From 31f6bd4b86657ada74f1b7397d55c0df0b299acf Mon Sep 17 00:00:00 2001 From: whitequark Date: Sun, 6 Oct 2019 08:52:49 +0000 Subject: [PATCH] back.rtlil: don't crash legalizing values with no branches. Fixes #239. --- nmigen/back/rtlil.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/nmigen/back/rtlil.py b/nmigen/back/rtlil.py index e962366..7dbe085 100644 --- a/nmigen/back/rtlil.py +++ b/nmigen/back/rtlil.py @@ -731,7 +731,8 @@ class _StatementCompiler(xfrm.StatementVisitor): src=src(legalize.src_loc)) as switch: width, signed = legalize.value.shape() tests = ["{:0{}b}".format(v, width) for v in legalize.branches] - tests[-1] = "-" * width + if tests: + tests[-1] = "-" * width for branch, test in zip(legalize.branches, tests): with self.case(switch, (test,)): self._wrap_assign = False -- 2.30.2