Crash with "TypeError: Cannot read property 'render' of null"

[DreierF]

• Rollup Version: 2.26.6
• Operating System (or Browser): Not relevant
• Node Version (if applicable): Not relevant
• Link to reproduction (IMPORTANT, read below): Minimal failing sample REPL

Expected Behavior

Code is processed without errors

Actual Behavior

Rollup crashes with "TypeError: Cannot read property 'render' of null".

[kzc]

Node and Chrome produce the error above.

Curiously on Firefox the error is different: "TypeError: this.usedBranch is null". Some async functions may be firing in a different order.

[lukastaegert]

Thanks for spotting. So the problem surfaces when rendering a logical expression that is not actually executed. I will investigate how to solve it:
https://rollupjs.org/repl/?version=2.26.6&shareable=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

[lukastaegert]

Fix at #3752. As it turned out, there were quite a few more edge cases that were broken, which prompted me to reimplement how hoisted variables in if-statements are rendered.