1 files changed, 10 insertions, 0 deletions
diff --git a/src/nvim/event/process.c b/src/nvim/event/process.c
index 7a8a39dbcf..990dee0c7f 100644
--- a/src/nvim/event/process.c
+++ b/src/nvim/event/process.c
@@ -26,6 +26,11 @@
 // For PTY processes SIGTERM is sent first (in case SIGHUP was not enough).
 #define KILL_TIMEOUT_MS 2000
 
+/// Externally defined with gcov.
+#ifdef USE_GCOV
+void __gcov_flush(void);
+#endif
+
 static bool process_is_tearing_down = false;
 
 /// @returns zero on success, or negative error code
@@ -50,6 +55,11 @@ int process_spawn(Process *proc, bool in, bool out, bool err)
     proc->err.closed = true;
   }
 
+#ifdef USE_GCOV
+  // Flush coverage data before forking, to avoid "Merge mismatch" errors.
+  __gcov_flush();
+#endif
+
   int status;
   switch (proc->type) {
     case kProcessTypeUv: