Merge remote-tracking branch 'origin/topic/awelzel/3640-void-size-expr-assign-stmt'

* origin/topic/awelzel/3640-void-size-expr-assign-stmt:
  Expr: Handle TYPE_VOID in SizeExpr and AssignExpr::Typecheck()

testing/btest/Baseline/language.void-errors-2/output

@@ -0,0 +1,2 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 2: identifier not defined: void

testing/btest/Baseline/language.void-errors-3/output

@@ -0,0 +1,2 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 1: identifier not defined: void

testing/btest/Baseline/language.void-errors-4/output

@@ -0,0 +1,2 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 2: return statement cannot have an expression (return (a))

testing/btest/Baseline/language.void-errors-5/output

@@ -0,0 +1,2 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 4: cannot take size of void (sizeofx[3.4.5.6])

testing/btest/Baseline/language.void-errors-6/output

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+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 2: can't assign void value (y = x[3])

testing/btest/Baseline/language.void-errors-7/output

@@ -0,0 +1,4 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 5: can't assign void value (z = x())
+error in <...>/void-errors.zeek, line 6: value of type void illegal (print x())
+error in <...>/void-errors.zeek, line 7: cannot take size of void (sizeofx())

testing/btest/Baseline/language.void-errors/output

@@ -0,0 +1,2 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+error in <...>/void-errors.zeek, line 7: identifier not defined: void

testing/btest/language/void-errors.zeek

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+# @TEST-DOC: Zeek does not have a script land void type, but internally it does exist (indexing a set, or a function returning no result). Regression test #3640.
+#
+# @TEST-EXEC-FAIL: zeek -b %INPUT >output 2>&1
+# @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff output
+
+# identifier void not defined...
+global x: void = 1;
+
+# @TEST-START-NEXT
+type R: record {
+	x: void;
+};
+
+
+# @TEST-START-NEXT
+function x(): void {
+	return "a";
+};
+
+# @TEST-START-NEXT
+function x() {
+	return "a";
+};
+
+# @TEST-START-NEXT
+
+global x = set(3.4.5.6, 9.8.7.6);
+print |x|;
+print |x[3.4.5.6]|;
+
+# @TEST-START-NEXT
+local x = set(5, 3);
+local y: any = x[3];
+print y;
+
+# @TEST-START-NEXT
+function x() {
+	print "x()";
+}
+
+global z: any = x();
+print x();
+print |x()|;