creating a morphism of the lie algebra gl_n enters (probably infinite) recursion

[DolphinTechCodes]

Steps To Reproduce

I try to create a morphism from the lie algebra gl(n). This however results in a RecursionError.
This is the simplest example to recreate the behavior:

from sage.all import *
gl = lie_algebras.gl(QQ, 2)
gl.morphism({e:e for e in gl.gens()})

Expected Behavior

I expect this example to return an identity morphism.

Actual Behavior

Instead of returning a morphism, sage enters a probably infinite recursion and eventually throws an RecursionError.

Additional Information

No response

Environment

• OS: Ubuntu
• Sage Version: 10.5

Checklist

• I have searched the existing issues for a bug report that matches the one I want to file, without success.
• I have read the documentation and troubleshoot guide

[fchapoton]

part of the infinite loop:

File ~/sage/src/sage/algebras/lie_algebras/lie_algebra.py:1246, in LieAlgebraFromAssociative._element_constructor_(self, x)
   1244 if isinstance(x, list) and len(x) == 2:
   1245     return self(x[0])._bracket_(self(x[1]))
-> 1246 return self.element_class(self, self._assoc(x))

[cxzhong]

Fixed it now, it leaks a base case in the construct function