Questions & Help>Questions

IO.warn doesn't stop compiler with --warning-as-errors

#compiler
sezaru

sezaru

IO.warn doesn't stop compiler with --warning-as-errors

In my project, I have a compile-time code that can generate some warning depending on some circumstances.

To show the warning I do IO.warn(“…”).

The problem is that, with this, the compiler will happily continue even if I add –warning-as-errors option.

Shouldn’t that option make the compiler fail in this case or am I missing something here?

7 comments
#compiler
7 112 7

Marked As Solved

Gazler

Gazler

Phoenix Core Team

In this example, you have used --warning-as-errors and not --warnings-as-errors

5
Post #7

Also Liked

al2o3cr

al2o3cr

FWIW, IO.warn/1 directly calls IO.warn/2:

@sezaru - long shot, but is it possible you’re running into something weird from the tail-call optimization mentioned in the docs for IO.warn/1?

1
Post #3
sezaru

sezaru

Dear god, I can’t believe that was it…:sweat_smile: :joy:

1
Post #8

Where Next?

View thread on forum (has 7 responses!)
compiler
Home Questions & Help>Questions
#compiler
7 113 7
Last post

Popular in Questions Top

sergio
Questions & Help>Questions

Updating a field using Ecto one-liner?
In Ruby, I can go: User.find_by(email: "foobar@email.com").update(email: "hello@email.com") How can I do something similar in Elixir? ...
15 14579 3
New
tduccuong
Questions & Help>Questions

Desktop GUI app with Elixir?
Hi, is there any work on GUI with Elixir, that is similar to Electron/Javascript? My idea is to bundle Phoenix and BEAM into a single se...
/phoenix#gui
34 13194 12
New
lastday4you
Questions & Help>Questions

How to check Elixir version
I wanted to check elixir version in phoenix because i found that my elixir is 1.5 but when i use Enum.chunk_by it said the function is un...
#how-to-question
11 18647 3
New
mcarvalho
Questions & Help>Questions

System.get_env vs. Application.get_env
What is the difference between System.get_env and Application.get_env? For example, what are best practices to use one versus another.
#environment
13 17021 6
New
chensan
Questions & Help>Questions

(Postgrex.Error) ERROR 42804 (datatype_mismatch): column "" cannot be cast automatically to type integer
I have a User schema with a :from_id field set to type :string: defmodule TweetBot.Repo.Migrations.CreateUsers do use Ecto.Migration ...
#ecto
29 13294 4
New
LegitStack
Questions & Help>Questions

Websocket server in Elixir or phoenix
I’m trying to make a websocket server in Phoenix or raw Elixir. I heard about gun, I think I could use cowboy, but since I’m not that sma...
/phoenix#websockets
20 11315 8
New
beno
Questions & Help>Questions

Pattern match with multiple match options
I will often find my self writing things similar to: case some_value do nil -> something() "" -> something() _ -> someth...
#pattern-matching#how-to-question
29 15490 6
New
Mooodi
Questions & Help>Questions

Get a char from a string by index
Given a string, how can I get access to its character by index? Enum.at("my_string", 2) doesn't work. Or rather, not char, but a substr...
12 13252 4
New
lanycrost
Questions & Help>Questions

How To Implement if...else if...else condition
Hi everyone! I need implement if…else if…else condition from my elixir code, and anymore of this control flow structures not work proper...
#how-to-question
40 51494 6
New
idi527
Questions & Help>Questions

How I would create a multiline string without a trailing line break with Elixir?
I’ve been re-reading swift book again and noticed that multiline strings there don’t have a trailing line break, unlike in elixir iex(2)...
#strings
33 13891 10
New

Other popular topics Top

Tee
Questions & Help>Questions

Enumerables - how does Enum.reduce work with maps
can someone please explain to me how Enum.reduce works with maps
#erlang
18 14675 13
New
JorisKok
Questions & Help>Questions

How is it possible to get 2 million websocket connections when you have 65536 available ports?
I have a server on AWS, and was running a load test using artillery. When looking at the Phoenix dashboard I see the Ports going to 100% ...
/phoenix
20 17308 4
New
hariharasudhan94
Questions & Help>Questions

What is the best IDE for elixir?
I would like to know what is the best IDE for elixir development?
#code-editors
33 49503 23
New
vac
Questions & Help>Questions

Formatting a string to PEM with headers and line breaks
Hi, I'm quite new in Elixir and I'm trying to format a string to a PEM format. I have the certificate value like MIIDBTCCAe2...... and ...
2 14555 7
New
mcarvalho
Questions & Help>Questions

System.get_env vs. Application.get_env
What is the difference between System.get_env and Application.get_env? For example, what are best practices to use one versus another.
#environment
13 17021 6
New
chensan
Questions & Help>Questions

(Postgrex.Error) ERROR 42804 (datatype_mismatch): column "" cannot be cast automatically to type integer
I have a User schema with a :from_id field set to type :string: defmodule TweetBot.Repo.Migrations.CreateUsers do use Ecto.Migration ...
#ecto
29 13294 4
New
fayddelight
Questions & Help>Questions

Installing elixir via asdf shows zsh: command not found: iex
I tried installing elixir 1.11.2 erlang 23.3.4 via asdf in my zsh shell. Enabled the versions locally and globally. When I list them ...
#erlang#asdf
44 16425 17
New
lucidguppy
Questions & Help>Questions

How do I read a file and enumerate its lines
I have a super simple question about elixir - how would I take a file like this foo bar baz and output a new file that enumerates th...
#how-to-question
20 15454 3
New
lanycrost
Questions & Help>Questions

How To Implement if...else if...else condition
Hi everyone! I need implement if…else if…else condition from my elixir code, and anymore of this control flow structures not work proper...
#how-to-question
40 51494 6
New
magnetic
Learning Resources>Guides/Tuts/Tips/Info

Configuring VSCode to use with Elixir and Phoenix Templates
Hey :wave:t3: Elixir community, I’ve been learning Elixir, and working on some side projects. My editor of choice is VSCode, and althoug...
#phoenix_html#vs-code#vscode-elixir#elixir-ls
43 16832 15
New
Back to top

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers. By developers, for developers.

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement