Replace assert in get_reference with more useful error message

diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index 10cb039d5d720008ca6ac8bc61c46dd318c438b8..a747b9d3c8a13c784048b7d1abc451136b7ac4b5 100644 (file)
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -166,7 +166,8 @@ namespace RTLIL
                        log_assert(p[0] == '$' || p[0] == '\\');
                        log_assert(p[1] != 0);
                        for (const char *c = p; *c; c++)
-                               log_assert((unsigned)*c > (unsigned)' ');
+                               if ((unsigned)*c <= (unsigned)' ')
+                                       log_error("Found control character or space (0x%02hhx) in string '%s' which is not allowed in RTLIL identifiers\n", *c, p);
 
                #ifndef YOSYS_NO_IDS_REFCNT
                        if (global_free_idx_list_.empty()) {