fix(node): Guard against process.argv[1] being undefined

MIGRATION.md

@@ -66,7 +66,9 @@ If you are using the `Hub` right now, see the following table on how to migrate
 
 ## Deprecate `client.setupIntegrations()`
 
-Instead, use the new `client.init()` method. You should probably not use this directly and instead use `Sentry.init()`, which calls this under the hood. But if you have a special use case that requires that, you can call `client.init()` instead now.
+Instead, use the new `client.init()` method. You should probably not use this directly and instead use `Sentry.init()`,
+which calls this under the hood. But if you have a special use case that requires that, you can call `client.init()`
+instead now.
 
 ## Deprecate `scope.getSpan()` and `scope.setSpan()`
 

packages/node/src/module.ts

@@ -10,7 +10,7 @@ function normalizeWindowsPath(path: string): string {
 
 /** Creates a function that gets the module name from a filename */
 export function createGetModuleFromFilename(
-  basePath: string = dirname(process.argv[1]),
+  basePath: string = process.argv[1] ? dirname(process.argv[1]) : process.cwd(),
   isWindows: boolean = sep === '\\',
 ): (filename: string | undefined) => string | undefined {
   const normalizedBase = isWindows ? normalizeWindowsPath(basePath) : basePath;