How to resolve File to Patch issue?

Question

We are trying to apply a patch to a core module using Applying patches after updating Drupal core to 8.5.6. When running patch -p1 < patchname-issuenum-version.patch command, we get the following.

We tried entering /core/modules/some/path/file.php but that did not work. I ran the command from the /core/modules/some/ directory, which is the module's root folder.

How do we resolve the File to Patch issue?

$ patch -p1 < patchname-issuenum-version.patch
(Stripping trailing CRs from patch; use --binary to disable.)
can't find file to patch at input line 5
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|diff --git a/core/modules/some/path/file.php b/core/modules/some/path/file.php
|index cb2e5754a..12354789 11111
|--- a/core/modules/some/path/file.php
|+++ b/core/modules/some/path/file.php
--------------------------
File to patch:

Answer 1

You need to run patch -p1 < patchname-issuenum-version.patch from the directory containing the core directory, not from core/mdoules/some/ or core/modules/some/. (I take core/mdoules/some/ is a typo in the question body.)

Patches for Drupal core are created from the Drupal root directory, so when you apply a Drupal patch, you need to change directory to that one.