qffd assertion violation at ../src/ast/rewriter/expr_safe_replace.cpp Line: 27

[muchang]

Hi,
For this formula:

(declare-fun x () Real)
(assert (= x 0.0))
(check-sat-using qffd)

Z3 throws out an assertion violation:

ASSERTION VIOLATION
File: ../src/ast/rewriter/expr_safe_replace.cpp
Line: 27
m.get_sort(src) == m.get_sort(dst)
(C)ontinue, (A)bort, (S)top, (T)hrow exception, Invoke (G)DB

Replacing Real to Int or 0.0 to 0 makes the crash disappear.

OS: Ubuntu 18.04
Commit: c71da17