displaying errors causes problems for media

If you try to insert media into a post with display_errors = on wordpress fails to work as expected.

admin-ajax.php displays a bunch of errors before the json which causes media library not to show. This is the output for my app when wordpress makes the ajax request to admin-ajax.php

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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
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<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
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<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
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<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
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<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
<br />
<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
<br />
<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
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<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
<br />
<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
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2014","nonces":{"update":"2baeb0b830","delete":"c4e2143c16"},"editLink":"https:\/\/trade-to-travel.appspot.com\/wp-admin\/post.php?post=158&action=edit","compat":{"item":"","meta":""}},{"id":85,"title":"pool_M_2017_106910","filename":"pool_M_2017_106910.jpg","url":"https:\/\/storage.googleapis.com\/tradetotravel\/pool_M_2017_106910.jpg","link":"http:\/\/trade-to-travel.appspot.com\/properties\/downtown-condo\/pool_m_2017_106910\/","alt":"","author":"2","description":"","caption":"","name":"pool_m_2017_106910","status":"inherit","uploadedTo":66,"date":1391114408000,"modified":1391114408000,"menuOrder":0,"mime":"image\/jpeg","type":"image","subtype":"jpeg","icon":null,"dateFormatted":"January 30, 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del Cabo, Mexico","filename":"cabo.jpg","url":"https:\/\/storage.googleapis.com\/tradetotravel\/cabo.jpg","link":"http:\/\/trade-to-travel.appspot.com\/?attachment_id=37","alt":"","author":"1","description":"","caption":"San Jose del Cabo, Mexico","name":"cabo","status":"inherit","uploadedTo":0,"date":1384463533000,"modified":1384463533000,"menuOrder":0,"mime":"image\/jpeg","type":"image","subtype":"jpeg","icon":null,"dateFormatted":"November 14, 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Costa Rica","filename":"CasaBig7.jpg","url":"https:\/\/storage.googleapis.com\/tradetotravel\/CasaBig7.jpg","link":"http:\/\/trade-to-travel.appspot.com\/?attachment_id=36","alt":"","author":"1","description":"","caption":"Casa la Big Sur, Costa Rica","name":"casabig7","status":"inherit","uploadedTo":0,"date":1384198175000,"modified":1384198175000,"menuOrder":0,"mime":"image\/jpeg","type":"image","subtype":"jpeg","icon":null,"dateFormatted":"November 11, 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7, 2013","nonces":{"update":"ee3c43f941","delete":"ffa915c67a"},"editLink":"https:\/\/trade-to-travel.appspot.com\/wp-admin\/post.php?post=4&action=edit","sizes":{"thumbnail":{"height":false,"width":false,"url":"http:\/\/lh5.ggpht.com\/QALm8Ggc98dS25hlRI7ngyJxrYdrUxOD2upSqYetcLyc-9-jsePcpMOSWKStR5MFenJkFm_xrrZyuT_ZYuX7450wKONmmg=s150-c","orientation":"landscape"},"medium":{"height":false,"width":false,"url":"http:\/\/lh5.ggpht.com\/QALm8Ggc98dS25hlRI7ngyJxrYdrUxOD2upSqYetcLyc-9-jsePcpMOSWKStR5MFenJkFm_xrrZyuT_ZYuX7450wKONmmg=s300","orientation":"landscape"},"large":{"height":false,"width":false,"url":"http:\/\/lh5.ggpht.com\/QALm8Ggc98dS25hlRI7ngyJxrYdrUxOD2upSqYetcLyc-9-jsePcpMOSWKStR5MFenJkFm_xrrZyuT_ZYuX7450wKONmmg=s1024","orientation":"landscape"},"full":{"url":"https:\/\/storage.googleapis.com\/tradetotravel\/me3.jpeg","height":960,"width":960,"orientation":"landscape"}},"height":960,"width":960,"orientation":"landscape","compat":{"item":"","meta":""}}]}

Uploading a new image via the same interface has a similar problem. When the upload posts to /_ah/upload it returns errors before the json as well.

<br />
<b>Warning</b>:  array_keys() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>4463</b><br />
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<b>Warning</b>:  asort() expects parameter 1 to be array, null given in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2220</b><br />
<br />
<b>Warning</b>:  Invalid argument supplied for foreach() in <b>/base/data/home/apps/s~trade-to-travel/1.373619958606583670/wordpress/wp-includes/post.php</b> on line <b>2221</b><br />
{"success":true,"data":{"id":201,"title":"me","filename":"me.jpg","url":"https:\/\/storage.googleapis.com\/tradetotravel\/me.jpg","link":"http:\/\/trade-to-travel.appspot.com\/hello-world\/me\/","alt":"","author":"1","description":"","caption":"","name":"me","status":"inherit","uploadedTo":1,"date":1391843269000,"modified":1391843269000,"menuOrder":0,"mime":"image\/jpeg","type":"image","subtype":"jpeg","icon":null,"dateFormatted":"February 8, 2014","nonces":{"update":"d5db6af69e","delete":"40f5d9785c"},"editLink":"https:\/\/trade-to-travel.appspot.com\/wp-admin\/post.php?post=201&action=edit","sizes":{"thumbnail":{"height":false,"width":false,"url":"http:\/\/lh6.ggpht.com\/u62T1Fgxd0RTEjlVVxclx6TD6MEomulhDFj2xiy2E2oOTOpAIGFkUY7BwEy99ilrc_luPLcLmeo-Ss_yaISbqy8fHcI=s150-c","orientation":"landscape"},"medium":{"height":false,"width":false,"url":"http:\/\/lh6.ggpht.com\/u62T1Fgxd0RTEjlVVxclx6TD6MEomulhDFj2xiy2E2oOTOpAIGFkUY7BwEy99ilrc_luPLcLmeo-Ss_yaISbqy8fHcI=s300","orientation":"landscape"},"large":{"height":false,"width":false,"url":"http:\/\/lh6.ggpht.com\/u62T1Fgxd0RTEjlVVxclx6TD6MEomulhDFj2xiy2E2oOTOpAIGFkUY7BwEy99ilrc_luPLcLmeo-Ss_yaISbqy8fHcI=s1024","orientation":"landscape"},"full":{"url":"https:\/\/storage.googleapis.com\/tradetotravel\/me.jpg","height":527,"width":600,"orientation":"landscape"}},"height":527,"width":600,"orientation":"landscape","compat":{"item":"","meta":""}}}

https://wordpress.org/plugins/google-app-engine/