Cannot read property 'findDeclaration' of undefined

[piotr-cz]

Since update to v0.38.2 I've started to receive following fatal error:
Cannot read property 'findDeclaration' of undefined.

Only thing I've been able to confrim is that the scope which is passed callHasEffects function is indeed undefined.

Issue persists in v0.38.3.

Stack trace

TypeError: Cannot read property 'findDeclaration' of undefined at callHasEffects (xxx\node_modules\rollup\src\ast\nodes\shared\callHasEffects.js:75:29) at CallExpression.hasEffects (xxx\node_modules\rollup\src\ast\nodes\CallExpression.js:30:10) at CallExpression.isUsedByBundle (xxx\node_modules\rollup\src\ast\nodes\CallExpression.js:41:15) at xxx\node_modules\rollup\src\Bundle.js:161:31

[kzc]

Could you post a small javascript example that triggers this error?

[sunjay]

I'm also experiencing this problem. There was no error until I updated to the latest rollup. The stack trace also doesn't point to any of my code so there is nothing I can provide to reproduce the problem without some more information from the rollup team about what to look for.

I'm using rollup v0.39.0

Cannot read property 'findDeclaration' of undefined
TypeError: Cannot read property 'findDeclaration' of undefined
    at callHasEffects (./node_modules/rollup/src/ast/nodes/shared/callHasEffects.js:75:29)
    at CallExpression.hasEffects (./node_modules/rollup/src/ast/nodes/CallExpression.js:34:10)
    at CallExpression.isUsedByBundle (./node_modules/rollup/src/ast/nodes/CallExpression.js:45:15)
    at ./node_modules/rollup/src/Bundle.js:162:31

[sunjay]

Rolling back to 0.38.1 fixes the problem for the time being. That means something something happened between 0.38.1 and 0.38.2 to cause this.

[yamafaktory]

Hi, I am also experiencing the same issue after a Greenkeeper PR. You can check it here: yamafaktory/buble-react-rollup-starter#8.

[kzc]

Repro thanks to @yamafaktory

Adapted from react-dom/lib/validateDOMNesting.js in production mode:

rollup version 0.39.0

$ cat repro.js

if (0) {
    var inScopeTags = [];
    var buttonScopeTags = inScopeTags.concat(['button']);
}

$ node bin/rollup repro.js

Cannot read property 'findDeclaration' of undefined

Regression introduced in commit b287370

[piotr-cz]

I'm using react and react-dom as well and AFAIK error pops up only in production mode.
It might indeed be b287370 because it was merged into v0.38.2

[Rich-Harris]

Thanks all – fixed in 0.39.1