[git commit] ash: fix handling of bashism $'xxx' with high-bit chars. Closes 9236

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=244fdd45c798477d6ee2e221a8c2473647b402d6
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 shell/ash.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/shell/ash.c b/shell/ash.c
index a885514..d96e568 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -11229,6 +11229,9 @@ readtoken1(int c, int syntax, char *eofmark, int striptabs)
 				c = decode_dollar_squote();
 				if (c & 0x100) {
 					USTPUTC('\\', out);
+					if (eofmark == NULL || dblquote)
+						/* Or else this SEGVs: $'\<0x82>' */
+						USTPUTC(CTLESC, out);
 					c = (unsigned char)c;
 				}
 			}