shithub: libmujs

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strict mode: No automatic creation of global variables.

--- a/jsrun.c

+++ b/jsrun.c

@@ -802,6 +802,8 @@

 		}

 		E = E->outer;

 	} while (E);

+	if (J->strict)

+		js_referenceerror(J, "assignment to undeclared variable '%s'", name);

 	jsR_setproperty(J, J->G, name, stackidx(J, -1));

 }