[PATCH] fix backslash added incompatibility after previous patches

[Ricardo Giorni <ricardo@giorni.co>]

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After patch 42355, escaped backslashes on here-documents stopped working.

cat <<-HERE
	foo\\
	bar
HERE

Before patch 42355 (zsh 5.4), and on latest dash and bash:

foo\
bar

After:

foo\	bar

—
Ricardo

diff --git i/Src/exec.c w/Src/exec.c
index 1b622d56f..08789cc04 100644
--- i/Src/exec.c
+++ w/Src/exec.c
@@ -4427,16 +4427,16 @@ gethere(char **strp, int typ)
 		bptr = buf + bsiz;
 		bsiz *= 2;
 	    }
-	    if (lexstop)
+	    if (lexstop || c == '\n')
 		break;
-	    if (c == '\n') {
-		if (!qt && bptr > t && *(bptr - 1) == '\\') {
-		    /* line continuation */
+	    if (!qt && c == '\\') {
+		*bptr++ = c;
+		c = hgetc();
+		if (c == '\n') {
 		    bptr--;
 		    c = hgetc();
 		    continue;
-		} else
-		    break;
+		}
 	    }
 	    *bptr++ = c;
 	    c = hgetc();
diff --git i/Test/A04redirect.ztst w/Test/A04redirect.ztst
index b5b65cf5d..1e17dddd4 100644
--- i/Test/A04redirect.ztst
+++ w/Test/A04redirect.ztst
@@ -174,6 +174,30 @@
 >some	stuff
 >to  test
 >tab\stripping
+>Last line
+
+  heretest() {
+    print First line
+    cat <<-HERE
+	$foo\\
+	$foo
+	some\\ \
+	stuff
+	to\
+  test \\
+	more backslash craziness\\\\\\\\\
+	wild
+	HERE
+    print Last line
+  }
+  heretest
+0:No line continuation in here-document on escaped backslash
+>First line
+>bar\
+>bar
+>some\ 	stuff
+>to  test \
+>more backslash craziness\\\\	wild
 >Last line
 
   #




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