From 2d18c3734184d1aba98726c370615259ac700a01 Mon Sep 17 00:00:00 2001
From: Henry Cox <henry.cox@mediatek.com>
Date: Fri, 27 Feb 2026 13:51:21 -0500
Subject: [PATCH] Bugfix:  check for non-esistent file (see #450)

Signed-off-by:  Henry Cox <henry.cox@mediatek.com>
---
 lib/lcovutil.pm | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/lcovutil.pm b/lib/lcovutil.pm
index 83295fe4..7f55c4ff 100644
--- a/lib/lcovutil.pm
+++ b/lib/lcovutil.pm
@@ -1331,7 +1331,14 @@ sub read_config($$)
 
     my $set_value = 0;
     info(1, "read_config: $filename\n");
-    if (exists($included_config_files{abs_path($filename)})) {
+    my $path = abs_path($filename);
+    if (!defined($path)) {
+        lcovutil::ignorable_error($lcovutil::ERROR_USAGE,
+                                  "config file '$filename' does not exist");
+        # as below - this line is unreachable because we can't ignore
+        # the message due to order of processing - see below.
+        return 0;    # LCOV_UNREACHABLE_LINE
+    } elsif (exists($included_config_files{$path})) {
         lcovutil::ignorable_error($lcovutil::ERROR_USAGE,
                                   'config file inclusion loop detected: "' .
                                       join('" -> "', @include_stack) .
@@ -1353,7 +1360,7 @@ sub read_config($$)
         #   described above.
         return 0;    # didn't set anything LCOV_UNREACHABLE_LINE
     }
-    $included_config_files{abs_path($filename)} = 1;
+    $included_config_files{$path} = 1;
     push(@include_stack, $filename);
     VAR: while (<HANDLE>) {
         chomp;
@@ -1407,7 +1414,7 @@ sub read_config($$)
         }
     }
     close(HANDLE) or die("unable to close $filename: $!\n");
-    delete $included_config_files{abs_path($filename)};
+    delete $included_config_files{$path};
     pop(@include_stack);
     return $set_value;
 }