From 0479db934c9412443aac5bf563e9dc4538eba7f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 26 May 2025 09:19:40 +0200
Subject: [PATCH] fetchGit: don't compute revCount on shallow repository

This can never work and leads to a crash bug.
---
 src/libfetchers/git.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/libfetchers/git.cc b/src/libfetchers/git.cc
index f716094b6..f7e4894fc 100644
--- a/src/libfetchers/git.cc
+++ b/src/libfetchers/git.cc
@@ -798,8 +798,10 @@ struct GitInputScheme : InputScheme
             auto rev = repoInfo.workdirInfo.headRev.value_or(nullRev);
 
             input.attrs.insert_or_assign("rev", rev.gitRev());
-            input.attrs.insert_or_assign("revCount",
-                rev == nullRev ? 0 : getRevCount(*input.settings, repoInfo, repoPath, rev));
+            if (!getShallowAttr(input)) {
+                input.attrs.insert_or_assign("revCount",
+                    rev == nullRev ? 0 : getRevCount(*input.settings, repoInfo, repoPath, rev));
+            }
 
             verifyCommit(input, repo);
         } else {