<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><br></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Ella Ananeva" <ella.ananeva@oracle.com><br><b>To: </b>"amber-dev" <amber-dev@openjdk.org><br><b>Sent: </b>Monday, May 20, 2024 11:12:55 PM<br><b>Subject: </b>A possible bug in JEP 482: Flexible Constructor Bodies<br></blockquote></div><div><style><!--
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--></style></div><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div class="WordSection1"><p class="MsoNormal">Hi,</p><p class="MsoNormal"> </p><p class="MsoNormal">I found a discrepancy in the behavior of the JEP 482 compiler regarding definite assignment of a final non-static blank field in a prologue of a constructor:</p><table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse: collapse; border: none;" data-mce-style="border-collapse: collapse; border: none;"><tbody><tr><td width="208" valign="top" style="width: 155.8pt; border: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.8pt; border: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal">Case 1</p></td><td width="208" valign="top" style="width: 155.85pt; border: solid windowtext 1.0pt; border-left: none; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border: solid windowtext 1.0pt; border-left: none; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal">Case 2</p></td><td width="208" valign="top" style="width: 155.85pt; border: solid windowtext 1.0pt; border-left: none; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border: solid windowtext 1.0pt; border-left: none; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal">Case 3</p></td></tr><tr><td width="208" valign="top" style="width: 155.8pt; border: solid windowtext 1.0pt; border-top: none; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.8pt; border: solid windowtext 1.0pt; border-top: none; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">class </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">Q </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">{<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">final int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br> { </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">; }<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">public </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;">Q</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">) {<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; background: yellow; mso-highlight: yellow; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; background: yellow; mso-highlight: yellow; mso-ligatures: none;">super</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; background: yellow; mso-highlight: yellow; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; background: yellow; mso-highlight: yellow; mso-ligatures: none;">();</span></p><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;"> }<br>}</span></p></td><td width="208" valign="top" style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">class </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">Q </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">{<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">final int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br> { </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">; }<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">public </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;">Q</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">) {<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; background: yellow; mso-highlight: yellow; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; background: yellow; mso-highlight: yellow; mso-ligatures: none;">this</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; background: yellow; mso-highlight: yellow; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; background: yellow; mso-highlight: yellow; mso-ligatures: none;">();</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;"><br> }</span></p><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">public </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;">Q</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">() {}<br>}</span></p></td><td width="208" valign="top" style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">class </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">Q </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">{<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">final int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">;<br> { </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">y </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">; }<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">public </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #00627a; mso-ligatures: none;">Q</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #0033b3; mso-ligatures: none;">int </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">) {<br></span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #871094; mso-ligatures: none;">x </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">= </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: black; mso-ligatures: none;">a</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;" data-mce-style="font-size: 10.0pt; font-family: 'Courier New'; color: #080808; mso-ligatures: none;">; <br> }<br>}</span></p><p class="MsoNormal"> </p></td></tr><tr><td width="208" valign="top" style="width: 155.8pt; border: solid windowtext 1.0pt; border-top: none; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.8pt; border: solid windowtext 1.0pt; border-top: none; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal">Compilation succeeds</p></td><td width="208" valign="top" style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="color: black;" data-mce-style="color: black;">Compilation fails</span></p></td><td width="208" valign="top" style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;" data-mce-style="width: 155.85pt; border-top: none; border-left: none; border-bottom: solid windowtext 1.0pt; border-right: solid windowtext 1.0pt; padding: 0in 5.4pt 0in 5.4pt;"><p class="MsoNormal" style="background: white;" data-mce-style="background: white;"><span style="color: black;" data-mce-style="color: black;">Compilation fails</span></p></td></tr></tbody></table><p class="MsoNormal"> </p><p class="MsoNormal">Shouldn’t the behavior in this 3 cases be similar?</p><p class="MsoNormal"> </p></div></blockquote><div><br></div><div>Hello,</div><div>case 3 is equivalent to</div><div><br></div><div><div style="background-color: #ffffff; color: #080808;" data-mce-style="background-color: #ffffff; color: #080808;"><pre style="font-family: 'JetBrains Mono',monospace; font-size: 9.8pt;" data-mce-style="font-family: 'JetBrains Mono',monospace; font-size: 9.8pt;"><span style="color: #0033b3;" data-mce-style="color: #0033b3;">class </span><span style="color: #000000;" data-mce-style="color: #000000;">Q </span>{<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">final int </span><span style="color: #871094;" data-mce-style="color: #871094;">x</span>;<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">int </span><span style="color: #871094;" data-mce-style="color: #871094;">y</span>;<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">public </span><span style="color: #00627a;" data-mce-style="color: #00627a;">Q</span>(<span style="color: #0033b3;" data-mce-style="color: #0033b3;">int </span><span style="color: #000000;" data-mce-style="color: #000000;">a</span>) {<br> <span style="color: #871094;" data-mce-style="color: #871094;">y </span>= <span style="color: #871094;" data-mce-style="color: #871094;">x</span>;<br> <span style="color: #871094;" data-mce-style="color: #871094;">x </span>= <span style="color: #000000;" data-mce-style="color: #000000;">a</span>;<br> }<br>}<br><br>so 'y' can not be initialized by 'x' given that 'x' is not initialized.<br>case 1 is equivalent to<br></pre><div style="background-color: #ffffff; color: #080808;" data-mce-style="background-color: #ffffff; color: #080808;"><pre style="font-family: 'JetBrains Mono',monospace; font-size: 9.8pt;" data-mce-style="font-family: 'JetBrains Mono',monospace; font-size: 9.8pt;"><span style="color: #0033b3;" data-mce-style="color: #0033b3;">class </span><span style="color: #000000;" data-mce-style="color: #000000;">Q </span>{<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">final int </span><span style="color: #871094;" data-mce-style="color: #871094;">x</span>;<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">int </span><span style="color: #871094;" data-mce-style="color: #871094;">y</span>;<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">public </span><span style="color: #00627a;" data-mce-style="color: #00627a;">Q</span>(<span style="color: #0033b3;" data-mce-style="color: #0033b3;">int </span><span style="color: #000000;" data-mce-style="color: #000000;">a</span>) {<br> <span style="color: #871094;" data-mce-style="color: #871094;">x </span>= <span style="color: #000000;" data-mce-style="color: #000000;">a</span>;<br> <span style="color: #0033b3;" data-mce-style="color: #0033b3;">super</span>();<br> <span style="color: #871094;" data-mce-style="color: #871094;">y </span>= <span style="color: #871094;" data-mce-style="color: #871094;">x</span>;<br> }<br>}</pre></div></div><div style="background-color: #ffffff; color: #080808;" data-mce-style="background-color: #ffffff; color: #080808;">so it compiles correctly, when y = x is executed, x is already initialized.</div><div style="background-color: #ffffff; color: #080808;" data-mce-style="background-color: #ffffff; color: #080808;"><br data-mce-bogus="1"></div><div style="background-color: #ffffff; color: #080808;" data-mce-style="background-color: #ffffff; color: #080808;">For me, case 2 is a compiler bug, the call to this() is indirectly a super constructor call.<br></div></div><div><br></div><blockquote style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div class="WordSection1"><p class="MsoNormal">Thank you,</p><p class="MsoNormal">Ella</p></div></blockquote><div><br></div><div>regards,<br data-mce-bogus="1"></div><div>Rémi<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></div></div></body></html>