TypeError: this.context.nodeConstructors[esTreeNode.consequent.type] is not a constructor

[gregid]

• Rollup Version: 2.26.7 and higher
• Operating System (or Browser): Windows 10
• Node Version (if applicable): v14.5.0
• Link to reproduction (IMPORTANT, read below): Unable to reproduce outside of my project yet

I am currently trying to make a reproducible case and will update this issue when the culprit is found. The error message is pretty meaningless so finding the cause is problematic.

Expected Behavior

After upgrading from 2.26.6 where rollup is working correctly to 2.26.7 (and 8,9,10) it should work the same

Actual Behavior

Instead the following error is printed

[!] TypeError: this.context.nodeConstructors[esTreeNode.consequent.type] is not a constructor
TypeError: this.context.nodeConstructors[esTreeNode.consequent.type] is not a constructor
    at IfStatement.parseNode (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:7311:27)
    at new NodeBase (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:2824:14)
    at new IfStatement (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:7265:9)
    at BlockStatement$1.parseNode (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:2938:27)
    at new NodeBase (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:2824:14)
    at new BlockStatement$1 (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:5983:9)
    at FunctionExpression$1.parseNode (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:4340:21)
    at new NodeBase (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:2824:14)
    at new FunctionNode (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:4250:9)
    at new FunctionExpression$1 (E:\Projects\!Current\morpho\node_modules\rollup\dist\shared\rollup.js:7248:1)

Works fine with <= 2.26.6 so it is a regression problem related to #3752: https://github.com/rollup/rollup/pull/3752/files#diff-df354c9e51f1407474114304de5c8429R73

[gregid]

OK the error is caused by the same problem as in #3766. Using debugger in the code is causing rollup to fail. Since this is a duplicate I am closing the issue.