Based on the issue description and hints provided, I have enough context to generate the fix. The problem is in `sympy/functions/elementary/complexes.py` in the `Abs.eval` method. The hints clearly explain:

1. The issue is around lines 616-621 where there's a conjugate check
2. The fix should add a check for `arg.is_extended_real` before computing the conjugate
3. The condition should also be changed from `if _arg != conj or _arg != -conj:` to `if _arg not in (conj, -conj):`

Here's the patch:

--- a/sympy/functions/elementary/complexes.py
+++ b/sympy/functions/elementary/complexes.py
@@ -612,6 +612,8 @@ class Abs(Function):
             return sqrt(expand_mul(arg*conj))
         if arg.is_imaginary:
             return abs(im(arg))
+        if arg.is_extended_real:
+            return
         if arg.is_Pow:
             base, exponent = arg.as_base_exp()
             if base.is_extended_real:
@@ -621,7 +623,7 @@ class Abs(Function):
                     return base**re(exponent)
         # More general case; avoid abs(re(arg)**2) recursion
         _arg = signsimp(arg, evaluate=False)
-        if _arg != conj or _arg != -conj:
+        if _arg not in (conj, -conj):
             return