Compiling release without sourceMap create a sourcemap named "false"

[DaGaMx]

Bug description

I am new to AssemblyScript and followed your tutorial:
https://www.assemblyscript.org/getting-started.html#setting-up-a-new-project

I checked the output files in a hex editor and was wondering that the release ends with "sourceMappingURL" "false".
Then I saw that a file named "false" is generated in the output folder.

Steps to reproduce

Execute this:
npx asc "C:\test\assembly\index.ts" --target release -o "C:\test\assembly\output\release\index.wasm" -Ospeed --noAssert --optimizeLevel 3

In the output folder "C:\test\assembly\output\release" will be a file named "false".
The output file "C:\test\assembly\output\release\index.wasm" will contain a reference to that source map.

As far as I understand the compiler manual, the source map should only be generated if I specify --sourceMap.

AssemblyScript version

v0.27.10

[woruyu]

Ask a question:
I follows your step to run npx asc "C:\test-as\assembly\index.ts" --target release -o "C:\test-as\assembly\output\release\index.wasm" -Ospeed --noAssert --optimizeLevel 3 but I can't get a file named "false". I just get a file named index.wasm.map. And I guess the reason that you get the source map is in asconfig.json, the sourceMap field is true.

[DaGaMx]

Sorry, there was a minor thing I changed in comparison to your "Getting started" manual.
If I do the same steps like in the manual, then I get the "./index.wasm.map" entry like you.
But if I update the asconfig.json to this:
{ "targets": { "debug": { "outFile": "build/debug.wasm", "textFile": "build/debug.wat", "sourceMap": true, "debug": true }, "release": { "outFile": "build/release.wasm", "textFile": "build/release.wat", "sourceMap": false, "optimizeLevel": 3, "shrinkLevel": 0, "converge": false, "noAssert": false } }, "options": { "bindings": "esm" } }
Then I get the false entry and the false file. (I only changed "sourceMap" to false in the release configuration).

This also happens if I compile using "npm run asbuild".