Add type hint to prevent error

[kaptk2]

Fixes #213

[joelclermont]

This did not fix the issue for me. I traced the ErrorException to the presence of nesbot/carbon:^3.0 instead of nesbot/carbon:^2.0. Once I downgraded, the error went away.

If it helps, here's more info:

With carbon 2 installed, the $diff object near where the error is thrown is

DateInterval {#3796
  interval: - 1m 4d
  +"y": 0
  +"m": 1
  +"d": 4
  +"h": 0
  +"i": 0
  +"s": 0
  +"f": 0.0
  +"invert": 1
  +"days": 35
  +"from_string": false
}

With Carbon 3 installed, it's

Carbon\CarbonInterval�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/CarbonInterval.php#L194�\^�]8;;�\ {#4244
  interval: - 1m 4d
  #timezoneSetting: null
  #originalInput: DateInterval {#3868
    interval: - 1m 4d
    +"y": 0
    +"m": 1
    +"d": 4
    +"h": 0
    +"i": 0
    +"s": 0
    +"f": 0.0
    +"invert": 1
    +"days": 35
    +"from_string": false
  }
  #startDate: Illuminate\Support\Carbon @1580950800�]8;;file:///app/vendor/laravel/framework/src/Illuminate/Support/Carbon.php#L12�\^�]8;;�\ {#3999
    #endOfTime: false
    #startOfTime: false
    #constructedObjectId: "0000000000000f9f0000000000000000"
    -clock: null
    #localMonthsOverflow: null
    #localYearsOverflow: null
    #localStrictModeEnabled: null
    #localHumanDiffOptions: null
    #localToStringFormat: null
    #localSerializer: null
    #localMacros: null
    #localGenericMacros: null
    #localFormatFunction: null
    #localTranslator: null
    #dumpProperties: array:3 [
      0 => "date"
      1 => "timezone_type"
      2 => "timezone"
    ]
    #dumpLocale: null
    #dumpDateProperties: null
    date: 2020-02-05 19:00:00.0 America/Chicago (-06:00)
  }
  #endDate: Illuminate\Support\Carbon @1577926800�]8;;file:///app/vendor/laravel/framework/src/Illuminate/Support/Carbon.php#L12�\^�]8;;�\ {#4247
    #endOfTime: false
    #startOfTime: false
    #constructedObjectId: "00000000000010970000000000000000"
    -clock: null
    #localMonthsOverflow: null
    #localYearsOverflow: null
    #localStrictModeEnabled: null
    #localHumanDiffOptions: null
    #localToStringFormat: null
    #localSerializer: null
    #localMacros: null
    #localGenericMacros: null
    #localFormatFunction: null
    #localTranslator: null
    #dumpProperties: array:3 [
      0 => "date"
      1 => "timezone_type"
      2 => "timezone"
    ]
    #dumpLocale: null
    #dumpDateProperties: null
    date: 2020-01-01 19:00:00.0 America/Chicago (-06:00)
  }
  #rawInterval: DateInterval {#3868}
  #initialValues: array:9 [
    0 => 0
    1 => 1
    2 => 4
    3 => 0
    4 => 0
    5 => 0
    6 => 0.0
    7 => 1
    8 => false
  ]
  -clock: null
  #step: null
  #localMonthsOverflow: null
  #localYearsOverflow: null
  #localStrictModeEnabled: null
  #localHumanDiffOptions: null
  #localToStringFormat: null
  #localSerializer: null
  #localMacros: null
  #localGenericMacros: null
  #localFormatFunction: null
  #localTranslator: Carbon\Translator�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Translator.php#L31�\^�]8;;�\ {#1589
    #catalogues: array:1 [
      "en" => Symfony\Component\Translation\MessageCatalogue�]8;;file:///app/vendor/symfony/translation/MessageCatalogue.php#L20�\^�]8;;�\ {#3786
        -messages: array:1 [
          "messages" => array:97 [
            "year" => "{1}:count year|{0}:count years|]1,Inf[:count years"
            "a_year" => "{1}a year|{0}:count years|]1,Inf[:count years"
            "y" => "{1}:countyr|{0}:countyrs|]1,Inf[:countyrs"
            "month" => "{1}:count month|{0}:count months|]1,Inf[:count months"
            "a_month" => "{1}a month|{0}:count months|]1,Inf[:count months"
            "m" => "{1}:countmo|{0}:countmos|]1,Inf[:countmos"
            "week" => "{1}:count week|{0}:count weeks|]1,Inf[:count weeks"
            "a_week" => "{1}a week|{0}:count weeks|]1,Inf[:count weeks"
            "w" => ":countw"
            "day" => "{1}:count day|{0}:count days|]1,Inf[:count days"
            "a_day" => "{1}a day|{0}:count days|]1,Inf[:count days"
            "d" => ":countd"
            "hour" => "{1}:count hour|{0}:count hours|]1,Inf[:count hours"
            "a_hour" => "{1}an hour|{0}:count hours|]1,Inf[:count hours"
            "h" => ":counth"
            "minute" => "{1}:count minute|{0}:count minutes|]1,Inf[:count minutes"
            "a_minute" => "{1}a minute|{0}:count minutes|]1,Inf[:count minutes"
            "min" => ":countm"
            "second" => "{1}:count second|{0}:count seconds|]1,Inf[:count seconds"
            "a_second" => "{1}a few seconds|{0}:count seconds|]1,Inf[:count seconds"
            "s" => ":counts"
            "millisecond" => "{1}:count millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
            "a_millisecond" => "{1}a millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
            "ms" => ":countms"
            "microsecond" => "{1}:count microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
            "a_microsecond" => "{1}a microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
            "µs" => ":countµs"
            "ago" => ":time ago"
            "from_now" => ":time from now"
            "after" => ":time after"
            "before" => ":time before"
            "diff_now" => "just now"
            "diff_today" => "today"
            "diff_yesterday" => "yesterday"
            "diff_tomorrow" => "tomorrow"
            "diff_before_yesterday" => "before yesterday"
            "diff_after_tomorrow" => "after tomorrow"
            "period_recurrences" => "{1}once|{0}:count times|]1,Inf[:count times"
            "period_interval" => "every :interval"
            "period_start_date" => "from :date"
            "period_end_date" => "to :date"
            "months.0" => "January"
            "months.1" => "February"
            "months.2" => "March"
            "months.3" => "April"
            "months.4" => "May"
            "months.5" => "June"
            "months.6" => "July"
            "months.7" => "August"
            "months.8" => "September"
            "months.9" => "October"
            "months.10" => "November"
            "months.11" => "December"
            "months_short.0" => "Jan"
            "months_short.1" => "Feb"
            "months_short.2" => "Mar"
            "months_short.3" => "Apr"
            "months_short.4" => "May"
            "months_short.5" => "Jun"
            "months_short.6" => "Jul"
            "months_short.7" => "Aug"
            "months_short.8" => "Sep"
            "months_short.9" => "Oct"
            "months_short.10" => "Nov"
            "months_short.11" => "Dec"
            "weekdays.0" => "Sunday"
            "weekdays.1" => "Monday"
            "weekdays.2" => "Tuesday"
            "weekdays.3" => "Wednesday"
            "weekdays.4" => "Thursday"
            "weekdays.5" => "Friday"
            "weekdays.6" => "Saturday"
            "weekdays_short.0" => "Sun"
            "weekdays_short.1" => "Mon"
            "weekdays_short.2" => "Tue"
            "weekdays_short.3" => "Wed"
            "weekdays_short.4" => "Thu"
            "weekdays_short.5" => "Fri"
            "weekdays_short.6" => "Sat"
            "weekdays_min.0" => "Su"
            "weekdays_min.1" => "Mo"
            "weekdays_min.2" => "Tu"
            "weekdays_min.3" => "We"
            "weekdays_min.4" => "Th"
            "weekdays_min.5" => "Fr"
            "weekdays_min.6" => "Sa"
            "ordinal" => Closure($number)�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Lang/en.php#L71�\^�]8;;�\ {#1597
              class: "�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Translator.php#L31�\Carbon\Translator�]8;;�\"
            }
            "formats.LT" => "h:mm A"
            "formats.LTS" => "h:mm:ss A"
            "formats.L" => "MM/DD/YYYY"
            "formats.LL" => "MMMM D, YYYY"
            "formats.LLL" => "MMMM D, YYYY h:mm A"
            "formats.LLLL" => "dddd, MMMM D, YYYY h:mm A"
            "list.0" => ", "
            "list.1" => " and "
            "first_day_of_week" => 1
            "day_of_first_week_of_year" => 1
          ]
        ]
        -metadata: []
        -catalogueMetadata: []
        -resources: []
        -locale: "en"
        -fallbackCatalogue: null
        -parent: null
      }
    ]
    -locale: "en"
    -fallbackLocales: []
    -loaders: array:1 [
      "array" => Symfony\Component\Translation\Loader\ArrayLoader�]8;;file:///app/vendor/symfony/translation/Loader/ArrayLoader.php#L21�\^�]8;;�\ {#1588}
    ]
    -resources: array:1 [
      "en" => array:1 [
        0 => array:3 [
          0 => "array"
          1 => array:51 [
            "year" => "{1}:count year|{0}:count years|]1,Inf[:count years"
            "a_year" => "{1}a year|{0}:count years|]1,Inf[:count years"
            "y" => "{1}:countyr|{0}:countyrs|]1,Inf[:countyrs"
            "month" => "{1}:count month|{0}:count months|]1,Inf[:count months"
            "a_month" => "{1}a month|{0}:count months|]1,Inf[:count months"
            "m" => "{1}:countmo|{0}:countmos|]1,Inf[:countmos"
            "week" => "{1}:count week|{0}:count weeks|]1,Inf[:count weeks"
            "a_week" => "{1}a week|{0}:count weeks|]1,Inf[:count weeks"
            "w" => ":countw"
            "day" => "{1}:count day|{0}:count days|]1,Inf[:count days"
            "a_day" => "{1}a day|{0}:count days|]1,Inf[:count days"
            "d" => ":countd"
            "hour" => "{1}:count hour|{0}:count hours|]1,Inf[:count hours"
            "a_hour" => "{1}an hour|{0}:count hours|]1,Inf[:count hours"
            "h" => ":counth"
            "minute" => "{1}:count minute|{0}:count minutes|]1,Inf[:count minutes"
            "a_minute" => "{1}a minute|{0}:count minutes|]1,Inf[:count minutes"
            "min" => ":countm"
            "second" => "{1}:count second|{0}:count seconds|]1,Inf[:count seconds"
            "a_second" => "{1}a few seconds|{0}:count seconds|]1,Inf[:count seconds"
            "s" => ":counts"
            "millisecond" => "{1}:count millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
            "a_millisecond" => "{1}a millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
            "ms" => ":countms"
            "microsecond" => "{1}:count microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
            "a_microsecond" => "{1}a microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
            "µs" => ":countµs"
            "ago" => ":time ago"
            "from_now" => ":time from now"
            "after" => ":time after"
            "before" => ":time before"
            "diff_now" => "just now"
            "diff_today" => "today"
            "diff_yesterday" => "yesterday"
            "diff_tomorrow" => "tomorrow"
            "diff_before_yesterday" => "before yesterday"
            "diff_after_tomorrow" => "after tomorrow"
            "period_recurrences" => "{1}once|{0}:count times|]1,Inf[:count times"
            "period_interval" => "every :interval"
            "period_start_date" => "from :date"
            "period_end_date" => "to :date"
            "months" => array:12 [
              0 => "January"
              1 => "February"
              2 => "March"
              3 => "April"
              4 => "May"
              5 => "June"
              6 => "July"
              7 => "August"
              8 => "September"
              9 => "October"
              10 => "November"
              11 => "December"
            ]
            "months_short" => array:12 [
              0 => "Jan"
              1 => "Feb"
              2 => "Mar"
              3 => "Apr"
              4 => "May"
              5 => "Jun"
              6 => "Jul"
              7 => "Aug"
              8 => "Sep"
              9 => "Oct"
              10 => "Nov"
              11 => "Dec"
            ]
            "weekdays" => array:7 [
              0 => "Sunday"
              1 => "Monday"
              2 => "Tuesday"
              3 => "Wednesday"
              4 => "Thursday"
              5 => "Friday"
              6 => "Saturday"
            ]
            "weekdays_short" => array:7 [
              0 => "Sun"
              1 => "Mon"
              2 => "Tue"
              3 => "Wed"
              4 => "Thu"
              5 => "Fri"
              6 => "Sat"
            ]
            "weekdays_min" => array:7 [
              0 => "Su"
              1 => "Mo"
              2 => "Tu"
              3 => "We"
              4 => "Th"
              5 => "Fr"
              6 => "Sa"
            ]
            "ordinal" => Closure($number)�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Lang/en.php#L71�\^�]8;;�\ {#1597}
            "formats" => array:6 [
              "LT" => "h:mm A"
              "LTS" => "h:mm:ss A"
              "L" => "MM/DD/YYYY"
              "LL" => "MMMM D, YYYY"
              "LLL" => "MMMM D, YYYY h:mm A"
              "LLLL" => "dddd, MMMM D, YYYY h:mm A"
            ]
            "list" => array:2 [
              0 => ", "
              1 => " and "
            ]
            "first_day_of_week" => 1
            "day_of_first_week_of_year" => 1
          ]
          2 => "messages"
        ]
      ]
    ]
    -formatter: Carbon\MessageFormatter\MessageFormatterMapper�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/MessageFormatter/MessageFormatterMapper.php#L28�\^�]8;;�\ {#1587
      #formatter: Symfony\Component\Translation\Formatter\MessageFormatter�]8;;file:///app/vendor/symfony/translation/Formatter/MessageFormatter.php#L23�\^�]8;;�\ {#1594
        -translator: Symfony\Component\Translation\IdentityTranslator�]8;;file:///app/vendor/symfony/translation/IdentityTranslator.php#L23�\^�]8;;�\ {#1596
          -locale: null
        }
        -intlFormatter: Symfony\Component\Translation\Formatter\IntlFormatter�]8;;file:///app/vendor/symfony/translation/Formatter/IntlFormatter.php#L21�\^�]8;;�\ {#1595
          -hasMessageFormatter: ? bool
          -cache: []
        }
      }
    }
    -cacheDir: null
    -debug: false
    -cacheVary: []
    -configCacheFactory: ? ?Symfony\Component\Config\ConfigCacheFactoryInterface
    -parentLocales: array:140 [
      "az_Cyrl" => "root"
      "bs_Cyrl" => "root"
      "en_150" => "en_001"
      "en_AG" => "en_001"
      "en_AI" => "en_001"
      "en_AT" => "en_150"
      "en_AU" => "en_001"
      "en_BB" => "en_001"
      "en_BE" => "en_150"
      "en_BM" => "en_001"
      "en_BS" => "en_001"
      "en_BW" => "en_001"
      "en_BZ" => "en_001"
      "en_CC" => "en_001"
      "en_CH" => "en_150"
      "en_CK" => "en_001"
      "en_CM" => "en_001"
      "en_CX" => "en_001"
      "en_CY" => "en_001"
      "en_DE" => "en_150"
      "en_DG" => "en_001"
      "en_DK" => "en_150"
      "en_DM" => "en_001"
      "en_ER" => "en_001"
      "en_FI" => "en_150"
      "en_FJ" => "en_001"
      "en_FK" => "en_001"
      "en_FM" => "en_001"
      "en_GB" => "en_001"
      "en_GD" => "en_001"
      "en_GG" => "en_001"
      "en_GH" => "en_001"
      "en_GI" => "en_001"
      "en_GM" => "en_001"
      "en_GY" => "en_001"
      "en_HK" => "en_001"
      "en_ID" => "en_001"
      "en_IE" => "en_001"
      "en_IL" => "en_001"
      "en_IM" => "en_001"
      "en_IN" => "en_001"
      "en_IO" => "en_001"
      "en_JE" => "en_001"
      "en_JM" => "en_001"
      "en_KE" => "en_001"
      "en_KI" => "en_001"
      "en_KN" => "en_001"
      "en_KY" => "en_001"
      "en_LC" => "en_001"
      "en_LR" => "en_001"
      "en_LS" => "en_001"
      "en_MG" => "en_001"
      "en_MO" => "en_001"
      "en_MS" => "en_001"
      "en_MT" => "en_001"
      "en_MU" => "en_001"
      "en_MV" => "en_001"
      "en_MW" => "en_001"
      "en_MY" => "en_001"
      "en_NA" => "en_001"
      "en_NF" => "en_001"
      "en_NG" => "en_001"
      "en_NL" => "en_150"
      "en_NR" => "en_001"
      "en_NU" => "en_001"
      "en_NZ" => "en_001"
      "en_PG" => "en_001"
      "en_PK" => "en_001"
      "en_PN" => "en_001"
      "en_PW" => "en_001"
      "en_RW" => "en_001"
      "en_SB" => "en_001"
      "en_SC" => "en_001"
      "en_SD" => "en_001"
      "en_SE" => "en_150"
      "en_SG" => "en_001"
      "en_SH" => "en_001"
      "en_SI" => "en_150"
      "en_SL" => "en_001"
      "en_SS" => "en_001"
      "en_SX" => "en_001"
      "en_SZ" => "en_001"
      "en_TC" => "en_001"
      "en_TK" => "en_001"
      "en_TO" => "en_001"
      "en_TT" => "en_001"
      "en_TV" => "en_001"
      "en_TZ" => "en_001"
      "en_UG" => "en_001"
      "en_VC" => "en_001"
      "en_VG" => "en_001"
      "en_VU" => "en_001"
      "en_WS" => "en_001"
      "en_ZA" => "en_001"
      "en_ZM" => "en_001"
      "en_ZW" => "en_001"
      "es_AR" => "es_419"
      "es_BO" => "es_419"
      "es_BR" => "es_419"
      "es_BZ" => "es_419"
      "es_CL" => "es_419"
      "es_CO" => "es_419"
      "es_CR" => "es_419"
      "es_CU" => "es_419"
      "es_DO" => "es_419"
      "es_EC" => "es_419"
      "es_GT" => "es_419"
      "es_HN" => "es_419"
      "es_MX" => "es_419"
      "es_NI" => "es_419"
      "es_PA" => "es_419"
      "es_PE" => "es_419"
      "es_PR" => "es_419"
      "es_PY" => "es_419"
      "es_SV" => "es_419"
      "es_US" => "es_419"
      "es_UY" => "es_419"
      "es_VE" => "es_419"
      "ff_Adlm" => "root"
      "hi_Latn" => "en_IN"
      "ks_Deva" => "root"
      "nb" => "no"
      "nn" => "no"
      "pa_Arab" => "root"
      "pt_AO" => "pt_PT"
      "pt_CH" => "pt_PT"
      "pt_CV" => "pt_PT"
      "pt_GQ" => "pt_PT"
      "pt_GW" => "pt_PT"
      "pt_LU" => "pt_PT"
      "pt_MO" => "pt_PT"
      "pt_MZ" => "pt_PT"
      "pt_ST" => "pt_PT"
      "pt_TL" => "pt_PT"
      "sd_Deva" => "root"
      "sr_Latn" => "root"
      "uz_Arab" => "root"
      "uz_Cyrl" => "root"
      "zh_Hant" => "root"
      "zh_Hant_MO" => "zh_Hant_HK"
    ]
    -hasIntlFormatter: false
    #messages: array:1 [
      "en" => array:51 [
        "year" => "{1}:count year|{0}:count years|]1,Inf[:count years"
        "a_year" => "{1}a year|{0}:count years|]1,Inf[:count years"
        "y" => "{1}:countyr|{0}:countyrs|]1,Inf[:countyrs"
        "month" => "{1}:count month|{0}:count months|]1,Inf[:count months"
        "a_month" => "{1}a month|{0}:count months|]1,Inf[:count months"
        "m" => "{1}:countmo|{0}:countmos|]1,Inf[:countmos"
        "week" => "{1}:count week|{0}:count weeks|]1,Inf[:count weeks"
        "a_week" => "{1}a week|{0}:count weeks|]1,Inf[:count weeks"
        "w" => ":countw"
        "day" => "{1}:count day|{0}:count days|]1,Inf[:count days"
        "a_day" => "{1}a day|{0}:count days|]1,Inf[:count days"
        "d" => ":countd"
        "hour" => "{1}:count hour|{0}:count hours|]1,Inf[:count hours"
        "a_hour" => "{1}an hour|{0}:count hours|]1,Inf[:count hours"
        "h" => ":counth"
        "minute" => "{1}:count minute|{0}:count minutes|]1,Inf[:count minutes"
        "a_minute" => "{1}a minute|{0}:count minutes|]1,Inf[:count minutes"
        "min" => ":countm"
        "second" => "{1}:count second|{0}:count seconds|]1,Inf[:count seconds"
        "a_second" => "{1}a few seconds|{0}:count seconds|]1,Inf[:count seconds"
        "s" => ":counts"
        "millisecond" => "{1}:count millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
        "a_millisecond" => "{1}a millisecond|{0}:count milliseconds|]1,Inf[:count milliseconds"
        "ms" => ":countms"
        "microsecond" => "{1}:count microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
        "a_microsecond" => "{1}a microsecond|{0}:count microseconds|]1,Inf[:count microseconds"
        "µs" => ":countµs"
        "ago" => ":time ago"
        "from_now" => ":time from now"
        "after" => ":time after"
        "before" => ":time before"
        "diff_now" => "just now"
        "diff_today" => "today"
        "diff_yesterday" => "yesterday"
        "diff_tomorrow" => "tomorrow"
        "diff_before_yesterday" => "before yesterday"
        "diff_after_tomorrow" => "after tomorrow"
        "period_recurrences" => "{1}once|{0}:count times|]1,Inf[:count times"
        "period_interval" => "every :interval"
        "period_start_date" => "from :date"
        "period_end_date" => "to :date"
        "months" => array:12 [
          0 => "January"
          1 => "February"
          2 => "March"
          3 => "April"
          4 => "May"
          5 => "June"
          6 => "July"
          7 => "August"
          8 => "September"
          9 => "October"
          10 => "November"
          11 => "December"
        ]
        "months_short" => array:12 [
          0 => "Jan"
          1 => "Feb"
          2 => "Mar"
          3 => "Apr"
          4 => "May"
          5 => "Jun"
          6 => "Jul"
          7 => "Aug"
          8 => "Sep"
          9 => "Oct"
          10 => "Nov"
          11 => "Dec"
        ]
        "weekdays" => array:7 [
          0 => "Sunday"
          1 => "Monday"
          2 => "Tuesday"
          3 => "Wednesday"
          4 => "Thursday"
          5 => "Friday"
          6 => "Saturday"
        ]
        "weekdays_short" => array:7 [
          0 => "Sun"
          1 => "Mon"
          2 => "Tue"
          3 => "Wed"
          4 => "Thu"
          5 => "Fri"
          6 => "Sat"
        ]
        "weekdays_min" => array:7 [
          0 => "Su"
          1 => "Mo"
          2 => "Tu"
          3 => "We"
          4 => "Th"
          5 => "Fr"
          6 => "Sa"
        ]
        "ordinal" => Closure($number)�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Lang/en.php#L71�\^�]8;;�\ {#1597}
        "formats" => array:6 [
          "LT" => "h:mm A"
          "LTS" => "h:mm:ss A"
          "L" => "MM/DD/YYYY"
          "LL" => "MMMM D, YYYY"
          "LLL" => "MMMM D, YYYY h:mm A"
          "LLLL" => "dddd, MMMM D, YYYY h:mm A"
        ]
        "list" => array:2 [
          0 => ", "
          1 => " and "
        ]
        "first_day_of_week" => 1
        "day_of_first_week_of_year" => 1
      ]
    ]
    #directories: array:1 [
      0 => "/app/vendor/nesbot/carbon/src/Carbon/Lang"
    ]
    #initializing: false
    #aliases: array:2 [
      "me" => "sr_Latn_ME"
      "scr" => "sh"
    ]
    locale: "en"
  }
  +"y": 0
  +"m": 1
  +"d": 4
  +"h": 0
  +"i": 0
  +"s": 0
  +"f": 0.0
  +"invert": 1
  +"days": false
  +"from_string": false
  startDate: Illuminate\Support\Carbon @1580950800�]8;;file:///app/vendor/laravel/framework/src/Illuminate/Support/Carbon.php#L12�\^�]8;;�\ {#3999}
  endDate: Illuminate\Support\Carbon @1577926800�]8;;file:///app/vendor/laravel/framework/src/Illuminate/Support/Carbon.php#L12�\^�]8;;�\ {#4247}
  rawInterval: DateInterval {#3868}
  initialValues: array:9 [
    0 => 0
    1 => 1
    2 => 4
    3 => 0
    4 => 0
    5 => 0
    6 => 0.0
    7 => 1
    8 => false
  ]
  localTranslator: Carbon\Translator�]8;;file:///app/vendor/nesbot/carbon/src/Carbon/Translator.php#L31�\^�]8;;�\ {#1589}
}

Not only is it a different kind of object, but the latter version has days property set to false. Hope this helps! For now, I downgraded Carbon and I'm back in business.

[drifteaur]

I can confirm this happens with Carbon objects. Casting them to DateTime with ->toDateTime() works. Although it shouldn't be necessary, they claim full DateTime compatibility.