diff --git a/src/dmd/dsymbolsem.d b/src/dmd/dsymbolsem.d
index 78638ada3a4d..c4ade7f94b0c 100644
--- a/src/dmd/dsymbolsem.d
+++ b/src/dmd/dsymbolsem.d
@@ -4488,7 +4488,6 @@ private extern(C++) final class DsymbolSemanticVisitor : Visitor
         }
         else if (cldec.symtab && !scx)
         {
-            cldec.semanticRun = PASS.semanticdone;
             return;
         }
         cldec.semanticRun = PASS.semantic;
diff --git a/test/compilable/test19656.sh b/test/compilable/test19656.sh
new file mode 100755
index 000000000000..84a5b5194154
--- /dev/null
+++ b/test/compilable/test19656.sh
@@ -0,0 +1,42 @@
+#! /usr/bin/env bash
+
+TEST_DIR=${OUTPUT_BASE}
+
+mkdir -p ${TEST_DIR}
+
+cat >${TEST_DIR}${SEP}test19656.d <<EOF
+import test19656a;
+import test19656c: Thud;
+class Foo
+{
+    Foo[Foo] _map;
+    void func (Thud ) { }
+    void thunk () { }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19656b.d <<EOF
+import test19656;
+class Bar { }
+class Qux(T): Foo
+{
+    override void thunk() { }
+}
+class Fred
+{
+    Qux!Bar _q;
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19656c.d <<EOF
+import test19656b;
+class Thud { }
+EOF
+
+cat >${TEST_DIR}${SEP}test19656a.d <<EOF
+import test19656;
+class Corge: Foo { }
+EOF
+
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}${TEST_NAME}.d
+rm -f ${TEST_DIR}${SEP}${TEST_NAME}${OBJ} ${TEST_DIR}${SEP}${TEST_NAME}*.d
diff --git a/test/compilable/test19657.sh b/test/compilable/test19657.sh
new file mode 100755
index 000000000000..93bed0c56d40
--- /dev/null
+++ b/test/compilable/test19657.sh
@@ -0,0 +1,57 @@
+#! /usr/bin/env bash
+
+TEST_DIR=${OUTPUT_BASE}
+
+mkdir -p ${TEST_DIR}
+
+cat >${TEST_DIR}${SEP}test19657a.d <<EOF
+import test19657c;
+import test19657e: Bar;
+class Foo {
+  int[Foo] _map;
+  bool func (Foo rhs, Bar bee) { return true; }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19657b.d <<EOF
+import test19657g;
+import test19657a;
+import test19657e;
+class Frop: Seq {
+  override bool func(Foo rhs, Bar bee) { return false; }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19657c.d <<EOF
+import test19657a;
+class Pol: Foo {}
+EOF
+
+cat >${TEST_DIR}${SEP}test19657d.d <<EOF
+import test19657a;
+class Trump: Foo {}
+EOF
+
+cat >${TEST_DIR}${SEP}test19657e.d <<EOF
+import test19657f;
+class Bar { }
+EOF
+
+cat >${TEST_DIR}${SEP}test19657f.d <<EOF
+class Baz {
+  import test19657d;
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19657g.d <<EOF
+import test19657d;
+class Seq: Trump {}
+EOF
+
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} \
+       ${TEST_DIR}${SEP}test19657a.d ${TEST_DIR}${SEP}test19657b.d \
+       ${TEST_DIR}${SEP}test19657c.d ${TEST_DIR}${SEP}test19657d.d \
+       ${TEST_DIR}${SEP}test19657e.d ${TEST_DIR}${SEP}test19657f.d \
+       ${TEST_DIR}${SEP}test19657g.d
+
+rm -f ${TEST_DIR}${SEP}${TEST_NAME}${OBJ} ${TEST_DIR}${SEP}${TEST_NAME}*.d
diff --git a/test/compilable/test19746.sh b/test/compilable/test19746.sh
new file mode 100755
index 000000000000..156605a049d3
--- /dev/null
+++ b/test/compilable/test19746.sh
@@ -0,0 +1,51 @@
+#! /usr/bin/env bash
+
+TEST_DIR=${OUTPUT_BASE}
+
+mkdir -p ${TEST_DIR}
+
+cat >${TEST_DIR}${SEP}test19746.d <<EOF
+import test19746c;
+import test19746b: Frop;
+template Base(T)
+{
+    static if (is(T == super)) alias Base = Object;
+}
+class Foo
+{
+    class Nested: Base!Foo { }
+    void func(Frop) { }
+    void thunk() { }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19746a.d <<EOF
+import test19746;
+class Bar: Foo { }
+EOF
+
+cat >${TEST_DIR}${SEP}test19746b.d <<EOF
+import test19746d;
+class Frop { }
+EOF
+
+cat >${TEST_DIR}${SEP}test19746c.d <<EOF
+import test19746a;
+class Qux: Bar { } 
+EOF
+
+cat >${TEST_DIR}${SEP}test19746d.d <<EOF
+import test19746;
+class Baz(T): Foo { }
+class Dap(T): Baz!T
+{
+    override void thunk() {}
+}
+class Zoo
+{
+    Dap!int _dap;
+}
+EOF
+
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}${TEST_NAME}.d
+rm -f ${TEST_DIR}${SEP}${TEST_NAME}${OBJ} ${TEST_DIR}${SEP}${TEST_NAME}*.d
diff --git a/test/compilable/test19750.sh b/test/compilable/test19750.sh
new file mode 100755
index 000000000000..1abecf3545e7
--- /dev/null
+++ b/test/compilable/test19750.sh
@@ -0,0 +1,42 @@
+#! /usr/bin/env bash
+
+TEST_DIR=${OUTPUT_BASE}
+
+mkdir -p ${TEST_DIR}
+
+cat >${TEST_DIR}${SEP}test19750.d <<EOF
+import test19750b;
+class Foo {
+  import test19750a;
+  void func (Bar ) {}
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19750a.d <<EOF
+import test19750c;
+class Bar {} 
+EOF
+
+cat >${TEST_DIR}${SEP}test19750b.d <<EOF
+import test19750d;
+class Frop {}
+EOF
+
+cat >${TEST_DIR}${SEP}test19750c.d <<EOF
+import test19750d;
+class Qux: Thud {
+  override void thunk() {}
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19750d.d <<EOF
+import test19750;
+class Dap(T) {}
+class Thud: Foo {
+  Dap!int _dap;
+  void thunk() { }
+}
+EOF
+
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}${TEST_NAME}.d
+rm -f ${TEST_DIR}${SEP}${TEST_NAME}${OBJ} ${TEST_DIR}${SEP}${TEST_NAME}*.d
diff --git a/test/runnable/test19655.sh b/test/runnable/test19655.sh
new file mode 100755
index 000000000000..ab70fde8ad11
--- /dev/null
+++ b/test/runnable/test19655.sh
@@ -0,0 +1,84 @@
+#! /usr/bin/env bash
+
+TEST_DIR=${OUTPUT_BASE}
+
+mkdir -p ${TEST_DIR}
+
+cat >${TEST_DIR}${SEP}test19655a.d <<EOF
+import test19655g;
+class Corge
+{ }
+EOF
+
+cat >${TEST_DIR}${SEP}test19655b.d <<EOF
+import test19655c;
+import test19655d;
+class Garply: Grault
+{ }
+void main()
+{
+    (new Garply).func;
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19655c.d <<EOF
+import test19655f;
+import test19655e;
+import test19655a: Corge;
+class Foo
+{
+    int[Foo] map;
+    void fun0(Corge) { }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19655d.d <<EOF
+import test19655f;
+import test19655g;
+class Grault: Bar
+{
+    void func()
+    {
+      func2;
+    }
+    void func1()
+    {
+        assert(false, "func1 was never called");
+    }
+    void func2() { }
+}
+EOF
+
+cat >${TEST_DIR}${SEP}test19655e.d <<EOF
+import test19655c;
+int[Foo] map;
+EOF
+
+cat >${TEST_DIR}${SEP}test19655f.d <<EOF
+import test19655c;
+import test19655g;
+EOF
+
+cat >${TEST_DIR}${SEP}test19655g.d <<EOF
+import test19655c;
+class Bar: Foo
+{ }
+EOF
+
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655a.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655b.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655c.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655d.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655e.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655f.d
+${DMD} -m${MODEL} -c -I${TEST_DIR} -od${TEST_DIR} ${TEST_DIR}${SEP}test19655g.d
+
+${DMD} -m${MODEL} -of${TEST_DIR}${SEP}test19655${EXE} ${TEST_DIR}${SEP}test19655a${OBJ} \
+       ${TEST_DIR}${SEP}test19655b${OBJ} ${TEST_DIR}${SEP}test19655c${OBJ} \
+       ${TEST_DIR}${SEP}test19655d${OBJ} ${TEST_DIR}${SEP}test19655e${OBJ} \
+       ${TEST_DIR}${SEP}test19655f${OBJ} ${TEST_DIR}${SEP}test19655g${OBJ}
+
+${TEST_DIR}${SEP}test19655${EXE}
+
+rm -f ${TEST_DIR}${SEP}test19655${EXE} ${TEST_DIR}${SEP}test19655*.d \
+   ${TEST_DIR}${SEP}test19655*${OBJ}