OS#15334058: Fix class extends null and this access for super property reference
#4629
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…perty reference We were supporting some old version of the spec language around classes which extend from null. Instead of leaving `this` undeclared, we were constructing an object and assigning it the `this` binding. This meant we were not throwing ReferenceErrors on access to `this` when we should have been. Also fixed the case where a super property reference failed to access `this` resulting in trying to load a property from null. Fixes: https://microsoft.visualstudio.com/OS/_workitems/edit/15334058
digitalinfinity
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Feb 1, 2018
chakrabot
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…his` access for super property reference Merge pull request #4629 from boingoing:ClassExtendsNull We were supporting some old version of the spec language around classes which extend from null. Instead of leaving `this` undeclared, we were constructing an object and assigning it the `this` binding. This meant we were not throwing ReferenceErrors on access to `this` when we should have been. Also fixed the case where a super property reference failed to access `this` resulting in trying to load a property from null. Fixes: https://microsoft.visualstudio.com/OS/_workitems/edit/15334058
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Thanks |
chakrabot
pushed a commit
that referenced
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Feb 1, 2018
…ll` and `this` access for super property reference Merge pull request #4629 from boingoing:ClassExtendsNull We were supporting some old version of the spec language around classes which extend from null. Instead of leaving `this` undeclared, we were constructing an object and assigning it the `this` binding. This meant we were not throwing ReferenceErrors on access to `this` when we should have been. Also fixed the case where a super property reference failed to access `this` resulting in trying to load a property from null. Fixes: https://microsoft.visualstudio.com/OS/_workitems/edit/15334058
chakrabot
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that referenced
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Feb 1, 2018
…ss extends null` and `this` access for super property reference Merge pull request #4629 from boingoing:ClassExtendsNull We were supporting some old version of the spec language around classes which extend from null. Instead of leaving `this` undeclared, we were constructing an object and assigning it the `this` binding. This meant we were not throwing ReferenceErrors on access to `this` when we should have been. Also fixed the case where a super property reference failed to access `this` resulting in trying to load a property from null. Fixes: https://microsoft.visualstudio.com/OS/_workitems/edit/15334058
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@oliverchang This was found by OSS-Fuzz, issue 4831. |
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We were supporting some old version of the spec language around classes which extend from null. Instead of leaving
thisundeclared, we were constructing an object and assigning it thethisbinding. This meant we were not throwing ReferenceErrors on access tothiswhen we should have been.Also fixed the case where a super property reference failed to access
thisresulting in trying to load a property from null.Fixes:
https://microsoft.visualstudio.com/OS/_workitems/edit/15334058