From: Robert Jordens <jordens@gmail.com>
Date: Sun, 17 Aug 2014 20:56:33 +0000 (-0600)
Subject: fhdl.structure: do not permit clock domain names that start with numbers
X-Git-Tag: 24jan2021_ls180~2099^2~317
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bd232f3f61b21c3b38dd0c6b6e1e4c507d18471e;p=litex.git

fhdl.structure: do not permit clock domain names that start with numbers
---

diff --git a/migen/fhdl/structure.py b/migen/fhdl/structure.py
index 4525266e..09342f54 100644
--- a/migen/fhdl/structure.py
+++ b/migen/fhdl/structure.py
@@ -511,8 +511,10 @@ class ClockDomain:
 		self.name = tracer.get_obj_var_name(name)
 		if self.name is None:
 			raise ValueError("Cannot extract clock domain name from code, need to specify.")
-		if len(self.name) > 3 and self.name[:3] == "cd_":
+		if self.name.startswith("cd_"):
 			self.name = self.name[3:]
+		if self.name[0].isdigit():
+			raise ValueError("Clock domain name cannot start with a number.")
 		self.clk = Signal(name_override=self.name + "_clk")
 		if reset_less:
 			self.rst = None