Fails to build with GCC-11 (C++17 default)

[a17r]

In file included from src/fingerprint/Fingerprint.cpp:21:
src/fingerprint/Fingerprint.h:74:49: error: ISO C++17 does not allow dynamic exception specifications
   74 |         void generate( FingerprintableSource* ) throw( Error );
      |                                                 ^~~~~
src/fingerprint/Fingerprint.h:85:86: error: ISO C++17 does not allow dynamic exception specifications
   85 |         void decode( QNetworkReply*, bool* lastfm_needs_a_complete_fingerprint = 0 ) throw( Error );
      |                                                                                      ^~~~~
src/fingerprint/Fingerprint.cpp:97:60: error: ISO C++17 does not allow dynamic exception specifications
   97 | lastfm::Fingerprint::generate( FingerprintableSource* ms ) throw( Error )
      |                                                            ^~~~~
src/fingerprint/Fingerprint.cpp:309:91: error: ISO C++17 does not allow dynamic exception specifications
  309 | lastfm::Fingerprint::decode( QNetworkReply* reply, bool* complete_fingerprint_requested ) throw( Error )
      |                                                                                           ^~~~~

Downstream report: https://bugs.gentoo.org/787128