Latent header-hygiene bug: crypter.h calls OPENSSL_cleanse at lines 99-100
but never declared the dependency. Built fine because the precompiled
header on triangles_common pulled in <openssl/crypto.h> transitively, so
every translation unit that included crypter.h also got the symbol.
Surfaced by enabling -DBUILD_TESTS=ON: test_triangles is configured
without REUSE_FROM the PCH, so test/sigopcount_tests.cpp fails to find
OPENSSL_cleanse when crypter.h is reached transitively via key.h/wallet.h.
Adding the explicit include is the principled fix — headers should
declare their own dependencies rather than rely on the consumer's
precompiled-header configuration.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>