patch 8.2.2758: Vim9: wrong line number for autoload function with wrong name Commit: https://github.com/vim/vim/commit/f48b2fa33cda94e963f6fa8b78f344385c9ebea6 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Apr 12 22:02:36 2021 +0200 patch 8.2.2758: Vim9: wrong line number for autoload function with wrong name Problem: Vim9: wrong line number for autoload function with wrong name. Solution: Set and restore SOURCING_LNUM. (closes https://github.com/vim/vim/issues/8100)

--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -4058,7 +4058,11 @@ define_function(exarg_T *eap, char_u *na
 	    }
 	    if (j == FAIL)
 	    {
+		linenr_T save_lnum = SOURCING_LNUM;
+
+		SOURCING_LNUM = sourcing_lnum_top;
 		semsg(_("E746: Function name does not match script file name: %s"), name);
+		SOURCING_LNUM = save_lnum;
 		goto erret;
 	    }
 	}