HPCC-35956 Improve the error reporting when cannot read enough data

ghalliday · ghalliday · commit 117c44901f6a · 2026-03-04T17:23:22.000Z
Signed-off-by: Gavin Halliday &lt;gavin.halliday@lexisnexis.com&gt;
diff --git a/rtl/eclrtl/rtlcommon.hpp b/rtl/eclrtl/rtlcommon.hpp
@@ -134,7 +134,8 @@ class ECLRTL_API CThorContiguousRowBuffer : public CContiguousRowBuffer, impleme
         if (required > maxAvailable())
         {
             peekBytesDirect(required);
-            assertex(required <= maxAvailable());
+            if (unlikely(required > maxAvailable()))
+                throw makeStringExceptionV(0, "Required %u bytes, but only %u available (offset %u)", required, (unsigned)maxAvailable(), readOffset);
         }
     }
 

Original file line number	Diff line number	Diff line change
`@@ -134,7 +134,8 @@ class ECLRTL_API CThorContiguousRowBuffer : public CContiguousRowBuffer, impleme`
`134`	`134`	`if (required > maxAvailable())`
`135`	`135`	`{`
`136`	`136`	`peekBytesDirect(required);`
`137`		`- assertex(required <= maxAvailable());`
	`137`	`+ if (unlikely(required > maxAvailable()))`
	`138`	`+ throw makeStringExceptionV(0, "Required %u bytes, but only %u available (offset %u)", required, (unsigned)maxAvailable(), readOffset);`
`138`	`139`	`}`
`139`	`140`	`}`
`140`	`141`