Always getting Duplicate parameter name "_". Can not disable es5Strict check / warning.

[DanielRuf]

java -jar compiler.jar --jscomp_warning=es5Strict --language_in=ECMASCRIPT5 --language_out=ECMASCRIPT5 -O=WHITESPACE_ONLY --js_output_file=1549035730_99ceadf4011cf132f381b55c6b2c28df.js.min 1549035730_99ceadf4011cf132f381b55c6b2c28df.js
1549035730_99ceadf4011cf132f381b55c6b2c28df.js:744: ERROR - Parse error. Duplicate parameter name "_"
$.subscribe('plugin/swAddArticle/onAddArticle',cartRefresh);$.subscribe('plugin/swCollapseCart/onRemoveArticleFinished',cartRefresh);});})(jQuery,window);;(function($,window){'use strict';$.plugin('swInvalidTosJump',{defaults:{jumpLabelSelector:'label[for="sAGB"]',errorClass:'has--error'},init:function(){var me=this;me.$jumpLabel=$(me.opts.jumpLabelSelector);me._on(me.$el,'invalid',$.proxy(me.jumpToInvalid,me));},jumpToInvalid:function(){var me=this;window.scroll(0,me.$el.offset().top-(window.innerHeight/2));me.$jumpLabel.addClass(me.opts.errorClass);}});})(jQuery,window);$.subscribe('plugin/swLastSeenProducts/onCreateProductImage',function(_,_,element,data){if(data.images[0].sourceSetWebP){var imageElement=element.find('.image--element');var content=imageElement.find('.image--media').html();var webPTag='<source srcset="'+data.images[0].sourceSetWebP+'" data-srcset="'+data.images[0].sourceSetWebP+'" type="image/webp">';content='<picture>'+webPTag+content+'</picture>';imageElement.html(content);}});;(function($,window){'use strict';var $body=$('body'),$html=$('html'),isTouchIE=$html.hasClass('is--ie-touch');$.plugin('advancedMenu',{defaults:{'listSelector':'.navigation--list.container','navigationItemSelector':'.navigation--entry:not(.is--home)','navigationLinkSelector':'.navigation--link','closeButtonSelector':'.button--close','menuContainerSelector':'.menu--container','menuActiveClass':'menu--is-active','itemHoverClass':'is--hovered','hoverDelay':0},init:function(){var me=this;me.applyDataAttributes();me._$list=$(me.opts.listSelector);if(!me._$list.length){return;}
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1 error(s), 0 warning(s)

[blickly]

I thought that we required code to be "use strict" compatible, but that doesn't appear to be the case according to https://github.com/google/closure-compiler/wiki/Compiler-Assumptions

Created internal issue b/123959375