parser: Fix double-backslash nl in old-style command sub

When handling backslashes within an old-style command substitution,
we should not call pgetc_eatbnl because that would treat the next
backslash character as another escape character if it was then
followed by a new-line.

This patch fixes it by calling pgetc.

Reported-by: Matt Whitlock <dash@mattwhitlock.name>
Fixes: 6bbc71d84bea ("parser: use pgetc_eatbnl() in more places")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/parser.c b/src/parser.c
index 54c2861..a47022e 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -1393,7 +1393,7 @@ parsebackq: {
 				goto done;
 
 			case '\\':
-                                pc = pgetc_eatbnl();
+                                pc = pgetc();
                                 if (pc != '\\' && pc != '`' && pc != '$'
                                     && (!synstack->dblquote || pc != '"'))
                                         STPUTC('\\', pout);