Assertion violation at src/smt/smt_internalizer.cpp:1045

[wintered]

[670] % z3 small.smt2
ASSERTION VIOLATION
File: ../src/smt/smt_internalizer.cpp
Line: 1045
b_internalized(n)
(C)ontinue, (A)bort, (S)top, (T)hrow exception, Invoke (G)DB
a
[671] % 
[671] % z3release small.smt2
unsat
[672] % z3san small.smt2
=================================================================
==21960==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60300001fd32 at pc 0x564e6388e966 bp 0x7fff18702260 sp 0x7fff18702250
READ of size 1 at 0x60300001fd32 thread T0
  #0 0x564e6388e965 in smt::context::get_lit_assignment(unsigned int) const ../src/smt/smt_context.h:362
  #1 0x564e6388e965 in smt::context::get_assignment(smt::literal) const ../src/smt/smt_context.h:366
  #2 0x564e6388e965 in smt::context::assign(smt::literal, smt::b_justification const&, bool) ../src/smt/smt_context.h:946
  #3 0x564e638b0ffc in smt::context::init_assumptions(ref_vector<expr, ast_manager> const&) ../src/smt/smt_context.cpp:3217
  #4 0x564e638bcc81 in smt::context::check(unsigned int, expr* const*, bool) ../src/smt/smt_context.cpp:3482
  #5 0x564e6500d2b7 in solver_na2as::check_sat_core(unsigned int, expr* const*) ../src/solver/solver_na2as.cpp:67
  #6 0x564e64fca8d3 in combined_solver::check_sat_core(unsigned int, expr* const*) ../src/solver/combined_solver.cpp:213
  #7 0x564e64fabdb1 in solver::check_sat(unsigned int, expr* const*) ../src/solver/solver.cpp:330
  #8 0x564e64f06e10 in cmd_context::check_sat(unsigned int, expr* const*) ../src/cmd_context/cmd_context.cpp:1551
  #9 0x564e64e4a5f3 in smt2::parser::parse_check_sat_assuming() ../src/parsers/smt2/smt2parser.cpp:2609
  #10 0x564e64e4df27 in smt2::parser::parse_cmd() ../src/parsers/smt2/smt2parser.cpp:2982
  #11 0x564e64e4df27 in smt2::parser::operator()() ../src/parsers/smt2/smt2parser.cpp:3130
  #12 0x564e64e04fa5 in parse_smt2_commands(cmd_context&, std::istream&, bool, params_ref const&, char const*) ../src/parsers/smt2/smt2parser.cpp:3179
  #13 0x564e624c5426 in read_smtlib2_commands(char const*) ../src/shell/smtlib_frontend.cpp:89
  #14 0x564e6249df2e in main ../src/shell/main.cpp:352
  #15 0x7f4bfd711b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
  #16 0x564e624b1a99 in _start (z3san/build-04132020190805-0f69783/z3+0x1f6a99)
...
==21960==ABORTING
[673] % 
[673] % cat small.smt2
(check-sat-assuming (or true))
[674] %

OS: Ubuntu 18.04
Commit: 0f69783