source map not work

[billowz]

Expected Behavior

Current Behavior

1. isbanbul plugin print error on configuring the source map

TypeError: instrumenter.lastSourceMap(...).toJSON is not a function
    at Object.transform (/test/node_modules/rollup-plugin-istanbul/dist/rollup-plugin-istanbul.cjs.js:30:58)
    at Promise.resolve.then (/test/node_modules/rollup/dist/rollup.js:15344:25)

2. the souceMap option not work, need to config instrumenterConfig.produceSourceMap

Steps to Reproduce

• isbanbul plugin plugin configuration

istanbul({
	exclude: ['test/*'],
	sourceMap: true,
	instrumenterConfig: {
		produceSourceMap: true
	}
})

Context (Environment)

Windows 10, node v10.15.3

Possible Implementation

1. instrumenter.lastSourceMap returns (null | Object) the source map object.
2. set instrumenterConfig.produceSourceMap on ops.sourceMap enabled

[billowz]

see rollup/rollup#2983, the istanbul-lib-instrument require the inputSourceMap to maps the not instrumented code back to it's original form

[tommck]

It seems that this was fixed rollup/rollup#2993

Is this support added here yet?

[artberri]

The new version 3.0.0 that I've already published in the npm registry should fix the bug.

Thank you for the report.