From fa6af856341384e4a84c5674e66fe7c1f13dd73c Mon Sep 17 00:00:00 2001
From: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
Date: Mon, 16 Feb 2026 14:54:50 +0100
Subject: [PATCH] refactor: Use static_cast<decltype(...)> to suppress integer
 sanitizer warning

This refactor does not change any behavior, except for the integer
sanitizer warning.

Can be tested via:

UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" ./bld-cmake/bin/bitcoin-cli -stdinrpcpass uptime
---
 src/compat/stdin.cpp              | 2 +-
 test/sanitizer_suppressions/ubsan | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/compat/stdin.cpp b/src/compat/stdin.cpp
index 0579f64aecf..10c811ad380 100644
--- a/src/compat/stdin.cpp
+++ b/src/compat/stdin.cpp
@@ -43,7 +43,7 @@ void SetStdinEcho(bool enable)
         return;
     }
     if (!enable) {
-        tty.c_lflag &= ~ECHO;
+        tty.c_lflag &= static_cast<decltype(tty.c_lflag)>(~ECHO);
     } else {
         tty.c_lflag |= ECHO;
     }
diff --git a/test/sanitizer_suppressions/ubsan b/test/sanitizer_suppressions/ubsan
index 0151f9d0253..ad604e6357b 100644
--- a/test/sanitizer_suppressions/ubsan
+++ b/test/sanitizer_suppressions/ubsan
@@ -55,7 +55,6 @@ unsigned-integer-overflow:TxConfirmStats::EstimateMedianVal
 unsigned-integer-overflow:InsecureRandomContext::rand64
 unsigned-integer-overflow:InsecureRandomContext::SplitMix64
 unsigned-integer-overflow:bitset_detail::PopCount
-implicit-integer-sign-change:SetStdinEcho
 implicit-integer-sign-change:compressor.h
 implicit-integer-sign-change:crypto/
 implicit-integer-sign-change:TxConfirmStats::removeTx