From 6fd3f0de2c083ddb8d96e09f62dc2285c3858378 Mon Sep 17 00:00:00 2001
From: Pat Marion <james.patrick.marion@gmail.com>
Date: Thu, 13 Nov 2025 15:49:24 -0500
Subject: [PATCH] Build regex from channel and not sub->channel.

The sub->channel is a shortened string clipped at ZCM_CHANNEL_MAXLEN=32
while channel is the full string.
---
 zcm/blocking.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zcm/blocking.cpp b/zcm/blocking.cpp
index eaddd0f4..83b2a4f1 100644
--- a/zcm/blocking.cpp
+++ b/zcm/blocking.cpp
@@ -489,7 +489,7 @@ zcm_sub_t* zcm_blocking_t::subscribe(const string& channel,
     sub->usr = usr;
     sub->regex = isRegexChannel(channel);
     if (sub->regex) {
-        sub->regexobj = (void*) new std::regex(sub->channel);
+        sub->regexobj = (void*) new std::regex(channel);
         ZCM_ASSERT(sub->regexobj);
         subsRegex[channel].push_back(sub);
     } else {