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-rw-r--r--passes/cmds/chformal.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/passes/cmds/chformal.cc b/passes/cmds/chformal.cc
index daed80354..a8c1fef85 100644
--- a/passes/cmds/chformal.cc
+++ b/passes/cmds/chformal.cc
@@ -71,7 +71,7 @@ struct ChformalPass : public Pass {
pool<IdString> constr_types;
char mode = 0;
- int mode_arg;
+ int mode_arg = 0;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)