bc: fix comment handling

function                                             old     new   delta
bc_vm_run                                            514     513      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 17 insertions, 2 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 9c7e69fc1..dc9a7da8e 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -7088,10 +7088,13 @@ static BC_STATUS zbc_vm_stdin(void)
                                 string++;
                                 if (c == '/' && *string == '*') {
                                         comment = true;
-                                        break;
+                                        string++;
+                                        continue;
                                 }
-                                if (c == '*' && *string == '/')
+                                if (c == '*' && *string == '/') {
                                         comment = false;
+                                        string++;
+                                }
                         }
                         if (str || comment || string[-2] == '\\') {
                                 bc_vec_concat(&buffer, buf.v);
diff --git a/testsuite/bc.tests b/testsuite/bc.tests
index 32460092b..4f0d50f73 100755
--- a/testsuite/bc.tests
+++ b/testsuite/bc.tests
@@ -4,6 +4,18 @@
 
 . ./testing.sh
 
+# testing "test name" "command" "expected result" "file input" "stdin"
+
+testing "bc comment 1" \
+        "bc" \
+        "3\n" \
+        "" "1 /* comment */ + 2"
+
+testing "bc comment 2: /*/ is not a closed comment" \
+        "bc" \
+        "4\n" \
+        "" "1 /*/ + 2 */ + 3"
+
 tar xJf bc_large.tar.xz
 
 for f in bc*.bc; do