1
2	#### echo keyword
3	echo done
4	## stdout: done
5
6	#### if/else
7	if false; then
8	echo THEN
9	else
10	echo ELSE
11	fi
12	## stdout: ELSE
13
14	#### Turn an array into an integer.
15	a=(1 2 3)
16	(( a = 42 ))
17	echo $a
18	## stdout: 42
19	## N-I dash/ash stdout-json: ""
20	## N-I dash/ash status: 2
21
22
23	#### assign readonly -- one line
24	readonly x=1; x=2; echo hi
25	## status: 1
26	## OK dash/mksh/ash status: 2
27	## STDOUT:
28	## END
29
30	#### assign readonly -- multiple lines
31	readonly x=1
32	x=2
33	echo hi
34	## status: 1
35	## OK dash/mksh/ash status: 2
36	## STDOUT:
37	## END
38	## BUG bash status: 0
39	## BUG bash STDOUT:
40	hi
41	## END
42
43	#### assign readonly -- multiple lines -- set -o posix
44	set -o posix
45	readonly x=1
46	x=2
47	echo hi
48	## status: 1
49	## OK dash/mksh/ash status: 2
50	## STDOUT:
51	## END
52
53	#### unset readonly -- one line
54	readonly x=1; unset x; echo hi
55	## STDOUT:
56	hi
57	## END
58	## OK dash/ash status: 2
59	## OK zsh status: 1
60	## OK dash/ash stdout-json: ""
61	## OK zsh stdout-json: ""
62
63	#### unset readonly -- multiple lines
64	readonly x=1
65	unset x
66	echo hi
67	## OK dash/ash status: 2
68	## OK zsh status: 1
69	## OK dash/ash stdout-json: ""
70	## OK zsh stdout-json: ""
71
72	#### First word like foo$x() and foo$[1+2] (regression)
73
74	# Problem: $x() func call broke this error message
75	foo$identity('z')
76
77	foo$[1+2]
78
79	echo DONE
80
81	## status: 2
82	## OK mksh/zsh status: 1
83	## STDOUT:
84	## END
85	## OK osh status: 0
86	## OK osh STDOUT:
87	DONE
88	## END
89
90	#### Function names
91	foo$x() {
92	echo hi
93	}
94
95	foo $x() {
96	echo hi
97	}
98
99	## status: 2
100	## OK mksh/zsh/osh status: 1
101	## BUG zsh status: 0
102	## STDOUT:
103	## END
104
105
106	#### file with NUL byte
107	echo -e 'echo one \0 echo two' > tmp.sh
108	$SH tmp.sh
109	## STDOUT:
110	one echo two
111	## END
112	## OK osh STDOUT:
113	one
114	## END
115	## N-I dash stdout-json: ""
116	## N-I dash status: 127
117	## OK bash stdout-json: ""
118	## OK bash status: 126
119	## OK zsh stdout-json: "one \u0000echo two\n"
120
121	#### fastlex: PS1 format string that's incomplete / with NUL byte
122	case $SH in bash) exit ;; esac
123
124	x=$'\\D{%H:%M' # leave off trailing }
125	echo x=${x@P}
126
127	## STDOUT:
128	x=\D{%H:%M
129	## END
130
131	## bash just ignores the missing }
132	## BUG bash stdout-json: ""
133
134	# These shells don't understand @P
135
136	## N-I dash/ash stdout-json: ""
137	## N-I dash/ash status: 2
138
139	## N-I zsh stdout-json: ""
140	## N-I zsh status: 1
141
142
143	#### 'echo' and printf to disk full
144
145	# Inspired by https://blog.sunfishcode.online/bugs-in-hello-world/
146
147	echo hi > /dev/full
148	echo status=$?
149	printf '%s\n' hi > /dev/full
150	echo status=$?
151
152	## STDOUT:
153	status=1
154	status=1
155	## END