib/marked.umd.js
 M marked.min.js
 M src/rules.js
?? test/unit/strong-regression-spec.js

--- diff stat ---
 lib/marked.cjs    | 2 +-
 lib/marked.esm.js | 2 +-
 lib/marked.umd.js | 2 +-
 marked.min.js     | 2 +-
 src/rules.js      | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

--- diff source/generated ---
diff --git a/lib/marked.cjs b/lib/marked.cjs
index dfed1e6..17ac365 100644
--- a/lib/marked.cjs
+++ b/lib/marked.cjs
@@ -1331,7 +1331,7 @@ var inline = {
 }; // list of punctuation marks from CommonMark spec
 // without * and _ to handle the different emphasis markers * and _

-inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]\\\\`^{|}~';
 inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>

 inline.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
diff --git a/lib/marked.esm.js b/lib/marked.esm.js
index 42f4c59..be7793b 100644
--- a/lib/marked.esm.js
+++ b/lib/marked.esm.js
@@ -1262,7 +1262,7 @@ const inline = {

 // list of punctuation marks from CommonMark spec
 // without * and _ to handle the different emphasis markers * and _
-inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]\\\\`^{|}~';
 inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex();

 // sequences em should skip over [title](link), `code`, <html>
diff --git a/lib/marked.umd.js b/lib/marked.umd.js
index d6a75f2..4e58d9a 100644
--- a/lib/marked.umd.js
+++ b/lib/marked.umd.js
@@ -1333,7 +1333,7 @@
   }; // list of punctuation marks from CommonMark spec
   // without * and _ to handle the different emphasis markers * and _

-  inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+  inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]\\\\`^{|}~';
   inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>

   inline.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
diff --git a/marked.min.js b/marked.min.js
index 6a363ec..a48f019 100644
--- a/marked.min.js
+++ b/marked.min.js
@@ -3,4 +3,4 @@
  * Copyright (c) 2011-2022, Christopher Jeffrey. (MIT Licensed)
  * https://github.com/markedjs/marked
  */
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).marked={})}(this,function(r){"use strict";function i(e,t){for(var u=0;u<t.length;u++){var n=t[u];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}function s(e,t){(null==t||t>e.length)&&(t=e.length);for(var u=0,n=new Array(t);u<t;u++)n[u]=e[u];return n}function B(e,t){var u,n="undefined"!=typeof Symbol&&e[Symbol.iterator]||e["@@iterator"];if(n)return(n=n.call(e)).next.bind(n);if(Array.isArray(e)||(n=function(e,t){var u;if(e)return"string"==typeof e?s(e,t):"Map"===(u="Object"===(u=Object.prototype.toString.call(e).slice(8,-1))&&e.constructor?e.constructor.name:u)||"Set"===u?Array.from(e):"Arguments"===u||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(u)?s(e,t):void 0}(e))||t&&e&&"number"==typeof e.length)return n&&(e=n),u=0,function(){return u>=e.length?{done:!0}:{done:!1,value:e[u++]}};throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}function e(){return{async:!1,baseUrl:null,breaks:!1,extensions:null,gfm:!0,headerIds:!0,headerPrefix:"",highlight:null,langPrefix:"language-",mangle:!0,pedantic:!1,renderer:null,sanitize:!1,sanitizer:null,silent:!1,smartypants:!1,tokenizer:null,walkTokens:null,xhtml:!1}}r.defaults=e();function u(e){return t[e]}var n=/[&<>"']/,l=/[&<>"']/g,a=/[<>"']|&(?!#?\w+;)/,o=/[<>"']|&(?!#?\w+;)/g,t={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;"};function D(e,t){if(t){if(n.test(e))return e.replace(l,u)}else if(a.test(e))return e.replace(o,u);return e}var c=/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/gi;function x(e){return e.replace(c,function(e,t){return"colon"===(t=t.toLowerCase())?":":"#"===t.charAt(0)?"x"===t.charAt(1)?String.fromCharCode(parseInt(t.substring(2),16)):String.fromCharCode(+t.substring(1)):""})}var h=/(^|[^\[])\^/g;function p(u,e){u="string"==typeof u?u:u.source,e=e||"";var n={replace:function(e,t){return t=(t=t.source||t).replace(h,"$1"),u=u.replace(e,t),n},getRegex:function(){return new RegExp(u,e)}};return n}var f=/[^\w:]/g,Z=/^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;function g(e,t,u){if(e){try{n=decodeURIComponent(x(u)).replace(f,"").toLowerCase()}catch(e){return null}if(0===n.indexOf("javascript:")||0===n.indexOf("vbscript:")||0===n.indexOf("data:"))return null}var n;t&&!Z.test(u)&&(e=u,F[" "+(n=t)]||(O.test(n)?F[" "+n]=n+"/":F[" "+n]=k(n,"/",!0)),t=-1===(n=F[" "+n]).indexOf(":"),u="//"===e.substring(0,2)?t?e:n.replace(q,"$1")+e:"/"===e.charAt(0)?t?e:n.replace(L,"$1")+e:n+e);try{u=encodeURI(u).replace(/%25/g,"%")}catch(e){return null}return u}var F={},O=/^[^:]+:\/*[^/]*$/,q=/^([^:]+:)[\s\S]*$/,L=/^([^:]+:\/*[^/]*)[\s\S]*$/;var A={exec:function(){}};function d(e){for(var t,u,n=1;n<arguments.length;n++)for(u in t=arguments[n])Object.prototype.hasOwnProperty.call(t,u)&&(e[u]=t[u]);return e}function C(e,t){var u=e.replace(/\|/g,function(e,t,u){for(var n=!1,r=t;0<=--r&&"\\"===u[r];)n=!n;return n?"|":" |"}).split(/ \|/),n=0;if(u[0].trim()||u.shift(),0<u.length&&!u[u.length-1].trim()&&u.pop(),u.length>t)u.splice(t);else for(;u.length<t;)u.push("");for(;n<u.length;n++)u[n]=u[n].trim().replace(/\\\|/g,"|");return u}function k(e,t,u){var n=e.length;if(0===n)return"";for(var r=0;r<n;){var i=e.charAt(n-r-1);if((i!==t||u)&&(i===t||!u))break;r++}return e.slice(0,n-r)}function E(e){e&&e.sanitize&&!e.silent&&console.warn("marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. 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t={type:"html",raw:e[0],pre:!this.options.sanitizer&&("pre"===e[1]||"script"===e[1]||"style"===e[1]),text:e[0]},this.options.sanitize&&(e=this.options.sanitizer?this.options.sanitizer(e[0]):D(e[0]),t.type="paragraph",t.text=e,t.tokens=this.lexer.inline(e)),t},t.def=function(e){e=this.rules.block.def.exec(e);if(e)return e[3]&&(e[3]=e[3].substring(1,e[3].length-1)),{type:"def",tag:e[1].toLowerCase().replace(/\s+/g," "),raw:e[0],href:e[2],title:e[3]}},t.table=function(e){e=this.rules.block.table.exec(e);if(e){var t={type:"table",header:C(e[1]).map(function(e){return{text:e}}),align:e[2].replace(/^ *|\| *$/g,"").split(/ *\| */),rows:e[3]&&e[3].trim()?e[3].replace(/\n[ \t]*$/,"").split("\n"):[]};if(t.header.length===t.align.length){t.raw=e[0];for(var u,n,r,i=t.align.length,s=0;s<i;s++)/^ *-+: *$/.test(t.align[s])?t.align[s]="right":/^ *:-+: *$/.test(t.align[s])?t.align[s]="center":/^ *:-+ 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if(i=r,this.options.extensions&&this.options.extensions.startInline&&!function(){var t=1/0,u=r.slice(1),n=void 0;a.options.extensions.startInline.forEach(function(e){"number"==typeof(n=e.call({lexer:this},u))&&0<=n&&(t=Math.min(t,n))}),t<1/0&&0<=t&&(i=r.substring(0,t+1))}(),u=this.tokenizer.inlineText(i,j))r=r.substring(u.raw.length),"_"!==u.raw.slice(-1)&&(l=u.raw.slice(-1)),s=!0,(e=t[t.length-1])&&"text"===e.type?(e.raw+=u.raw,e.text+=u.text):t.push(u);else if(r){var c="Infinite loop on byte: "+r.charCodeAt(0);if(this.options.silent){console.error(c);break}throw new Error(c)}return t},n=u,t=[{key:"rules",get:function(){return{block:y,inline:v}}}],(e=null)&&i(n.prototype,e),t&&i(n,t),Object.defineProperty(n,"prototype",{writable:!1}),u}(),$=function(){function e(e){this.options=e||r.defaults}var t=e.prototype;return t.code=function(e,t,u){var n,t=(t||"").match(/\S*/)[0];return this.options.highlight&&null!=(n=this.options.highlight(e,t))&&n!==e&&(u=!0,e=n),e=e.replace(/\n$/,"")+"\n",t?'<pre><code class="'+this.options.langPrefix+D(t,!0)+'">'+(u?e:D(e,!0))+"</code></pre>\n":"<pre><code>"+(u?e:D(e,!0))+"</code></pre>\n"},t.blockquote=function(e){return"<blockquote>\n"+e+"</blockquote>\n"},t.html=function(e){return e},t.heading=function(e,t,u,n){return this.options.headerIds?"<h"+t+' id="'+(this.options.headerPrefix+n.slug(u))+'">'+e+"</h"+t+">\n":"<h"+t+">"+e+"</h"+t+">\n"},t.hr=function(){return this.options.xhtml?"<hr/>\n":"<hr>\n"},t.list=function(e,t,u){var n=t?"ol":"ul";return"<"+n+(t&&1!==u?' start="'+u+'"':"")+">\n"+e+"</"+n+">\n"},t.listitem=function(e){return"<li>"+e+"</li>\n"},t.checkbox=function(e){return"<input "+(e?'checked="" ':"")+'disabled="" type="checkbox"'+(this.options.xhtml?" /":"")+"> 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t=e.prototype;return t.strong=function(e){return e},t.em=function(e){return e},t.codespan=function(e){return e},t.del=function(e){return e},t.html=function(e){return e},t.text=function(e){return e},t.link=function(e,t,u){return""+u},t.image=function(e,t,u){return""+u},t.br=function(){return""},e}(),T=function(){function e(){this.seen={}}var t=e.prototype;return t.serialize=function(e){return e.toLowerCase().trim().replace(/<[!\/a-z].*?>/gi,"").replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g,"").replace(/\s/g,"-")},t.getNextSafeSlug=function(e,t){var u=e,n=0;if(this.seen.hasOwnProperty(u))for(n=this.seen[e];u=e+"-"+ ++n,this.seen.hasOwnProperty(u););return t||(this.seen[e]=n,this.seen[u]=0),u},t.slug=function(e,t){void 0===t&&(t={});e=this.serialize(e);return this.getNextSafeSlug(e,t.dryrun)},e}(),R=function(){function u(e){this.options=e||r.defaults,this.options.renderer=this.options.renderer||new 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switch(o.type){case"space":continue;case"hr":d+=this.renderer.hr();continue;case"heading":d+=this.renderer.heading(this.parseInline(o.tokens),o.depth,x(this.parseInline(o.tokens,this.textRenderer)),this.slugger);continue;case"code":d+=this.renderer.code(o.text,o.lang,o.escaped);continue;case"table":for(l=D="",r=o.header.length,u=0;u<r;u++)l+=this.renderer.tablecell(this.parseInline(o.header[u].tokens),{header:!0,align:o.align[u]});for(D+=this.renderer.tablerow(l),a="",r=o.rows.length,u=0;u<r;u++){for(l="",i=(s=o.rows[u]).length,n=0;n<i;n++)l+=this.renderer.tablecell(this.parseInline(s[n].tokens),{header:!1,align:o.align[n]});a+=this.renderer.tablerow(l)}d+=this.renderer.table(D,a);continue;case"blockquote":a=this.parse(o.tokens),d+=this.renderer.blockquote(a);continue;case"list":for(D=o.ordered,E=o.start,c=o.loose,r=o.items.length,a="",u=0;u<r;u++)f=(p=o.items[u]).checked,g=p.task,h="",p.task&&(F=this.renderer.checkbox(f),c?0<p.tokens.length&&"paragraph"===p.tokens[0].type?(p.tokens[0].text=F+" 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u,n,r="",i=e.length,s=0;s<i;s++)if(u=e[s],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[u.type]&&(!1!==(n=this.options.extensions.renderers[u.type].call({parser:this},u))||!["escape","html","link","image","strong","em","codespan","br","del","text"].includes(u.type)))r+=n||"";else switch(u.type){case"escape":r+=t.text(u.text);break;case"html":r+=t.html(u.text);break;case"link":r+=t.link(u.href,u.title,this.parseInline(u.tokens,t));break;case"image":r+=t.image(u.href,u.title,u.text);break;case"strong":r+=t.strong(this.parseInline(u.tokens,t));break;case"em":r+=t.em(this.parseInline(u.tokens,t));break;case"codespan":r+=t.codespan(u.text);break;case"br":r+=t.br();break;case"del":r+=t.del(this.parseInline(u.tokens,t));break;case"text":r+=t.text(u.text);break;default:var l='Token with "'+u.type+'" type was not found.';if(this.options.silent)return void console.error(l);throw new Error(l)}return r},u}();function I(e,u,n){if(null==e)throw new 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Promise.all(I.walkTokens(a,u.walkTokens)).then(function(){return R.parse(a,u)}).catch(t);I.walkTokens(a,u.walkTokens)}return R.parse(a,u)}catch(e){t(e)}}I.options=I.setOptions=function(e){return d(I.defaults,e),e=I.defaults,r.defaults=e,I},I.getDefaults=e,I.defaults=r.defaults,I.use=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n,r=d.apply(void 0,[{}].concat(t)),o=I.defaults.extensions||{renderers:{},childTokens:{}};t.forEach(function(s){if(s.extensions&&(n=!0,s.extensions.forEach(function(r){if(!r.name)throw new Error("extension name required");var i;if(r.renderer&&(i=o.renderers?o.renderers[r.name]:null,o.renderers[r.name]=i?function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=r.renderer.apply(this,t);return n=!1===n?i.apply(this,t):n}:r.renderer),r.tokenizer){if(!r.level||"block"!==r.level&&"inline"!==r.level)throw new Error("extension level must be 'block' or 'inline'");o[r.level]?o[r.level].unshift(r.tokenizer):o[r.level]=[r.tokenizer],r.start&&("block"===r.level?o.startBlock?o.startBlock.push(r.start):o.startBlock=[r.start]:"inline"===r.level&&(o.startInline?o.startInline.push(r.start):o.startInline=[r.start]))}r.childTokens&&(o.childTokens[r.name]=r.childTokens)})),s.renderer){var e,l=I.defaults.renderer||new $;for(e in s.renderer)!function(r){var i=l[r];l[r]=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=s.renderer[r].apply(l,t);return n=!1===n?i.apply(l,t):n}}(e);r.renderer=l}if(s.tokenizer){var t,a=I.defaults.tokenizer||new w;for(t in s.tokenizer)!function(r){var i=a[r];a[r]=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=s.tokenizer[r].apply(a,t);return n=!1===n?i.apply(a,t):n}}(t);r.tokenizer=a}var u;s.walkTokens&&(u=I.defaults.walkTokens,r.walkTokens=function(e){var t=[];return t.push(s.walkTokens.call(this,e)),t=u?t.concat(u.call(this,e)):t}),n&&(r.extensions=o),I.setOptions(r)})},I.walkTokens=function(e,l){for(var a,o=[],t=B(e);!(a=t()).done;)!function(){var t=a.value;switch(o=o.concat(l.call(I,t)),t.type){case"table":for(var e=B(t.header);!(u=e()).done;){var u=u.value;o=o.concat(I.walkTokens(u.tokens,l))}for(var n,r=B(t.rows);!(n=r()).done;)for(var i=B(n.value);!(s=i()).done;){var s=s.value;o=o.concat(I.walkTokens(s.tokens,l))}break;case"list":o=o.concat(I.walkTokens(t.items,l));break;default:I.defaults.extensions&&I.defaults.extensions.childTokens&&I.defaults.extensions.childTokens[t.type]?I.defaults.extensions.childTokens[t.type].forEach(function(e){o=o.concat(I.walkTokens(t[e],l))}):t.tokens&&(o=o.concat(I.walkTokens(t.tokens,l)))}}();return o},I.parseInline=function(e,t){if(null==e)throw new Error("marked.parseInline(): input parameter is undefined or null");if("string"!=typeof e)throw new Error("marked.parseInline(): input parameter is of type 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\ No newline at end of file
diff --git a/src/rules.js b/src/rules.js
index 25d1415..0386f4d 100644
--- a/src/rules.js
+++ b/src/rules.js
@@ -181,7 +181,7 @@ export const inline = {

 // list of punctuation marks from CommonMark spec
 // without * and _ to handle the different emphasis markers * and _
-inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]\\\\`^{|}~';
 inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex();

 // sequences em should skip over [title](link), `code`, <html>

--- new test file ---
     1  import { marked } from '../../src/marked.js';
     2
     3  describe('strong emphasis regressions', () => {
     4    it('parses strong text ending with an escaped opening bracket followed by an escaped closing bracket', () => {
     5      expect(marked('**strong text\\[**\\]')).toBe('<p><strong>strong text[</strong>]</p>\n');
     6    });
     7
     8    it('parses strong text with escaped bracket punctuation in surrounding text', () => {
     9      expect(marked('before **strong text\\[**\\] after')).toBe('<p>before <strong>strong text[</strong>] after</p>\n');
    10    });
    11
    12    it('parses underscore strong text before escaped closing bracket punctuation', () => {
    13      expect(marked('__strong text\\[__\\]')).toBe('<p><strong>strong text[</strong>]</p>\n');
    14    });
    15
    16    it('parses strong text ending before other escaped bracket punctuation', () => {
    17      expect(marked('**strong text\\]**\\[')).toBe('<p><strong>strong text]</strong>[</p>\n');
    18    });
    19
    20    it('parses underscore strong text ending before other escaped bracket punctuation', () => {
    21      expect(marked('__strong text\\]__\\[')).toBe('<p><strong>strong text]</strong>[</p>\n');
    22    });
    23
    24    it('parses emphasis text before escaped bracket punctuation', () => {
    25      expect(marked('*em text\\[*\\]')).toBe('<p><em>em text[</em>]</p>\n');
    26    });
    27  });

--- base stat incl tracked ---
 lib/marked.cjs    | 2 +-
 lib/marked.esm.js | 2 +-
 lib/marked.umd.js | 2 +-
 marked.min.js     | 2 +-
 src/rules.js      | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)
[The command completed with exit code 0.]
[Current working directory: /workspace/marked]
[Python interpreter: /usr/bin/python]
[Command finished with exit code 0]