diff --git a/sandbox.go b/sandbox.go
index 9b80f78..5988085 100644
--- a/sandbox.go
+++ b/sandbox.go
@@ -42,8 +42,9 @@
 	progName = "prog.go"
 )
 
-// Runtime error strings that will not be cached if found in an Event message.
-var nonCachingRuntimeErrors = []string{"out of memory", "cannot allocate memory"}
+// Responses that contain these strings will not be cached due to
+// their non-deterministic nature.
+var nonCachingErrors = []string{"out of memory", "cannot allocate memory"}
 
 type request struct {
 	Body string
@@ -94,11 +95,18 @@
 				http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
 				return
 			}
+			for _, e := range nonCachingErrors {
+				if strings.Contains(resp.Errors, e) {
+					s.log.Errorf("cmdFunc compilation error: %q", resp.Errors)
+					http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+					return
+				}
+			}
 			for _, el := range resp.Events {
 				if el.Kind != "stderr" {
 					continue
 				}
-				for _, e := range nonCachingRuntimeErrors {
+				for _, e := range nonCachingErrors {
 					if strings.Contains(el.Message, e) {
 						s.log.Errorf("cmdFunc runtime error: %q", el.Message)
 						http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
diff --git a/server_test.go b/server_test.go
index 34c8c26..4ff2f03 100644
--- a/server_test.go
+++ b/server_test.go
@@ -175,6 +175,12 @@
 		if r.Body == "allocate-memory-error" {
 			return &response{Events: []Event{{"cannot allocate memory", "stderr", 0}}}, nil
 		}
+		if r.Body == "oom-compile-error" {
+			return &response{Errors: "out of memory"}, nil
+		}
+		if r.Body == "allocate-memory-compile-error" {
+			return &response{Errors: "cannot allocate memory"}, nil
+		}
 		resp := &response{Events: []Event{{r.Body, "stdout", 0}}}
 		return resp, nil
 	})
@@ -204,6 +210,10 @@
 			[]byte(`{"Body":"oom-error"}`), nil},
 		{"Cannot allocate memory error in response body event message", http.MethodPost, http.StatusInternalServerError,
 			[]byte(`{"Body":"allocate-memory-error"}`), nil},
+		{"Out of memory error in response errors", http.MethodPost, http.StatusInternalServerError,
+			[]byte(`{"Body":"oom-compile-error"}`), nil},
+		{"Cannot allocate memory error in response errors", http.MethodPost, http.StatusInternalServerError,
+			[]byte(`{"Body":"allocate-memory-compile-error"}`), nil},
 	}
 
 	for _, tc := range testCases {