getappmap / getappmap/appmap-node

app-map node crashes

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Dominant language
TypeScript
Stars
13
Forks
6
Avg merge
18h 23m
Merged PRs (30d)
8

Description

I tried to start my node app using
npx appmap-node yarn
but it crashes with:

  throw err;
    ^

AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:

  (0, node_assert_1.default)(this.stream)

    at Recording.emit (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\Recording.js:147:35)
    at Recording.httpClientResponse (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\Recording.js:93:14)
    at <localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\hooks\http.js:108:31
    at Array.forEach (<anonymous>)
    at IncomingMessage.<anonymous> (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\hooks\http.js:106:28)
    at Object.onceWrapper (node:events:631:28)
    at IncomingMessage.emit (node:events:529:35)
    at endReadableNT (node:internal/streams/readable:1368:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  generatedMessage: true,
  code: 'ERR_ASSERTION',
  actual: undefined,
  expected: true,
  operator: '=='  throw err;
    ^

AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:

  (0, node_assert_1.default)(this.stream)

    at Recording.emit (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\Recording.js:147:35)
    at Recording.httpClientResponse (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\Recording.js:93:14)
    at <localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\hooks\http.js:108:31
    at Array.forEach (<anonymous>)
    at IncomingMessage.<anonymous> (<localDir>\npm-cache\_npx\c76987c9a3c183fa\node_modules\appmap-node\dist\hooks\http.js:106:28)
    at Object.onceWrapper (node:events:631:28)
    at IncomingMessage.emit (node:events:529:35)
    at endReadableNT (node:internal/streams/readable:1368:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  generatedMessage: true,
  code: 'ERR_ASSERTION',
  actual: undefined,
  expected: true,
  operator: '=='

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the crash with npx appmap-node yarn <my node app command>, then inspect dist/Recording.js and dist/hooks/http.js at the stack-trace locations. Done means the command no longer raises the this.stream assertion; add or run a regression check if the repository provides one.

Written by the indexing model from the issue text.

Assessment

Tech stack
node.js
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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