diff --git a/src/common/2d/v_2ddrawer.cpp b/src/common/2d/v_2ddrawer.cpp
index 1316dfa86..4de396962 100644
--- a/src/common/2d/v_2ddrawer.cpp
+++ b/src/common/2d/v_2ddrawer.cpp
@@ -138,7 +138,7 @@ IMPLEMENT_CLASS(DShape2D, false, false)
 
 static void Shape2D_SetTransform(DShape2D* self, DShape2DTransform *transform)
 {
-	self->transform = transform->transform;
+	self->transform = PARAM_NULLCHECK(transform, transform)->transform;
 }
 
 DEFINE_ACTION_FUNCTION_NATIVE(DShape2D, SetTransform, Shape2D_SetTransform)
diff --git a/src/common/engine/printf.h b/src/common/engine/printf.h
index 69d3e7d45..964d7dc85 100644
--- a/src/common/engine/printf.h
+++ b/src/common/engine/printf.h
@@ -75,8 +75,8 @@ enum
 };
 
 
-void I_Error(const char *fmt, ...) ATTRIBUTE((format(printf,1,2)));
-void I_FatalError(const char* fmt, ...) ATTRIBUTE((format(printf, 1, 2)));
+[[noreturn]] void I_Error(const char *fmt, ...) ATTRIBUTE((format(printf,1,2)));
+[[noreturn]] void I_FatalError(const char* fmt, ...) ATTRIBUTE((format(printf, 1, 2)));
 
 // This really could need some cleanup - the main problem is that it'd create
 // lots of potential for merge conflicts.
diff --git a/src/common/models/models_iqm.cpp b/src/common/models/models_iqm.cpp
index c883dee39..679e492a2 100644
--- a/src/common/models/models_iqm.cpp
+++ b/src/common/models/models_iqm.cpp
@@ -593,7 +593,7 @@ const TArray<VSMatrix> IQMModel::CalculateBones(int frame1, int frame2, double i
 
 	actor->boneComponentData->trsmatrix[index] = bones;
 
-	for (uint32_t j = 0; j < numbones; j++)
+	for (int j = 0; j < numbones; j++)
 	{
 		VSMatrix m;
 		m.loadMatrix(swapYZ);
diff --git a/src/common/scripting/vm/vm.h b/src/common/scripting/vm/vm.h
index 980f5b1d8..1ba1a3c34 100644
--- a/src/common/scripting/vm/vm.h
+++ b/src/common/scripting/vm/vm.h
@@ -110,8 +110,8 @@ public:
 };
 
 // This must be a separate function because the VC compiler would otherwise allocate memory on the stack for every separate instance of the exception object that may get thrown.
-void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...);
-void ThrowAbortException(VMScriptFunction *sfunc, VMOP *line, EVMAbortException reason, const char *moreinfo, ...);
+[[noreturn]] void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...);
+[[noreturn]] void ThrowAbortException(VMScriptFunction *sfunc, VMOP *line, EVMAbortException reason, const char *moreinfo, ...);
 
 void ClearGlobalVMStack();
 
@@ -496,6 +496,7 @@ inline int VMCallAction(VMFunction *func, VMValue *params, int numparams, VMRetu
 
 // Use these to collect the parameters in a native function.
 // variable name <x> at position <p>
+[[noreturn]]
 void NullParam(const char *varname);
 
 #ifndef NDEBUG
diff --git a/src/common/scripting/vm/vmframe.cpp b/src/common/scripting/vm/vmframe.cpp
index 8a4b87458..69b47dfd5 100644
--- a/src/common/scripting/vm/vmframe.cpp
+++ b/src/common/scripting/vm/vmframe.cpp
@@ -688,14 +688,14 @@ void CVMAbortException::MaybePrintMessage()
 }
 
 
-void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...)
+[[noreturn]] void ThrowAbortException(EVMAbortException reason, const char *moreinfo, ...)
 {
 	va_list ap;
 	va_start(ap, moreinfo);
 	throw CVMAbortException(reason, moreinfo, ap);
 }
 
-void ThrowAbortException(VMScriptFunction *sfunc, VMOP *line, EVMAbortException reason, const char *moreinfo, ...)
+[[noreturn]] void ThrowAbortException(VMScriptFunction *sfunc, VMOP *line, EVMAbortException reason, const char *moreinfo, ...)
 {
 	va_list ap;
 	va_start(ap, moreinfo);
@@ -711,10 +711,9 @@ DEFINE_ACTION_FUNCTION(DObject, ThrowAbortException)
 	PARAM_PROLOGUE;
 	FString s = FStringFormat(VM_ARGS_NAMES);
 	ThrowAbortException(X_OTHER, s.GetChars());
-	return 0;
 }
 
-void NullParam(const char *varname)
+[[noreturn]] void NullParam(const char *varname)
 {
 	ThrowAbortException(X_READ_NIL, "In function parameter %s", varname);
 }
diff --git a/src/common/utility/engineerrors.cpp b/src/common/utility/engineerrors.cpp
index ccc459f72..1e2e2e82e 100644
--- a/src/common/utility/engineerrors.cpp
+++ b/src/common/utility/engineerrors.cpp
@@ -63,7 +63,7 @@ void I_DebugPrint(const char *cp)
 //
 //==========================================================================
 
-void I_Error(const char *error, ...)
+[[noreturn]] void I_Error(const char *error, ...)
 {
 	va_list argptr;
 	char errortext[MAX_ERRORTEXT];
@@ -85,7 +85,7 @@ void I_Error(const char *error, ...)
 //==========================================================================
 extern FILE *Logfile;
 
-void I_FatalError(const char *error, ...)
+[[noreturn]] void I_FatalError(const char *error, ...)
 {
 	static bool alreadyThrown = false;
 	gameisdead = true;
diff --git a/src/common/utility/engineerrors.h b/src/common/utility/engineerrors.h
index 36a755ade..18fe849bc 100644
--- a/src/common/utility/engineerrors.h
+++ b/src/common/utility/engineerrors.h
@@ -110,7 +110,7 @@ public:
 };
 
 void I_ShowFatalError(const char *message);
-void I_Error (const char *error, ...) GCCPRINTF(1,2);
-void I_FatalError (const char *error, ...) GCCPRINTF(1,2);
+[[noreturn]] void I_Error (const char *error, ...) GCCPRINTF(1,2);
+[[noreturn]] void I_FatalError (const char *error, ...) GCCPRINTF(1,2);
 
 #endif //__ERRORS_H__