Fix incorrect line info computation (#4775)

zherczeg · web-flow · commit 35058cde3181 · 2021-09-22T12:35:24.000+02:00
JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
diff --git a/jerry-core/ecma/base/ecma-line-info.c b/jerry-core/ecma/base/ecma-line-info.c
@@ -139,13 +139,14 @@ ecma_line_info_get (uint8_t *line_info_p, /**< line info buffer */
 
     uint8_t *size_p = line_info_p + *line_info_p + (ECMA_LINE_INFO_STREAM_SIZE_MIN + 1);
 
-    end_offset += ecma_line_info_decode_vlq (&size_p);
+    uint32_t next_end_offset = end_offset + ecma_line_info_decode_vlq (&size_p);
 
-    if (offset < end_offset)
+    if (offset < next_end_offset)
     {
       break;
     }
 
+    end_offset = next_end_offset;
     line_info_p = size_p;
   }
 

Original file line number	Diff line number	Diff line change
`@@ -139,13 +139,14 @@ ecma_line_info_get (uint8_t line_info_p, /< line info buffer /`
`139`	`139`
`140`	`140`	`uint8_t size_p = line_info_p + line_info_p + (ECMA_LINE_INFO_STREAM_SIZE_MIN + 1);`
`141`	`141`
`142`		`- end_offset += ecma_line_info_decode_vlq (&size_p);`
	`142`	`+ uint32_t next_end_offset = end_offset + ecma_line_info_decode_vlq (&size_p);`
`143`	`143`
`144`		`- if (offset < end_offset)`
	`144`	`+ if (offset < next_end_offset)`
`145`	`145`	`{`
`146`	`146`	`break;`
`147`	`147`	`}`
`148`	`148`
	`149`	`+ end_offset = next_end_offset;`
`149`	`150`	`line_info_p = size_p;`
`150`	`151`	`}`
`151`	`152`