Not honoring Bundle-RequiredExecutionEnvironment in manifest.mf - eclipse-plugin

Question

I am running Photon on Java 10.
I am testing a small plugin used to help me to learn how to write plugins. When I run the plugin I get the following popup validation message:
Missing Constraint: Bundle-RequiredExecutionEnvironment: JavaSE-10
My MANIFEST.MF file is as follows:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Application
Bundle-SymbolicName: com.packtpub.e4.application;singleton:=true
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: com.packtpub.e4.application.Activator
Bundle-Vendor: PACKTPUB
Require-Bundle: javax.inject;bundle-version="0.0.0",
org.eclipse.swt;bundle-version="0.0.0",
org.eclipse.e4.ui.model.workbench;bundle-version="0.0.0",
org.eclipse.jface;bundle-version="0.0.0",
org.eclipse.e4.ui.services;bundle-version="0.0.0",
org.eclipse.e4.ui.workbench;bundle-version="0.0.0",
org.eclipse.e4.core.di;bundle-version="0.0.0",
org.eclipse.e4.ui.di;bundle-version="0.0.0",
org.eclipse.e4.core.contexts;bundle-version="0.0.0",
org.eclipse.core.runtime;bundle-version="0.0.0",
org.eclipse.e4.core.di.extensions;bundle-version="0.15.100",
org.eclipse.e4.core.services;bundle-version="2.1.100",
org.eclipse.osgi.services;bundle-version="3.7.0"
Bundle-RequiredExecutionEnvironment: JavaSE-10
Automatic-Module-Name: com.packtpub.e4.application
Import-Package: javax.annotation;version="0.0.0"
Bundle-ActivationPolicy: lazy
Service-Component: OSGI-INF/*.xml
My launch configuration is here:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<launchConfiguration type="org.eclipse.pde.ui.RuntimeWorkbench">
<booleanAttribute key="append.args" value="true"/>
<stringAttribute key="application" value="org.eclipse.e4.ui.workbench.swt.E4Application"/>
<booleanAttribute key="askclear" value="true"/>
<booleanAttribute key="automaticAdd" value="false"/>
<booleanAttribute key="automaticValidate" value="true"/>
<stringAttribute key="bootstrap" value=""/>
<stringAttribute key="checked" value="[NONE]"/>
<booleanAttribute key="clearConfig" value="false"/>
<booleanAttribute key="clearws" value="true"/>
<booleanAttribute key="clearwslog" value="false"/>
<stringAttribute key="configLocation" value="${workspace_loc}/.metadata/.plugins/org.eclipse.pde.core/com.packtpub.e4.application.product"/>
<booleanAttribute key="default" value="false"/>
<booleanAttribute key="includeOptional" value="true"/>
<stringAttribute key="location" value="${workspace_loc}/runtime-com.packtpub.e4.application.product"/>
<stringAttribute key="org.eclipse.jdt.launching.JRE_CONTAINER" **value="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-10"/>**
<stringAttribute key="org.eclipse.jdt.launching.PROGRAM_ARGUMENTS" value="-os ${target.os} -ws ${target.ws} -arch ${target.arch} -nl ${target.nl} -consoleLog -clearPersistedState"/>
<stringAttribute key="org.eclipse.jdt.launching.SOURCE_PATH_PROVIDER" value="org.eclipse.pde.ui.workbenchClasspathProvider"/>
<stringAttribute key="pde.version" value="3.3"/>
<stringAttribute key="product" value="com.packtpub.e4.application.product"/>
<stringAttribute key="productFile" value="\com.packtpub.e4.application\com.packtpub.e4.application.product"/>
<stringAttribute key="selected_target_plugins" value="com.ibm.icu#default:default,javax.annotation#default:default,javax.inject#default:default,org.apache.batik.constants#default:default,org.apache.batik.css#default:default,org.apache.batik.i18n#default:default,org.apache.batik.util#default:default,org.apache.commons.io#default:default,org.apache.commons.jxpath#default:default,org.apache.commons.logging#default:default,org.apache.felix.scr#1:true,org.apache.xmlgraphics#default:default,org.eclipse.core.commands#default:default,org.eclipse.core.contenttype#default:default,org.eclipse.core.databinding.beans#default:default,org.eclipse.core.databinding.observable#default:default,org.eclipse.core.databinding.property#default:default,org.eclipse.core.databinding#default:default,org.eclipse.core.expressions#default:default,org.eclipse.core.jobs#default:default,org.eclipse.core.runtime#default:true,org.eclipse.e4.core.commands#default:default,org.eclipse.e4.core.contexts#default:default,org.eclipse.e4.core.di.annotations#default:default,org.eclipse.e4.core.di.extensions.supplier#default:default,org.eclipse.e4.core.di.extensions#default:default,org.eclipse.e4.core.di#default:default,org.eclipse.e4.core.services#default:default,org.eclipse.e4.emf.xpath#default:default,org.eclipse.e4.ui.bindings#default:default,org.eclipse.e4.ui.css.core#default:default,org.eclipse.e4.ui.css.swt.theme#default:default,org.eclipse.e4.ui.css.swt#default:default,org.eclipse.e4.ui.di#default:default,org.eclipse.e4.ui.model.workbench#default:default,org.eclipse.e4.ui.services#default:default,org.eclipse.e4.ui.widgets#default:default,org.eclipse.e4.ui.workbench.renderers.swt#default:default,org.eclipse.e4.ui.workbench.swt#default:default,org.eclipse.e4.ui.workbench3#default:default,org.eclipse.e4.ui.workbench#default:default,org.eclipse.emf.common#default:default,org.eclipse.emf.databinding#default:default,org.eclipse.emf.ecore.change#default:default,org.eclipse.emf.ecore.xmi#default:default,org.eclipse.emf.ecore#default:default,org.eclipse.equinox.app#default:default,org.eclipse.equinox.common#2:true,org.eclipse.equinox.concurrent#default:default,org.eclipse.equinox.ds#1:true,org.eclipse.equinox.event#default:default,org.eclipse.equinox.preferences#default:default,org.eclipse.equinox.registry#default:default,org.eclipse.jface.databinding#default:default,org.eclipse.jface#default:default,org.eclipse.osgi.compatibility.state#default:false,org.eclipse.osgi.services#default:default,org.eclipse.osgi.util#default:default,org.eclipse.osgi#-1:true,org.eclipse.swt.win32.win32.x86_64#default:false,org.eclipse.swt#default:default,org.w3c.css.sac#default:default,org.w3c.dom.events#default:default,org.w3c.dom.smil#default:default,org.w3c.dom.svg#default:default"/>
<stringAttribute key="selected_workspace_plugins" value="com.packtpub.e4.application#default:default"/>
<booleanAttribute key="show_selected_only" value="false"/>
<booleanAttribute key="tracing" value="false"/>
<booleanAttribute key="useCustomFeatures" value="false"/>
<booleanAttribute key="useDefaultConfig" value="true"/>
<booleanAttribute key="useDefaultConfigArea" value="true"/>
<booleanAttribute key="useProduct" value="true"/>
<booleanAttribute key="usefeatures" value="false"/>
</launchConfiguration>
As you can see, the launch configuration is requesting JaveSE 10- I am at a loss to see why I am getting this error as the plugin loads and runs without other problems.

Answer 1

This seems to be an Eclipse bug. JavaSE-10 just doesn't work in Bundle-RequiredExecutionEnvironment.
A workaround is to just use JavaSE-9 in the Bundle-RequiredExecutionEnvironment. You may get a warning that the JRE container is not a perfect match, this can be ignored.