From 0729b8c9e384851dff283319f94acb14bfa9eaee Mon Sep 17 00:00:00 2001
From: firewave <firewave@users.noreply.github.com>
Date: Mon, 20 Apr 2026 10:51:08 +0200
Subject: [PATCH] fixed #14675 - provide proper error ID for
 `simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND`

---
 lib/preprocessor.cpp   |   4 +-
 test/cli/other_test.py | 130 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+), 1 deletion(-)

diff --git a/lib/preprocessor.cpp b/lib/preprocessor.cpp
index 9528360906e..273d8df6123 100644
--- a/lib/preprocessor.cpp
+++ b/lib/preprocessor.cpp
@@ -997,8 +997,9 @@ static std::string simplecppErrToId(simplecpp::Output::Type type)
         return "includeNestedTooDeeply";
     case simplecpp::Output::FILE_NOT_FOUND:
         return "missingFile";
-    // should never occur
     case simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND:
+        return "missingIncludeExplicit";
+    // should never occur
     case simplecpp::Output::DUI_ERROR:
     // handled separately
     case simplecpp::Output::MISSING_HEADER:
@@ -1074,6 +1075,7 @@ void Preprocessor::getErrorMessages(ErrorLogger &errorLogger, const Settings &se
     preprocessor.error(loc, "message", simplecpp::Output::UNHANDLED_CHAR_ERROR);
     preprocessor.error(loc, "message", simplecpp::Output::INCLUDE_NESTED_TOO_DEEPLY);
     preprocessor.error(loc, "message", simplecpp::Output::FILE_NOT_FOUND);
+    preprocessor.error(loc, "message", simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND);
     preprocessor.invalidSuppression(loc, "message");
 }
 
diff --git a/test/cli/other_test.py b/test/cli/other_test.py
index 5c06bd07a94..e28a7305ce9 100644
--- a/test/cli/other_test.py
+++ b/test/cli/other_test.py
@@ -4427,3 +4427,133 @@ def test_inline_block_suppr_builddir_twice(tmp_path):
         assert exitcode == 0
         assert stdout == ''
         assert stderr == ''
+
+
+def test_dui_include(tmp_path):
+    test_file = tmp_path / 'test.c'
+    with open(test_file, "w") as f:
+        f.write('void f() {}')
+
+    inc_file = tmp_path / 'inc.h'
+    with open(inc_file, "w") as f:
+        f.write(
+"""
+void f_i()
+{
+    (void)(*((int*)0));
+}
+""")
+
+    args = [
+        '-q',
+        '--template=simple',
+        f'--include={inc_file}',
+        str(test_file)
+    ]
+
+    exitcode, stdout, stderr = cppcheck(args)
+    assert exitcode == 0
+    assert stdout == ''
+    assert stderr.splitlines() == [
+        f'{inc_file}:4:14: error: Null pointer dereference: (int*)0 [nullPointer]'
+    ]
+
+
+def test_dui_include_missing(tmp_path):  # #14675
+    test_file = tmp_path / 'test.c'
+    with open(test_file, "w") as f:
+        f.write('void f() {}')
+
+    args = [
+        '-q',
+        '--template=simple',
+        '--include=missing.h',
+        str(test_file)
+    ]
+
+    exitcode, stdout, stderr = cppcheck(args)
+    assert exitcode == 0
+    assert stdout == ''
+    assert stderr.splitlines() == [
+        f"{test_file}:0:0: error: Can not open include file 'missing.h' that is explicitly included. [missingIncludeExplicit]"
+    ]
+
+
+def test_dui_include_relative(tmp_path):
+    test_file = tmp_path / 'test.c'
+    with open(test_file, "w") as f:
+        f.write('void f() {}')
+
+    inc_file = tmp_path / 'inc.h'
+    with open(inc_file, "w") as f:
+        f.write(
+"""
+void f_i()
+{
+    (void)(*((int*)0));
+}
+""")
+
+    args = [
+        '-q',
+        '--template=simple',
+        '--include=inc.h',
+        str(test_file)
+    ]
+
+    exitcode, stdout, stderr = cppcheck(args, cwd=tmp_path)
+    assert exitcode == 0
+    assert stdout == ''
+    assert stderr.splitlines() == [
+        'inc.h:4:14: error: Null pointer dereference: (int*)0 [nullPointer]'
+    ]
+
+
+def test_dui_include_relative_missing(tmp_path):
+    test_file = tmp_path / 'test.c'
+    with open(test_file, "w") as f:
+        f.write('void f() {}')
+
+    inc_file = tmp_path / 'inc.h'
+    with open(inc_file, "w") as f:
+        f.write(
+"""
+void f_i()
+{
+    (void)(*((int*)0));
+}
+""")
+
+    args = [
+        '-q',
+        '--template=simple',
+        '--include=inc.h',
+        str(test_file)
+    ]
+
+    exitcode, stdout, stderr = cppcheck(args,)
+    assert exitcode == 0
+    assert stdout == ''
+    assert stderr.splitlines() == [
+        f"{test_file}:0:0: error: Can not open include file 'inc.h' that is explicitly included. [missingIncludeExplicit]"
+    ]
+
+
+def test_dui_include_absolute_missing(tmp_path):  # #14675
+    test_file = tmp_path / 'test.c'
+    with open(test_file, "w") as f:
+        f.write('void f() {}')
+
+    args = [
+        '-q',
+        '--template=simple',
+        '--include=/share/include/missing.h',
+        str(test_file)
+    ]
+
+    exitcode, stdout, stderr = cppcheck(args)
+    assert exitcode == 0
+    assert stdout == ''
+    assert stderr.splitlines() == [
+        f"{test_file}:0:0: error: Can not open include file '/share/include/missing.h' that is explicitly included. [missingIncludeExplicit]"
+    ]
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