Created attachment 38862 [details]
Preprocessed pubkey_pkcs8 source file

I'm working on OS X 10.8.5 with MacPorts 2.3.4 installed. I'm attempting to compile Jack Lloyd's Botan (http://github.com/randombit/botan) with GCC 6.1 from the port. Botan is a C++ TLS library.

I don't have a minimal test case because I did not write the code. I'm hoping one of the GCC devs with C++/STL knowledge can spot the issue. Or maybe spot the bad interaction and craft a test case.

The MacPorts bug report is at https://trac.macports.org/ticket/51796. The MacPorts maintainers suggested to file the bug upstream.

**********

$ make
 ...

 /opt/local/bin/g++-mp-6  -m64 -pthread -fstack-protector -Wa,-q -fPIC
 -fvisibility=hidden -std=c++11 -D_REENTRANT -O3 -momit-leaf-frame-pointer
 -Wall -Wextra -Wpedantic -Wshadow -Wstrict-aliasing -Wstrict-overflow=5
 -Wcast-align -Wmissing-declarations -Wpointer-arith -Wcast-qual -Wzero-as-
 null-pointer-constant -Wnon-virtual-dtor -Ibuild/include -c
 ./src/lib/pubkey/pkcs8.cpp -o build/obj/lib/pubkey_pkcs8.o
 In file included from /opt/local/include/gcc6/c++/memory:79:0,
                  from build/include/botan/types.h:16,
                  from build/include/botan/mem_ops.h:11,
                  from build/include/botan/secmem.h:11,
                  from build/include/botan/pk_keys.h:11,
                  from build/include/botan/x509_key.h:11,
                  from build/include/botan/pkcs8.h:11,
                  from ./src/lib/pubkey/pkcs8.cpp:8:
 /opt/local/include/gcc6/c++/functional: In static member function 'static
 _Res std::_Function_handler<_Res(_ArgTypes ...),
 _Functor>::_M_invoke(const std::_Any_data&, _ArgTypes&& ...) [with _Res =
 std::__cxx11::basic_string<char>; _Functor =
 Botan::PKCS8::load_key(Botan::DataSource&,
 Botan::RandomNumberGenerator&)::<lambda()>; _ArgTypes = {}]':
 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 in assign_temp, at function.c:961
       std::forward<_ArgTypes>(__args)...);
                                         ^

 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 Abort trap: 6
 g++-mp-6: internal compiler error: Abort trap: 6 (program cc1plus)
 Please submit a full bug report,
 with preprocessed source if appropriate.
 See <https://trac.macports.org/newticket> for instructions.
 Makefile:1152: recipe for target 'build/obj/lib/pubkey_pkcs8.o' failed
 make: *** [build/obj/lib/pubkey_pkcs8.o] Error 4


*****

Here's Botan's configuration. Also note the configuration uses -Wa,-q, which means the Clang integrated assembler is used. I dont know if it makes a difference, but its mentioned for completeness.

 $ ./configure.py --os=darwin --cc=gcc --cpu=x86_64 --cc-
 bin=/opt/local/bin/g++-mp-6 --cc-abi-flags="-Wa,-q"
    INFO: Platform: OS="Darwin" machine="x86_64" proc="i386"
    INFO: Canonicalizized CPU target x86_64 to x86_64/x86_64
    INFO: Target is gcc-darwin-x86_64-x86_64
    INFO: Skipping, dependency failure - sessions_sqlite3
    INFO: Skipping, incompatible CPU - mp_x86_32 simd_altivec
    INFO: Skipping, incompatible OS - beos_stats cryptoapi_rng win32_stats
    INFO: Skipping, incompatible compiler - mp_x86_32_msvc
    INFO: Skipping, only used if needed or requested - dyn_load mp_generic
 simd_scalar
    INFO: Skipping, requires external dependency - boost bzip2 lzma openssl
 pkcs11 sqlite3 tpm zlib
    INFO: Using MP module mp_x86_64
    INFO: Using SIMD module simd_sse2
    INFO: Loading modules adler32 aead aes aes_ni aes_ssse3 aont asn1
 auto_rng base base64 bcrypt bigint blake2 block blowfish camellia cascade
 cast cbc cbc_mac ccm cfb chacha chacha20poly1305 clmul cmac codec_filt
 comb4p compression crc24 crc32 cryptobox ctr curve25519 darwin_secrandom
 datastor des dev_random dh dl_algo dl_group dlies dsa eax ec_gfp ec_group
 ecb ecc_key ecdh ecdsa ecgdsa ecies eckcdsa egd elgamal eme_oaep eme_pkcs1
 eme_raw emsa1 emsa_pkcs1 emsa_pssr emsa_raw emsa_x931 entropy fd_unix ffi
 filters fpe_fe1 gcm gost_28147 gost_3410 gost_3411 has160 hash hash_id hex
 hkdf hmac hmac_drbg hmac_rng hres_timer http_util idea idea_sse2 if_algo
 kasumi kdf kdf1 kdf1_iso18033 kdf2 keccak keypair lion locking_allocator
 mac mars mce mceies md2 md4 md5 mdx_hash mgf1 misty1 mode_pad modes mp
 mp_x86_64 noekeon noekeon_simd nr numbertheory ocb ofb oid_lookup openpgp
 par_hash passhash9 pbes2 pbkdf pbkdf1 pbkdf2 pem pk_pad poly1305 prf_tls
 prf_x942 proc_walk pubkey rc2 rc4 rc5 rc6 rdrand rdseed rfc3394 rfc6979
 rmd128 rmd160 rng rsa rw safer salsa20 seed serpent serpent_simd
 sessions_sql sha1 sha1_sse2 sha2_32 sha2_64 simd simd_sse2 siphash siv
 skein sp800_108 sp800_56c srp6 stream system_rng tea threefish
 threefish_avx2 tiger tls tss twofish unix_procs utils whirlpool x509
 x919_mac x931_rng xtea xtea_simd xts
    INFO: Assuming CPU is little endian
    INFO: Assuming unaligned memory access works
    INFO: Using symlink to link files into build dir (use --link-method to
 change)
    INFO: Botan 1.11.31 (unreleased undated) build setup is complete
 ...