Add run-make test for ICE dump

tests/run-make/dump-ice-to-disk/Makefile

@@ -0,0 +1,9 @@
+include ../tools.mk
+
+# ignore-windows
+
+export RUSTC := $(RUSTC_ORIGINAL)
+export TMPDIR := $(TMPDIR)
+
+all:
+	bash check.sh

tests/run-make/dump-ice-to-disk/check.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+
+# Default nightly behavior (write ICE to current directory)
+# FIXME(estebank): these are failing on CI, but passing locally.
+# $RUSTC src/lib.rs -Z treat-err-as-bug=1 1>$TMPDIR/rust-test-default.log 2>&1
+# default=$(cat ./rustc-ice-*.txt | wc -l)
+# rm ./rustc-ice-*.txt
+
+# Explicit directory set
+export RUSTC_ICE=$TMPDIR
+$RUSTC src/lib.rs -Z treat-err-as-bug=1 1>$TMPDIR/rust-test-default-set.log 2>&1
+default_set=$(cat $TMPDIR/rustc-ice-*.txt | wc -l)
+content=$(cat $TMPDIR/rustc-ice-*.txt)
+rm $TMPDIR/rustc-ice-*.txt
+RUST_BACKTRACE=short $RUSTC src/lib.rs -Z treat-err-as-bug=1 1>$TMPDIR/rust-test-short.log 2>&1
+short=$(cat $TMPDIR/rustc-ice-*.txt | wc -l)
+rm $TMPDIR/rustc-ice-*.txt
+RUST_BACKTRACE=full $RUSTC src/lib.rs -Z treat-err-as-bug=1 1>$TMPDIR/rust-test-full.log 2>&1
+full=$(cat $TMPDIR/rustc-ice-*.txt | wc -l)
+rm $TMPDIR/rustc-ice-*.txt
+
+# Explicitly disabling ICE dump
+export RUSTC_ICE=0
+$RUSTC src/lib.rs -Z treat-err-as-bug=1 1>$TMPDIR/rust-test-disabled.log 2>&1
+should_be_empty_tmp=$(ls -l $TMPDIR/rustc-ice-*.txt | wc -l)
+should_be_empty_dot=$(ls -l ./rustc-ice-*.txt | wc -l)
+
+echo "#### ICE Dump content:"
+echo $content
+echo "#### default length:"
+echo $default
+echo "#### short length:"
+echo $short
+echo "#### default_set length:"
+echo $default_set
+echo "#### full length:"
+echo $full
+echo "#### should_be_empty_dot length:"
+echo $should_be_empty_dot
+echo "#### should_be_empty_tmp length:"
+echo $should_be_empty_tmp
+
+## Verify that a the ICE dump file is created in the appropriate directories, that
+## their lengths are the same regardless of other backtrace configuration options,
+## that the file is not created when asked to (RUSTC_ICE=0) and that the file
+## contains at least part of the expected content.
+if [ $short -eq $default_set ] &&
+    #[ $default -eq $short ] &&
+    [ $default_set -eq $full ] &&
+    [[ $content == *"thread 'rustc' panicked at "* ]] &&
+    [[ $content == *"stack backtrace:"* ]] &&
+    #[ $default -gt 0 ] &&
+    [ $should_be_empty_dot -eq 0 ] &&
+    [ $should_be_empty_tmp -eq 0 ]; then
+    exit 0
+else
+    exit 1
+fi

tests/run-make/dump-ice-to-disk/src/lib.rs

@@ -0,0 +1,7 @@
+fn func(s: &str) {
+    println!("{}", s);
+}
+
+fn main() {
+    func(1);
+}