1
2	#### Locals don't leak
3	f() {
4	local f_var=f_var
5	}
6	f
7	echo $f_var
8	## stdout:
9
10	#### Globals leak
11	f() {
12	f_var=f_var
13	}
14	f
15	echo $f_var
16	## stdout: f_var
17
18	#### Return statement
19	f() {
20	echo one
21	return 42
22	echo two
23	}
24	f
25	## stdout: one
26	## status: 42
27
28	#### Dynamic Scope
29	f() {
30	echo $g_var
31	}
32	g() {
33	local g_var=g_var
34	f
35	}
36	g
37	## stdout: g_var
38
39	#### Dynamic Scope Mutation (wow this is bad)
40	f() {
41	g_var=f_mutation
42	}
43	g() {
44	local g_var=g_var
45	echo "g_var=$g_var"
46	f
47	echo "g_var=$g_var"
48	}
49	g
50	echo g_var=$g_var
51	## STDOUT:
52	g_var=g_var
53	g_var=f_mutation
54	g_var=
55	## END
56
57	#### Assign local separately
58	f() {
59	local f
60	f='new-value'
61	echo "[$f]"
62	}
63	f
64	## stdout: [new-value]
65	## status: 0
66
67	#### Assign a local and global on same line
68	myglobal=
69	f() {
70	local mylocal
71	mylocal=L myglobal=G
72	echo "[$mylocal $myglobal]"
73	}
74	f
75	echo "[$mylocal $myglobal]"
76	## stdout-json: "[L G]\n[ G]\n"
77	## status: 0
78
79	#### Return without args gives previous
80	f() {
81	( exit 42 )
82	return
83	}
84	f
85	echo status=$?
86	## STDOUT:
87	status=42
88	## END
89
90	#### return "" (a lot of disagreement)
91	f() {
92	echo f
93	return ""
94	}
95
96	f
97	echo status=$?
98	## STDOUT:
99	f
100	status=0
101	## END
102	## status: 0
103
104	## OK dash status: 2
105	## OK dash STDOUT:
106	f
107	## END
108
109	## BUG mksh STDOUT:
110	f
111	status=1
112	## END
113
114	## BUG bash STDOUT:
115	f
116	status=2
117	## END
118
119	#### return $empty
120	f() {
121	echo f
122	empty=
123	return $empty
124	}
125
126	f
127	echo status=$?
128	## STDOUT:
129	f
130	status=0
131	## END
132
133	#### Subshell function
134
135	f() ( return 42; )
136	# BUG: OSH raises invalid control flow! I think we should just allow 'return'
137	# but maybe not 'break' etc.
138	g() ( return 42 )
139	# bash warns here but doesn't cause an error
140	# g() ( break )
141
142	f
143	echo status=$?
144	g
145	echo status=$?
146
147	## STDOUT:
148	status=42
149	status=42
150	## END