fix Issue 14116 - Assertion failure: 'p->isPkgMod == PKGmodule' on li…

…ne 143 in file 'import.c'

src/import.c

@@ -139,7 +139,10 @@ void Import::load(Scope *sc)
                     if (!mod)
                         p->isPkgMod = PKGpackage;
                     else
-                        assert(p->isPkgMod == PKGmodule);
+                    {
+                        // mod is a package.d, or a normal module which conflicts with the package name.
+                        assert(mod->isPackageFile == (p->isPkgMod == PKGmodule));
+                    }
                 }
                 else
                 {

test/fail_compilation/ice14116.d

@@ -0,0 +1,11 @@
+// EXTRA_SOURCES: imports/a14116.d
+/*
+TEST_OUTPUT:
+---
+fail_compilation/imports/a14116.d(3): Error: module ice14116.ice14116 from file fail_compilation/ice14116.d must be imported with 'import ice14116.ice14116;'
+---
+*/
+
+module ice14116.ice14116;
+
+void foo() {}

test/fail_compilation/imports/a14116.d

@@ -0,0 +1,5 @@
+module ice14116.a14116;
+
+import ice14116;
+
+void main() {}