1 files changed, 9 insertions, 1 deletions
diff --git a/src/script/api/qscriptcontextinfo.cpp b/src/script/api/qscriptcontextinfo.cpp
index 0f9de1d..182bc4a 100644
--- a/src/script/api/qscriptcontextinfo.cpp
+++ b/src/script/api/qscriptcontextinfo.cpp
@@ -159,12 +159,20 @@ QScriptContextInfoPrivate::QScriptContextInfoPrivate(const QScriptContext *conte
             JSC::CodeBlock *codeBlock = frame->codeBlock();
             if (returnPC && codeBlock && QScriptEnginePrivate::hasValidCodeBlockRegister(frame)) {
 #if ENABLE(JIT)
-                unsigned bytecodeOffset = codeBlock->getBytecodeIndex(frame, JSC::ReturnAddressPtr(returnPC));
+                JSC::JITCode code = codeBlock->getJITCode();
+                unsigned jitOffset = code.offsetOf(JSC::ReturnAddressPtr(returnPC).value());
+                // We can only use the JIT code offset if it's smaller than the JIT size;
+                // otherwise calling getBytecodeIndex() is meaningless.
+                if (jitOffset < code.size()) {
+                    unsigned bytecodeOffset = codeBlock->getBytecodeIndex(frame, JSC::ReturnAddressPtr(returnPC));
 #else
                 unsigned bytecodeOffset = returnPC - codeBlock->instructions().begin();
 #endif
                 bytecodeOffset--; //because returnPC is on the next instruction. We want the current one
                 lineNumber = codeBlock->lineNumberForBytecodeOffset(const_cast<JSC::ExecState *>(frame), bytecodeOffset);
+#if ENABLE(JIT)
+                }
+#endif
             }
         }
     }