ERL-1058: -compile([debug_info]). has no effect

[OTP-Maintainer]

Original reporter: kjellwinblad
Affected version: OTP-23.0
Fixed in version: OTP-23.0-rc2
Component: compiler
Migrated from: https://bugs.erlang.org/browse/ERL-1058

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The statement "-compile([debug_info])." in an erlang file does not seem to have any effect. I have only tested this with the master branch (commit 91851e286082b271299fb8d332492430cf084902) but other versions seems to be affected as well. The following text (copied from https://stackoverflow.com/questions/21198092/) describes how to reproduce the bug:


From https://stackoverflow.com/questions/21198092 :
{code:}

After overcoming some troubles with installation I tried to use erlang debugger on simple module:

I included -compile([debug_info]). option in source file and compiled with:

1> c(test_module).

This did not work as expected: After running

2> debugger:start().

the monitor window appeared, then I clicked

Module->Interpret...->test_module.erl

and got error

"Error when interpreting: test_module.erl: No debug_info in BEAM file".

Deleting -compile([debug_info]). line and changing

1> c(test_module).

to

1> c(test_module, [debug_info]).

solved the problem.

What is the difference between these two ways of setting compilation option, why one works and the other does not?
{code}