Cannot step xdebug with NetBeans since php 8-CodePudding

Since upgrading from php 7 to php 8, I can no longer Step Into/Step Over/Continue with NetBeans IDE 11.0 and xdebug 3.0.4.

xdebug (via NetBeans) is configured to "Stop at First Line" - and this works. That is, the (local host) web page is suspended, and the NetBeans Step Into/Step Over/Continue buttons are enabled. But, when I click any of Step Into/Step Over/Continue, the xdebug session is closed, and NetBeans no longer prompts. Additionally, the web page completes - but without any output.

There's nothing related in syslog. The php8.0-fpm.log shows no errors. The xdebug.log file is below.

Is there any other log I should be looking at?

[60811] Log opened at 2021-09-24 13:17:34.836984
[60811] [Step Debug] INFO: Checking remote connect back address.
[60811] [Step Debug] INFO: Checking header 'HTTP_X_FORWARDED_FOR'.
[60811] [Step Debug] INFO: Checking header 'REMOTE_ADDR'.
[60811] [Step Debug] INFO: Client host discovered through HTTP header, connecting to 127.0.0.1:7070.
[60811] [Step Debug] INFO: Connected to debugging client: 127.0.0.1:7070 (from REMOTE_ADDR HTTP header). :-)
[60811] [Step Debug] -> <init xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" fileuri="file:///home/flymike/critical_data/http/sarabayracing.home/index.php" language="PHP" xdebug:language_version="8.0.5" protocol_version="1.0" appid="60811" idekey="netbeans-xdebug"><engine version="3.0.4"><![CDATA[Xdebug]]></engine><author><![CDATA[Derick Rethans]]></author><url><![CDATA[https://xdebug.org]]></url><copyright><![CDATA[Copyright (c) 2002-2021 by Derick Rethans]]></copyright></init>

[60811] [Step Debug] <- feature_set -i 32 -n show_hidden -v 1
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="32" feature="show_hidden" success="1"></response>

[60811] [Step Debug] <- feature_set -i 33 -n max_depth -v 3
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="33" feature="max_depth" success="1"></response>

[60811] [Step Debug] <- feature_set -i 34 -n max_children -v 30
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="34" feature="max_children" success="1"></response>

[60811] [Step Debug] <- feature_set -i 35 -n max_data -v 2048
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="35" feature="max_data" success="1"></response>

[60811] [Step Debug] <- breakpoint_set -i 36 -t line -s enabled -f file:///home/flymike/critical_data/http/sarabayracing.home/wp-content/plugins/MJH/EventRegistration/Archive/1.12/classes/time_period.php -n 24
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="breakpoint_set" transaction_id="36" state="enabled" id="608110001"></response>

[60811] [Step Debug] <- breakpoint_set -i 37 -t line -s enabled -f file:///home/flymike/critical_data/http/sarabayracing.home/wp-content/plugins/MJH/EventRegistration/classes/EventRegistration.php -n 113
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="breakpoint_set" transaction_id="37" state="enabled" id="608110002"></response>

[60811] [Step Debug] <- breakpoint_set -i 38 -t line -s enabled -f file:///home/flymike/critical_data/http/sarabayracing.home/wp-content/plugins/MJH/EventRegistration/Archive/1.12/classes/time_period.php -n 89
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="breakpoint_set" transaction_id="38" state="enabled" id="608110003"></response>

[60811] [Step Debug] <- stdout -i 39 -c 1
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="stdout" transaction_id="39" success="1"></response>

[60811] [Step Debug] <- step_into -i 40
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="step_into" transaction_id="40" status="break" reason="ok"><xdebug:message filename="file:///home/flymike/critical_data/http/sarabayracing.home/index.php" lineno="14"></xdebug:message></response>

[60811] [Step Debug] <- stack_get -i 41
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="stack_get" transaction_id="41"><stack where="{main}" level="0" type="file" filename="file:///home/flymike/critical_data/http/sarabayracing.home/index.php" lineno="14"></stack></response>

[60811] [Step Debug] <- context_names -i 42
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="context_names" transaction_id="42"><context name="Locals" id="0"></context><context name="Superglobals" id="1"></context><context name="User defined constants" id="2"></context></response>

[60811] [Step Debug] <- eval -i 43 -- KFxnZXRfb3B0aW9uKHNlbGY6OiRTRVRUSU5HU19OQU1FKQ==
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="eval" transaction_id="43" status="break" reason="ok"><error code="206"><message><![CDATA[error evaluating code]]></message></error></response>

[60811] [Step Debug] <- context_get -i 44 -c 0
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="context_get" transaction_id="44" context="0"></response>

[60811] [Step Debug] <- context_get -i 45 -c 1
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="context_get" transaction_id="45" context="1"><property name="$_COOKIE" fullname="$_COOKIE" type="array" children="1" numchildren="6" page="0" pagesize="30"><property name="wp-settings-1" fullname="$_COOKIE[&quot;wp-settings-1&quot;]" type="string" size="76" encoding="base64"><![CDATA[bGlicmFyeUNvbnRlbnQ9YnJvd3NlJmhpZGV0Yj0xJmVkaXRvcj1odG1sJmVkaXRvcl9wbGFpbl90ZXh0X3Bhc3RlX3dhcm5pbmc9Mg==]]></property><proper
[60811] [Step Debug] <- context_get -i 46 -c 2
[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="context_get" transaction_id="46" context="2"></response>

[60811] [Step Debug] <- step_into -i 47
[60811] [Step Debug] -> <stream xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" type="stdout" encoding="base64"><![CDATA[Q29udGVudC10eXBlOiB0ZXh0L2h0bWw7IGNoYXJzZXQ9VVRGLTg=]]></stream>

[60811] [Step Debug] -> <stream xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" type="stdout" encoding="base64"><![CDATA[DQo=]]></stream>

[60811] [Step Debug] -> <stream xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" type="stdout" encoding="base64"><![CDATA[DQo=]]></stream>

[60811] [Step Debug] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" command="step_into" transaction_id="47" status="stopping" reason="ok"></response>

[60811] Log closed at 2021-09-24 13:17:40.814767

CodePudding user response：

There are some changes between PHP 7.4 and 8.0, which change the behaviour of error checking for internal eval statements, which Xdebug uses when an IDE sets a watch.

If I base64 decode your (or rather the IDE's) eval statement (eval -i 43 -- KFxnZXRfb3B0aW9uKHNlbGY6OiRTRVRUSU5HU19OQU1FKQ==), it says:

(\get_option(self::$SETTINGS_NAME)

There is an extra ( at the start, most likely in a watch that you've set?

Xdebug 3.1 should have a fix for the changes to eval, and you can test this for yourself by installing Xdebug 3.1.0beta2, from either PECL (pecl install xdebug-3.1.0beta2) or from source code.