Bug: [BUG]

[yan5]

Describe the bug

I'm getting below error when I log as below

const reqBody = await event.request.formData();
log.info(reqBody)

event is https://kit.svelte.dev/docs/types#public-types-requestevent.
but it works fine if I do log.info(JSON.stringify(reqBody))

TypeError Cannot read properties of undefined (reading 'reduce')
error stack:
• undici [nodejs.util.inspect.custom]
internal/deps/undici/undici:4887
• inspect formatValue
internal/util/inspect:806
• inspect inspect
internal/util/inspect:365
• inspect formatWithOptionsInternal
internal/util/inspect:2304
• inspect formatWithOptions
internal/util/inspect:2166
• index.js Object.transportFormatted
/node_modules/.pnpm/[email protected]/node_modules/tslog/dist/esm/runtime/nodejs/index.js:107
• BaseLogger.js Logger.log
/node_modules/.pnpm/[email protected]/node_modules/tslog/dist/esm/BaseLogger.js:101
• index.js Logger.info
/node_modules/.pnpm/[email protected]/node_modules/tslog/dist/esm/index.js:26
•

• task_queues process.processTicksAndRejections
internal/process/task_queues:95

Screenshots

Additional context
Add any other context about the problem here.

Node.js Version
v20.16.0

Same issue with Bun 1.1.21 as well.

OS incl. Version
Ubuntu 24.04 LTS 6.8.0-39-generic

[PAStheLoD]

Hello,

We ran into the same (?) issue on Node v22.3.0 with tslog 4.9.3 (also via pnpm), also reading a fetch Response object (so stacktrace goes like formatWithOptions, inspect, formatValuie, [nodejs.util.inspect.custom] in undici, then get status).

(Also note that regarding the opening bug report undici has this warning: The body returned from undici.request does not implement .formData().)

Though it seems the root cause is likely that tslog does not handle errors during formatting of the log line. :/