Potential memory leak of `vue-tsc --noEmit -w`

Reproduction

1. pnpm create vite bug-vue-tsc
2. select vue and vue-ts
3. pnpm i vue-tsc@latest -D
4. NODE_OPTIONS='--max_old_space_size=700' pnpm exec vue-tsc --noEmit -w
5. Modify any code of App.vue and wait for the watch process response.
6. Repeat step 5 for about 7 times and the process will OOM 🤔

FYI: I tried setting max_old_space_size to 2000 but still crash about 18 times of modification. Use htop to inspect I find the memory of the process keeps growing 🤔.

<--- Last few GCs --->

[2461:0x7f9d08008000]    36171 ms: Mark-sweep 697.9 (714.9) -> 696.7 (714.7) MB, 284.8 / 0.0 ms  (average mu = 0.128, current mu = 0.028) allocation failure scavenge might not succeed
[2461:0x7f9d08008000]    36416 ms: Mark-sweep (reduce) 699.0 (714.7) -> 698.6 (713.7) MB, 39.8 / 0.0 ms  (+ 145.5 ms in 31 steps since start of marking, biggest step 5.7 ms, walltime since start of marking 197 ms) (average mu = 0.182, current mu = 0.244) 

<--- JS stacktrace --->

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
 1: 0x1070a2a25 node::Abort() (.cold.1) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 2: 0x105d980f9 node::Abort() [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 3: 0x105d9826f node::OnFatalError(char const*, char const*) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 4: 0x105f19787 v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 5: 0x105f19723 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 6: 0x1060bae05 v8::internal::Heap::FatalProcessOutOfMemory(char const*) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 7: 0x1060b978c v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpaceÏ v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 8: 0x1060c6030 v8::internal::Heap::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
 9: 0x1060c60b1 v8::internal::Heap::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
10: 0x106093147 v8::internal::Factory::NewFillerObject(int, bool, v8::internal::AllocationType, v8::internal::AllocationOrigin) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
11: 0x10644ad4e v8::internal::Runtime_AllocateInYoungGeneration(int, unsigned long*, v8::internal::Isolate*) [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
12: 0x1067f4819 Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit [/Users/fi3ework/Library/Application Support/fnm/node-versions/v16.14.0/installation/bin/node]
13: 0x10b169ab7 
14: 0x10b1fa2e4 
15: 0x10b0f8099 
16: 0x10ac789e8 
17: 0x10b16ea97 
18: 0x10ad30528 
 ERR_PNPM_RECURSIVE_EXEC_FIRST_FAIL  Command was killed with SIGABRT (Aborted): /Users/fi3ework/Downloads/test1/node_modules/.bin/vue-tsc --noEmit -w

Expected behavior

Do not leak memory.

System info

npx envinfo --system --npmPackages vue-tsc --binaries --browsers

  System:
    OS: macOS 12.3
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Memory: 543.25 MB / 32.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 16.14.0 - ~/Library/Caches/fnm_multishells/51303_1648175932312/bin/node
    Yarn: 1.22.18 - ~/Library/Caches/fnm_multishells/51303_1648175932312/bin/yarn
    npm: 8.3.1 - ~/Library/Caches/fnm_multishells/51303_1648175932312/bin/npm
  Browsers:
    Chrome: 99.0.4844.83
    Firefox: 98.0.2
    Safari: 15.4
  npmPackages:
    vue-tsc: ^0.33.7 => 0.33.7 

Package manager

pnpm@^6

[kevinvalk]

Like @PatrickRose mentioned, I am observing the same memory leaking behavior (running within docker container).

However, we are using the vite-plugin-checker to run vue-tsc. On every reload the memory consumption of the node process grows a bit and will go out of memory after a certain number of reloads. But it seems that more people in https://github.com/fi3ework/vite-plugin-checker/issues/127 are suffering from this issue and it looks like the leak is occurring in vue-tsc.

Configuration:

...
export default defineConfig({
	plugins: [
		...
		checker({ vueTsc: true, enableBuild: false }),
	],
...

/app $ npx envinfo --system  --binaries --browser 

  System:
    OS: Linux 5.10 Alpine Linux
    CPU: (4) arm64 unknown
    Memory: 2.27 GB / 6.77 GB
    Container: Yes
    Shell: 1.35.0 - /bin/ash
  Binaries:
    Node: 16.15.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 8.11.0 - /usr/local/bin/npm

/app $ yarn list --pattern vue-tsc
yarn list v1.22.19
└─ vue-tsc@0.38.2

[lmcsu]

The same. After multiple savings it dies the same way. OS: Ubuntu LTS