Don't abort if we get a signal while waiting for the pager

src/libmain/shared.cc

@@ -328,10 +328,14 @@ RunPager::RunPager()
 
 RunPager::~RunPager()
 {
-    if (pid != -1) {
-        std::cout.flush();
-        close(STDOUT_FILENO);
-        pid.wait(true);
+    try {
+        if (pid != -1) {
+            std::cout.flush();
+            close(STDOUT_FILENO);
+            pid.wait(true);
+        }
+    } catch (...) {
+        ignoreException();
     }
 }