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fix: determine anonymous function wrapper offset at runtime #2266

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merged 1 commit into from
Feb 26, 2021
Merged

fix: determine anonymous function wrapper offset at runtime #2266

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15 changes: 12 additions & 3 deletions packages/vite/src/node/ssr/ssrStacktrace.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,17 @@
import { SourceMapConsumer, RawSourceMap } from 'source-map'
import { ModuleGraph } from '../server/moduleGraph'

let offset: number
try {
new Function('throw new Error(1)')()
} catch (e) {
// in Node 12, stack traces account for the function wrapper.
// in Node 13 and later, the function wrapper adds two lines,
// which must be subtracted to generate a valid mapping
const match = /:(\d+):\d+\)$/.exec(e.stack.split('\n')[1])
offset = match ? +match[1] - 1 : 0
}

export function ssrRewriteStacktrace(stack: string, moduleGraph: ModuleGraph) {
return stack
.split('\n')
Expand All @@ -22,9 +33,7 @@ export function ssrRewriteStacktrace(stack: string, moduleGraph: ModuleGraph) {
)

const pos = consumer.originalPositionFor({
// source map lines generated via new Function() in Node.js is always
// incremented by 2 due to the function wrapper
line: Number(line) - 2,
line: Number(line) - offset,
column: Number(column),
bias: SourceMapConsumer.LEAST_UPPER_BOUND
})
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