Why isn't this error caught?

Basic code example:

try {
  Deno.remove("fakefile");
} catch (err) {
  console.log("File doesn't exist...");
}

console.log("That file didn't exist");

try {
  Deno.remove("fakefile");
} catch (err) {
  console.log("File doesn't exist...");
}

console.log("That file didn't exist");

The output when you run this is the following:

❯ deno run -A delete.js
That file didn't exist
error: Uncaught (in promise) NotFound: No such file or directory (os error 2), remove 'fakefile'
    at async Object.remove (ext:deno_fs/30_fs.js:175:3)

❯ deno run -A delete.js
That file didn't exist
error: Uncaught (in promise) NotFound: No such file or directory (os error 2), remove 'fakefile'
    at async Object.remove (ext:deno_fs/30_fs.js:175:3)

So the code within the catchcatch statement isn't running, but the code after the catch statement is executed. And yet the program crashes due to an uncaught error.

Deno•4y ago•

7 replies

Captain 𝗕𝗘𝗘𝗙🥩

Why isn't this error caught?

Basic code example:

try {
  Deno.remove("fakefile");
} catch (err) {
  console.log("File doesn't exist...");
}

console.log("That file didn't exist");

try {
  Deno.remove("fakefile");
} catch (err) {
  console.log("File doesn't exist...");
}

console.log("That file didn't exist");

The output when you run this is the following:

❯ deno run -A delete.js
That file didn't exist
error: Uncaught (in promise) NotFound: No such file or directory (os error 2), remove 'fakefile'
    at async Object.remove (ext:deno_fs/30_fs.js:175:3)

❯ deno run -A delete.js
That file didn't exist
error: Uncaught (in promise) NotFound: No such file or directory (os error 2), remove 'fakefile'
    at async Object.remove (ext:deno_fs/30_fs.js:175:3)

So the code within the catchcatch statement isn't running, but the code after the catch statement is executed. And yet the program crashes due to an uncaught error.

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Why isn't this error caught?

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